| { | |
| "paper_id": "W10-0210", | |
| "header": { | |
| "generated_with": "S2ORC 1.0.0", | |
| "date_generated": "2023-01-19T05:02:28.776164Z" | |
| }, | |
| "title": "@AM: Textual Attitude Analysis Model", | |
| "authors": [ | |
| { | |
| "first": "Alena", | |
| "middle": [], | |
| "last": "Neviarouskaya", | |
| "suffix": "", | |
| "affiliation": { | |
| "laboratory": "", | |
| "institution": "University of Tokyo Nat. Institute of Informatics University of Tokyo", | |
| "location": { | |
| "addrLine": "7-3-1 Hongo, Bunkyo-ku 2-1-2 Hitotsubashi Chiyoda 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656", | |
| "postCode": "101-8430, 113-8656", | |
| "settlement": "Tokyo, Tokyo", | |
| "country": "Japan, Japan, Japan" | |
| } | |
| }, | |
| "email": "" | |
| }, | |
| { | |
| "first": "Helmut", | |
| "middle": [], | |
| "last": "Prendinger", | |
| "suffix": "", | |
| "affiliation": { | |
| "laboratory": "", | |
| "institution": "University of Tokyo Nat. Institute of Informatics University of Tokyo", | |
| "location": { | |
| "addrLine": "7-3-1 Hongo, Bunkyo-ku 2-1-2 Hitotsubashi Chiyoda 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656", | |
| "postCode": "101-8430, 113-8656", | |
| "settlement": "Tokyo, Tokyo", | |
| "country": "Japan, Japan, Japan" | |
| } | |
| }, | |
| "email": "[email protected]" | |
| }, | |
| { | |
| "first": "Mitsuru", | |
| "middle": [], | |
| "last": "Ishizuka", | |
| "suffix": "", | |
| "affiliation": { | |
| "laboratory": "", | |
| "institution": "University of Tokyo Nat. Institute of Informatics University of Tokyo", | |
| "location": { | |
| "addrLine": "7-3-1 Hongo, Bunkyo-ku 2-1-2 Hitotsubashi Chiyoda 7-3-1 Hongo, Bunkyo-ku Tokyo 113-8656", | |
| "postCode": "101-8430, 113-8656", | |
| "settlement": "Tokyo, Tokyo", | |
| "country": "Japan, Japan, Japan" | |
| } | |
| }, | |
| "email": "[email protected]" | |
| } | |
| ], | |
| "year": "", | |
| "venue": null, | |
| "identifiers": {}, | |
| "abstract": "The automatic analysis and classification of text using fine-grained attitude labels is the main task we address in our research. The developed @AM system relies on compositionality principle and a novel approach based on the rules elaborated for semantically distinct verb classes. The evaluation of our method on 1000 sentences, that describe personal experiences, showed promising results: average accuracy on fine-grained level was 62%, on middle level-71%, and on top level-88%.", | |
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| "text": "The automatic analysis and classification of text using fine-grained attitude labels is the main task we address in our research. The developed @AM system relies on compositionality principle and a novel approach based on the rules elaborated for semantically distinct verb classes. The evaluation of our method on 1000 sentences, that describe personal experiences, showed promising results: average accuracy on fine-grained level was 62%, on middle level-71%, and on top level-88%.", | |
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| "text": "With rapidly growing online sources aimed at encouraging and stimulating people's discussions concerning personal, public or social issues (news, blogs, discussion forums, etc.), there is a great need in development of a computational tool for the analysis of people's attitudes. According to the Appraisal Theory (Martin and White, 2005) , attitude types define the specifics of appraisal being expressed: affect (personal emotional state), judgment (social or ethical appraisal of other's behaviour), and appreciation (evaluation of phenomena).", | |
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| "start": 314, | |
| "end": 338, | |
| "text": "(Martin and White, 2005)", | |
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| "section": "Introduction and Related Work", | |
| "sec_num": "1" | |
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| "text": "To analyse contextual sentiment (polarity) of a phrase or a sentence, rule-based approaches (Nasukawa and Yi, 2003; Mulder et al., 2004; Moilanen and Pulman, 2007; Subrahmanian and Reforgiato, 2008) , a machine-learning method using not only lexical but also syntactic features (Wilson et al., 2005) , and a model of integration of machine learning approach with compositional semantics (Choi and Cardie, 2008) were proposed.", | |
| "cite_spans": [ | |
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| "start": 92, | |
| "end": 115, | |
| "text": "(Nasukawa and Yi, 2003;", | |
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| "end": 136, | |
| "text": "Mulder et al., 2004;", | |
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| "end": 163, | |
| "text": "Moilanen and Pulman, 2007;", | |
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| "end": 198, | |
| "text": "Subrahmanian and Reforgiato, 2008)", | |
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| "text": "(Wilson et al., 2005)", | |
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| "text": "(Choi and Cardie, 2008)", | |
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| "section": "Introduction and Related Work", | |
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| "text": "With the aim to recognize fine-grained emotions from text on the level of distinct sentences, researchers have employed a keyword spotting technique (Olveres et al., 1998; Chuang and Wu, 2004; Strapparava et al., 2007) , a technique calculating emotion scores using Pointwise Mutual Information (PMI) (Kozareva et al., 2007) , an approach inspired by common-sense knowledge (Liu et al., 2003) , rule-based linguistic approaches (Boucouvalas, 2003; Chaumartin, 2007) , machine-learning methods (Alm, 2008; Aman and Szpakowicz, 2008; Strapparava and Mihalcea, 2008) , and an ensemble based multi-label classification technique (Bhowmick et al., 2009) .", | |
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| "end": 171, | |
| "text": "(Olveres et al., 1998;", | |
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| "text": "Chuang and Wu, 2004;", | |
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| "text": "(Kozareva et al., 2007)", | |
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| "text": "(Liu et al., 2003)", | |
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| "end": 447, | |
| "text": "(Boucouvalas, 2003;", | |
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| "text": "Chaumartin, 2007)", | |
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| "text": "(Alm, 2008;", | |
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| "end": 531, | |
| "text": "Aman and Szpakowicz, 2008;", | |
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| "text": "Strapparava and Mihalcea, 2008)", | |
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| "text": "(Bhowmick et al., 2009)", | |
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| "section": "Introduction and Related Work", | |
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| "text": "Early attempts to focus on distinct attitude types in the task of attitude analysis were made by Taboada and Grieve (2004) , who determined a potential value of adjectives for affect, judgement and appreciation by calculating the PMI with the pronoun-copular pairs 'I was (affect)', 'He was (judgement) ', and 'It was (appreciation) ', and Whitelaw et al. (2005) , who used machine learning technique (SVM) with fine-grained semantic distinctions in features (attitude type, orientation) in combination with \"bag of words\" to classify movie reviews. However, the concentration only on adjectives, that express appraisal, and their modifiers, greatly narrows the potential of the Whitelaw et al.'s (2005) approach.", | |
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| "start": 97, | |
| "end": 122, | |
| "text": "Taboada and Grieve (2004)", | |
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| "start": 303, | |
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| "text": "', and 'It was (appreciation)", | |
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| "start": 333, | |
| "end": 362, | |
| "text": "', and Whitelaw et al. (2005)", | |
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| "text": "In this paper we introduce our system @AM (ATtitude Analysis Model), which (1) classifies sentences according to the fine-grained attitude labels (nine affect categories (Izard, 1971) : 'anger ', 'disgust', 'fear', 'guilt', 'interest', 'joy', 'sadness', ' shame', 'surprise'; four polarity labels for judgment and appreciation: 'POS jud', 'NEG jud', 'POS app', 'NEG app'; and 'neutral'); (2) assigns the strength of the attitude; and (3) determines the level of confidence, with which the attitude is expressed. @AM relies on compositionality principle and a novel approach based on the rules elaborated for semantically distinct verb classes.", | |
| "cite_spans": [ | |
| { | |
| "start": 170, | |
| "end": 183, | |
| "text": "(Izard, 1971)", | |
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| { | |
| "start": 193, | |
| "end": 255, | |
| "text": "', 'disgust', 'fear', 'guilt', 'interest', 'joy', 'sadness', '", | |
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| "start": 339, | |
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| "text": "'NEG jud', 'POS app', 'NEG app'; and 'neutral');", | |
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| "section": "Introduction and Related Work", | |
| "sec_num": "1" | |
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| "text": "We built the lexicon for attitude analysis that includes: (1) attitude-conveying terms; (2) modifiers;", | |
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| "section": "Lexicon for Attitide Analysis", | |
| "sec_num": "2" | |
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| "text": "(3) \"functional\" words; and (4) modal operators.", | |
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| "section": "Lexicon for Attitide Analysis", | |
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| "text": "As a core of lexicon for attitude analysis, we employ Affect database and extended version of Sen-tiFul database developed by Neviarouskaya et al. (2009) . The affective features of each emotionrelated word are encoded using nine emotion labels ('anger', 'disgust', 'fear', 'guilt', 'interest', 'joy', 'sadness', 'shame', and 'surprise') and corresponding emotion intensities that range from 0.0 to 1.0. The original version of SentiFul database, which contains sentiment-conveying adjectives, adverbs, nouns, and verbs annotated by sentiment polarity, polarity scores and weights, was manually extended using attitude labels. Some examples of annotated attitude-conveying words are listed in Table 1 . It is important to note here that some words could express different attitude types (affect, judgment, appreciation) depending on context; such lexical entries were annotated by all possible categories. Table 1 . Examples of attitude-conveying words and their annotations.", | |
| "cite_spans": [ | |
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| "end": 153, | |
| "text": "Neviarouskaya et al. (2009)", | |
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| "text": "('anger', 'disgust', 'fear', 'guilt', 'interest', 'joy', 'sadness', 'shame', and 'surprise')", | |
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| "section": "The Core of Lexicon", | |
| "sec_num": "2.1" | |
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| "text": "The robust attitude analysis method should rely not only on attitude-conveying terms, but also on modifiers and contextual valence shifters (term introduced by Polanyi and Zaenen (2004) ), which are integral parts of our lexicon. We collected 138 modifiers that have an impact on contextual attitude features of related words, phrases, or clauses. They include:", | |
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| "text": "Polanyi and Zaenen (2004)", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| { | |
| "text": "1. Adverbs of degree (e.g., 'significantly', 'slightly' etc.) and adverbs of affirmation (e.g., 'absolutely', 'seemingly') that have an influence on the strength of attitude of the related words.", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| { | |
| "text": "2. Negation words (e.g., 'never', 'nothing' etc.) that reverse the polarity of related statement.", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| { | |
| "text": "3. Adverbs of doubt (e.g., 'scarcely', 'hardly' etc.) and adverbs of falseness (e.g., 'wrongly' etc.) that reverse the polarity of related statement.", | |
| "cite_spans": [], | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
| }, | |
| { | |
| "text": "4. Prepositions (e.g., 'without', 'despite' etc.) that neutralize the attitude of related words.", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| "text": "5. Condition operators (e.g., 'if', 'even though' etc.) that neutralize the attitude of related words. Adverbs of degree and adverbs of affirmation affect on related verbs, adjectives, or another adverb. Two annotators gave coefficients for intensity degree strengthening or weakening (from 0.0 to 2.0) to each of 112 collected adverbs, and the result was averaged (e.g., coeff('perfectly') = 1.9, coeff('slightly') = 0.2).", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
| }, | |
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| "text": "We distinguish two types of \"functional\" words that influence contextual attitude and its strength:", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| "text": "1. Intensifying adjectives (e.g., 'rising', 'rapidly-growing'), nouns (e.g., 'increase', 'up-tick'), and verbs (e.g., 'to grow', 'to rocket'), which increase the strength of attitude of related words.", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| { | |
| "text": "2. Reversing adjectives (e.g., 'reduced'), nouns (e.g., 'termination', 'reduction'), and verbs (e.g., 'to decrease', 'to limit', 'to diminish'), which reverse the prior polarity of related words.", | |
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| "section": "Modifiers and Functional Words", | |
| "sec_num": "2.2" | |
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| "text": "Consideration of the modal operators in the tasks of opinion mining and attitude analysis is very important, as they indicate a degree of person's belief in the truth of the proposition, which is subjective in nature. Modal expressions point to likelihood and clearly involve the speaker's judgment (Hoye, 1997) . Modals are distinguished by the confidence level.", | |
| "cite_spans": [ | |
| { | |
| "start": 299, | |
| "end": 311, | |
| "text": "(Hoye, 1997)", | |
| "ref_id": "BIBREF7" | |
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| "section": "Modal Operators", | |
| "sec_num": "2.3" | |
| }, | |
| { | |
| "text": "We collected modal operators of two categories: 1. Modal verbs (13 verbs). 2. Modal adverbs (61 adverbs). Three human annotators assigned the confidence level, which ranges from 0.0 to 1.0, to each modal verb and adverb; these ratings were averaged (e.g., conf('vaguely') = 0.17, conf('may') = 0.27, conf('arguably') = 0.63, conf('would') = 0.8, conf('veritably') = 1.0).", | |
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| "section": "Modal Operators", | |
| "sec_num": "2.3" | |
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| "text": "Words in a sentence are interrelated and, hence, each of them can influence the overall meaning and attitudinal bias of a statement. The algorithm for the attitude classification is designed based on the compositionality principle, according to which we determine the attitudinal meaning of a sentence by composing the pieces that correspond to lexical units or other linguistic constituent types governed by the rules of polarity reversal, aggregation (fusion), propagation, domination, neutralization, and intensification, at various grammatical levels.", | |
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| "section": "Compositionality Principle", | |
| "sec_num": "3" | |
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| { | |
| "text": "Polarity reversal means that phrase or statement containing attitude-conveying term/phrase with prior positive polarity becomes negative, and vice versa. The rule of polarity reversal is applied in three cases: (1) negation word-modifier in relation with attitude-conveying statement (e.g., 'never' & POS('succeed') => NEG('never succeed')); (2) adverb of doubt in relation with attitude-conveying statement (e.g., 'scarcely' & POS('relax') => NEG('scarcely relax')); (3) functional word of reversing type in relation with attitude-conveying statement (e.g., adjective 'reduced' & POS('enthusiasm') => NEG('reduced enthusiasm')). In the case of judgment and appreciation, the use of polarity reversal rule is straightforward ('POS jud' <=> 'NEG jud', 'POS app' <=> 'NEG app'). However, it is not trivial to find pairs of opposite emotions in the case of a fine-grained classification, except for 'joy' and 'sadness'. Therefore, we assume that (1) opposite emotion for three positive emotions, such as 'interest', 'joy', and 'surprise', is 'sadness' ('POS aff' => 'sadness'); and (2) opposite emotion for six negative emotions, such as 'anger', 'disgust', 'fear', 'guilt', 'sadness', and 'shame', is 'joy' ('NEG aff' => 'joy').", | |
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| "text": "The rules of aggregation (fusion) are as follows: (1) if polarities of attitude-conveying terms in adjective-noun, noun-noun, adverb-adjective, adverb-verb phrases have opposite directions, mixed polarity with dominant polarity of a descriptive term is assigned to the phrase (e.g., POS('beautiful') & NEG('fight') => POS-neg('beautiful fight'); NEG('shamelessly') & POS('celebrate') => NEGpos('shamelessly celebrate')); otherwise (2) the resulting polarity is based on the equal polarities of terms, and the strength of attitude is measured as a maximum between polarity scores (intensities) of terms (max(score1,score2)).", | |
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| "sec_num": "3" | |
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| "text": "The rule of propagation is useful, as proposed in (Nasukawa and Yi, 2003) , for the task of detection of local sentiments for given subjects. \"Propagation\" verbs propagate the sentiment towards the arguments; \"transfer\" verbs transmit sentiments among the arguments. The rule of propagation is applied when verb of \"propagation\" or \"transfer\" type is used in a phrase/clause and sentiment of an argument that has prior neutral polarity needs to be investigated (e.g., PROP-POS('to admire') & 'his", | |
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| "text": "behaviour' => POS('his behaviour'); 'Mr. X' & TRANS('supports') & NEG('crime business') => NEG('Mr. X')).", | |
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| "text": "The rules of domination are as follows: (1) if polarities of verb (this rule is applied only for certain classes of verbs) and object in a clause have opposite directions, the polarity of verb is prevailing (e.g., NEG('to deceive') & POS('hopes') => NEG('to deceive hopes')); (2) if compound sentence joints clauses using coordinate connector 'but', the attitude features of a clause following after the connector are dominant (e.g., 'NEG(It was hard to climb a mountain all night long), but POS(a magnificent view rewarded the traveler at the morning).' => POS(whole sentence)).", | |
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| "text": "The rule of neutralization is applied when preposition-modifier or condition operator relate to the attitude-conveying statement (e.g., 'despite' & NEG('worries') => NEUT('despite worries')).", | |
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| { | |
| "text": "The rule of intensification means strengthening or weakening of the polarity score (intensity), and is applied when:", | |
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| "section": "Compositionality Principle", | |
| "sec_num": "3" | |
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| "text": "1. adverb of degree or affirmation relates to attitude-conveying term (e.g., Pos_score('extremely happy') > Pos_score('happy')); 2. adjective or adverb is used in a comparative or superlative form (e.g., Neg_score('sad') < Neg_score('sadder') < Neg_score ('saddest')). Our method is capable of processing sentences of different complexity, including simple, compound, complex (with complement and relative clauses), and complex-compound sentences. To understand how words and concepts relate to each other in a sentence, we employ Connexor Machinese Syntax parser (http://www.connexor.eu/) that returns lemmas, parts of speech, dependency functions, syntactic function tags, and morphological tags. When handling the parser output, we represent the sentence as a set of primitive clauses. Each clause might include Subject formation, Verb formation and Object formation, each of which may consist of a main element (subject, verb, or object) and its attributives and complements. For the processing of complex or compound sentences, we build a so-called \"relation matrix\", which contains information about dependences (e.g., coordination, subordination, condition, contingency, etc.) between different clauses in a sentence.", | |
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| "sec_num": "3" | |
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| "text": "The annotations of words are taken from our attitude-conveying lexicon. The decision on most appropriate label, in case of words with multiple annotations (e.g., word 'unfriendly' in Table 1 ), is made based on (1) the analysis of morphological tags of nominal heads and their premodifiers in the sentence (e.g., first person pronoun, third person pronoun, demonstrative pronoun, nominative or genitive noun, etc.); (2) the analysis of the sequence of hypernymic semantic relations of a particular noun in WordNet (Miller, 1990) , which allows to determine its conceptual domain (e.g., \"person, human being\", \"artifact\", \"event\", etc.). For ex., 'I feel highly unfriendly attitude towards me' conveys 'NEG aff' ('sadness'), while 'Shop assistant's behavior was really unfriendly' and 'Plastic bags are environment unfriendly' express 'NEG jud' and 'NEG app', correspondingly.", | |
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| "start": 514, | |
| "end": 528, | |
| "text": "(Miller, 1990)", | |
| "ref_id": "BIBREF13" | |
| } | |
| ], | |
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| "start": 183, | |
| "end": 190, | |
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| } | |
| ], | |
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| "sec_num": "3" | |
| }, | |
| { | |
| "text": "While applying the compositionality principle, we consecutively assign attitude features to words, phrases, formations, clauses, and finally, to the whole sentence.", | |
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| "text": "All sentences must include a verb, because the verb tells us what action the subject is performing and object is receiving. In order to elaborate rules for attitude analysis based on the semantics of verbs, we investigated VerbNet (Kipper et al., 2007) , the largest on-line verb lexicon that is organized into verb classes characterized by syntactic and semantic coherence among members of a class. Based on the thorough analysis of 270 first-level classes of VerbNet and their members, 73 verb classes (1) were found useful for the task of attitude analysis, and (2) were further classified into 22 classes differentiated by the role that members play in attitude analysis and by rules applied to them. Our classification is shown in For each of our verb classes, we developed set of rules that are applied to attitude analysis on the phrase/clause-level. Some verb classes include verbs annotated by attitude type, prior polarity orientation, and the strength of attitude: \"Psychological state or emotional reaction\", \"Judgment\", \"Verbs of removing with negative charge\", \"Verbs of removing with positive charge\", \"Negatively charged change of state\", \"Bodily state and damage to the body\", \"Preservation\", and others. The attitude features of phrases, which involve positively or negatively charged verbs from such classes, are context-sensitive, and are defined by means of rules designed for each of the class.", | |
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| { | |
| "start": 231, | |
| "end": 252, | |
| "text": "(Kipper et al., 2007)", | |
| "ref_id": "BIBREF9" | |
| } | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
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| "text": "As an example, below we provide short description and rules elaborated for the subclass \"Objectcentered (oriented) emotional state\". Features: subject experiences emotions towards some stimulus; verb prior polarity: positive or negative; context-sensitive. Verb-Object rules (subject is ignored): 1. \"Interior perspective\" (subject's inner emotion state or attitude):", | |
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| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('admires') & O+('his brave heart') => (fusion, max(V_score,O_score)) => 'POS aff'.", | |
| "cite_spans": [], | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('admires') & O-('mafia leader') => (verb valence dominance, V_score) => 'POS aff'.", | |
| "cite_spans": [], | |
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| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('disdains') & O+('his honesty') => (verb valence dominance, V_score) => 'NEG aff'.", | |
| "cite_spans": [], | |
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| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('disdains') & O-('criminal activities') => (fusion, max(V_score,O_score)) => 'NEG aff'. 2. \"Exterior perspective\" (social/ethical judgment):", | |
| "cite_spans": [], | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('admires') & O+('his brave heart') => (fusion, max(V_score,O_score)) => 'POS jud'.", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('admires') & O-('mafia leader') => (verb valence reversal, max(V_score,O_score)) => 'NEG jud'.", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('disdains') & O+('his honesty') => (verb valence dominance, max(V_score,O_score)) => 'NEG jud'.", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('disdains') & O-('criminal activities') => (verb valence reversal, max(V_score,O_score)) => 'POS jud'. 3. In case of neutral object => attitude type and prior polarity of verb, verb score (V_score). Verb-PP (prepositional phrase) rules: 1. In case of negatively charged verb and PP starting with 'from' => verb valence dominance:", | |
| "cite_spans": [], | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('suffers') & PP-('from illness') => interior: 'NEG aff'; exterior: 'NEG jud'.", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V-('suffers') & PP+ ('from love') => interior: 'NEG aff'; exterior: 'NEG jud'. 2. In case of positively charged verb and PP starting with 'in'/'for', treat PP same as object (see above):", | |
| "cite_spans": [], | |
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| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('believes') & PP-('in evil') => interior: 'POS aff'; exterior: 'NEG jud'.", | |
| "cite_spans": [], | |
| "ref_spans": [], | |
| "eq_spans": [], | |
| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S & V+('believes') & PP+('in kindness') => interior: 'POS aff'; exterior: 'POS jud'. In the majority of rules the strength of attitude is measured as a maximum between attitude scores of a verb and an object (max(V_score,O_score)), because strength of overall attitude depends on both scores. For example, attitude conveyed by 'to suffer from grave illness' is stronger than that of 'to suffer from slight illness'.", | |
| "cite_spans": [], | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "In contrast to the rules of \"Object-centered (oriented) emotional state\" subclass, which ignore attitude features of a subject in a sentence, the rules elaborated for the \"Subject-driven change in emotional state (trans.)\" disregard the attitude features of object, as in sentences involving members of this subclass object experiences emotion, and subject causes the emotional state. For example (due to limitation of space, here and below we provide only some cases): S('Classical music') & V+('calmed') & O-('disobedient child') => interior: 'POS aff'; exterior: 'POS app'.", | |
| "cite_spans": [], | |
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| "section": "Consideration of the Semantics of Verbs", | |
| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S-('Fatal consequences of GM food intake') & V-('frighten') & O('me') => interior: 'NEG aff'; exterior: 'NEG app'. The Verb-Object rules for the subclasses \"Positive judgment\" and \"Negative judgment\" (verbs from \"Judgment\" class relate to a judgment or opinion that someone may have in reaction to something) are very close to those defined for the subclass \"Object-centered (oriented) emotional state\". However, Verb-PP rules have some specifics: for both positive and negative judgment verbs, we treat PP starting with 'for'/'of'/'as' same as object in Verb-Object rules. For example: S('He') & V-('blamed') & O+('innocent person') => interior: 'NEG jud'; exterior: 'NEG jud'. S('They') & V-('punished') & O('him') & PP-('for his misdeed') => interior: 'NEG jud'; exterior: 'POS jud'. Verbs from classes \"Favorable attitude\" and \"Adverse (unfavorable) attitude\" have prior neutral polarity and positive or negative reinforcement, correspondingly, that means that they only impact on the polarity and strength of non-neutral phrase (object in a sentence written in active voice, or subject in a sentence written in passive voice, or PP in case of some verbs). Rules: 1. If verb belongs to the \"Favorable attitude\" class and the polarity of phrase is not neutral, then the attitude score of the phrase is intensified (we use symbol '^' to indicate intensification): Along with modal verbs and modal adverbs, members of the \"Communication indicator/reinforcement of attitude\" verb class also indicate the confidence level or degree of certainty concerning given opinion. Features: subject (communicator) expresses statement with/without attitude; statement is PP starting with 'of', 'on', 'against', 'about', 'concerning', 'regarding', 'that', 'how' etc.; ground: positive or negative; reinforcement: positive or negative. Rules: 1. If the polarity of expressed statement is neutral, then the attitude is neutral: S('Professor') & [V pos. ground, pos. reinforcement, confidence:0.83]('dwelled') & PPneutral('on a question') => neutral. 2. If the polarity of expressed statement is not neutral and the reinforcement is positive, then the polarity score of the statement (PP) is intensified: S('Jane') & [V neg. ground, pos. reinforcement, confidence:0.8]('is complaining') & PP-('of a headache again') => 'NEG app'; PP_score^; confidence:0.8. 3. If the polarity of expressed statement is not neutral and reinforcement is negative, then the polarity of the statement (PP) is reversed and score is intensified: S('Max') & [V neg. ground, neg. reinforcement, confidence:0.2]('doubt') & PP-{'that' S+('his good fortune') & [V termination]('will ever end')} => 'POS app'; PP_score^; confidence:0.2. In the last example, to measure the sentiment of PP, we apply rule for the verb 'end' from the \"Termination of activity\" class, which reverses the non-neutral polarity of subject (in intransitive use of verb) or object (in transitive use of verb). For example, the polarity of the following sentence with positive PP is negative: 'They discontinued helping children'.", | |
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| "sec_num": "4" | |
| }, | |
| { | |
| "text": "S('They') & [V", | |
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| "sec_num": "4" | |
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| "text": "In order to evaluate the performance of our algorithm, we conducted experiment on the set of sentences extracted from personal stories about life experiences that were anonymously published on the social networking website Experience Project (www.experienceproject.com). This website represents an interactive platform that allows people to share personal experiences, thoughts, opinions, feelings, passions, and confessions through the network of personal stories. With over 4 million experiences accumulated (as of February 2010), Experience Project is a perfect source for researchers interested in studying different types of attitude expressed through text.", | |
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| "section": "Evaluation", | |
| "sec_num": "5" | |
| }, | |
| { | |
| "text": "For our experiment we extracted 1000 sentences from various stories grouped by topics within 13 different categories, such as \"Arts and entertainment\", \"Current events\", \"Education\", \"Family and friends\", \"Health and wellness\", \"Relationships and romance\" and others, on the Experience Project. Sentences were collected from 358 distinct topic groups, such as \"I still remember September 11\", \"I am intelligent but airheaded\", \"I think bullfighting is cruel\", \"I quit smoking\", \"I am a fashion victim\", \"I was adopted\" and others.", | |
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| "section": "Data Set Description", | |
| "sec_num": "5.1" | |
| }, | |
| { | |
| "text": "We considered three hierarchical levels of attitude labels in our experiment (see Figure 1) . Three independent annotators labeled the sentences with one of 14 categories from ALL level and a corresponding score (the strength or intensity value). These annotations were further interpreted using labels from MID and TOP levels. Fleiss' Kappa coefficient was used as a measure of reliability of human raters' annotations. The agreement coefficient on 1000 sentences was 0.53 on ALL level, 0.57 on MID level, and 0.73 on TOP level.", | |
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| "start": 82, | |
| "end": 91, | |
| "text": "Figure 1)", | |
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| "sec_num": "5.1" | |
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| "text": "Only those sentences, on which at least two out of three human raters completely agreed, were included in the \"gold standard\" for our experiment. Three \"gold standards\" were created according to the hierarchy of attitude labels. Fleiss' Kappa coefficients are 0.62, 0.63, and 0.74 on ALL, MID, and TOP levels, correspondingly. Table 3 shows the distributions of labels in the \"gold standards\". Table 3 . Label distributions in the \"gold standards\".", | |
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| { | |
| "start": 327, | |
| "end": 334, | |
| "text": "Table 3", | |
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| "start": 394, | |
| "end": 401, | |
| "text": "Table 3", | |
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| "text": "After processing each sentence from the data set by our system, we measured averaged accuracy, precision, recall, and F-score for each label within ALL, MID, and TOP levels. The results are shown in Table 4 . The ratio of the most frequent attitude label in the \"gold standard\" was considered as the baseline. As seen from the obtained results, our algorithm performed with high accuracy significantly surpassing the baselines on all levels of attitude hierarchy (except 'neutral' category on the TOP level, which is probably due to the unbalanced distribution of labels in the \"gold standard\", where 'neutral' sentences constitute less than 9%). Table 4 . Results of the system performance evaluation.", | |
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| "start": 199, | |
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| "text": "Table 4", | |
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| "sec_num": "5.2" | |
| }, | |
| { | |
| "text": "In the case of fine-grained attitude recognition (ALL level), the highest precision was obtained for 'shame' (0.923) and 'NEG jud' (0.889), while the highest recall was received for 'sadness' (0.917) Figure 1 . Hierarchy of attitude labels.", | |
| "cite_spans": [], | |
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| { | |
| "start": 200, | |
| "end": 208, | |
| "text": "Figure 1", | |
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| } | |
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| "section": "Results", | |
| "sec_num": "5.2" | |
| }, | |
| { | |
| "text": "and 'joy' (0.905) emotions at the cost of low precision (0.528 and 0.439, correspondingly). The algorithm performed with the worst results in recognition of 'NEG app' and 'neutral'. The analysis of a confusion matrix for the ALL level revealed the following top confusions of our system (see Table 5 ): (1) 'anger ', 'fear', 'guilt', 'shame', 'NEG jud', 'NEG app' and 'neutral' were predominantly incorrectly predicted as 'sadness' (for ex., @AM resulted in 'sadness' for the sentence 'I know we have several months left before the election, but I am already sick and tired of seeing the ads on TV', while human annotations were 'anger'/'anger'/'disgust'); (2) 'interest', 'POS jud' and 'POS app' were mostly confused with 'joy' by our algorithm (e.g., @AM classified the sentence 'It's one of those life changing artifacts that we must have in order to have happier, healthier lives' as 'joy'(-ful), while human annotations were 'POS app'/'POS app'/'interest').", | |
| "cite_spans": [ | |
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| "text": "', 'fear', 'guilt', 'shame', 'NEG jud', 'NEG app' and 'neutral'", | |
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| "sec_num": "5.2" | |
| }, | |
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| "text": "Incorrectly predicted labels (%), in descending order anger sadness (28.9%), joy (4.4%), neutral (4.4%), NEG app (2.2%) disgust anger (4.8%), sadness (4.8%), NEG jud (4.8%) fear sadness (13%), joy (5.6%), POS app (1.9%) guilt sadness (50%), anger (4.5%) interest joy (33.3%), neutral (7.1%), sadness (3.6%), POS app (2.4%), fear (1.2%) joy interest (3.2%), POS app (3.2%), sadness (1.1%), surprise (1.1%), neutral (1.1%) sadness neutral (3.8%), joy (1.5%), anger (0.8%), fear (0.8%), guilt (0.8%), NEG app (0.8%) shame sadness (16.7%), fear (5.6%), guilt (5.6%), NEG jud (5.6%) surprise fear (5.6%), neutral (5.6%), joy (2.8%), POS jud (2.8%) POS jud joy (37.9%), POS app (9.1%), interest (4.5%), sadness (1.5%), surprise (1.5%), NEG jud (1.5%), neutral (1.5%) NEG jud sadness (37.2%), anger (3.8%), disgust (3.8%), neutral (3.8%) POS app joy (37%), neutral (9%), surprise (7%), interest (3%), POS jud (3%), sadness (1%) NEG app sadness (44.8%), fear (13.8%), disgust (3.4%), surprise (3.4%), neutral (3.4%) neutral sadness (29.9%), joy (13.8%), interest (3.4%), fear (2.3%), POS jud (2.3%), NEG app (2.3%), NEG jud (1.1%), POS app (1.1%) Table 5 . Data from a confusion matrix for ALL level.", | |
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| "sec_num": null | |
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| "text": "Our system achieved high precision for all categories on the MID level (Table 4) , with the exception of 'NEG app' and 'neutral', although high recall was obtained only in the case of categories related to affect ('POS aff', 'NEG aff'). These results indicate that affect sensing is easier than recognition of judgment or appreciation from text. TOP level results (Table 4) show that our algorithm classifies sentences that convey positive or negative sentiment with high accuracy (92% and 91%, correspondingly). On the other hand, 'neutral' sentences still pose a challenge.", | |
| "cite_spans": [], | |
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| { | |
| "start": 71, | |
| "end": 80, | |
| "text": "(Table 4)", | |
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| { | |
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| "text": "The analysis of errors revealed that system requires common sense or additional context to deal with sentences like 'All through my life I've felt like I'm second fiddle' (\"gold standard\": 'sadness'; @AM: 'neutral') or 'For me every minute on my horse is alike an hour in heaven!' (\"gold standard\": 'joy'; @AM: 'neutral').", | |
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| "text": "We also evaluated the system performance with regard to attitude intensity estimation. The percentage of attitude-conveying sentences (not considering neutral ones), on which the result of our system conformed to the fine-grained \"gold standard\" (ALL level), according to the measured distance between intensities given by human raters (averaged values) and those obtained by our system is shown in Table 6 . As seen from the table, our system achieved satisfactory results in estimation of the strength of attitude expressed through text. 12.2 (0.6 -0.8] 2.6 (0.8 -1.0] 0.2 Table 6 . Results on intensity.", | |
| "cite_spans": [], | |
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| { | |
| "start": 399, | |
| "end": 406, | |
| "text": "Table 6", | |
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| { | |
| "start": 575, | |
| "end": 582, | |
| "text": "Table 6", | |
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| ], | |
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| "sec_num": null | |
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| { | |
| "text": "In this paper we introduced @AM, which is so far, to the best of our knowledge, the only system classifying sentences using fine-grained attitude types, and extensively dealing with the semantics of verbs in attitude analysis. Our composition approach broadens the coverage of sentences with complex contextual attitude. The evaluation results indicate that @AM achieved reliable results in the task of textual attitude analysis. The limitations include dependency on lexicon and on accuracy of the parser. The primary objective for the future research is to use the results of named-entity recognition software in our algorithm.", | |
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| "section": "Conclusions", | |
| "sec_num": "6" | |
| } | |
| ], | |
| "back_matter": [], | |
| "bib_entries": { | |
| "BIBREF0": { | |
| "ref_id": "b0", | |
| "title": "Affect in Text and Speech. PhD Dissertation", | |
| "authors": [ | |
| { | |
| "first": "Cecilia", | |
| "middle": [ | |
| "O" | |
| ], | |
| "last": "Alm", | |
| "suffix": "" | |
| } | |
| ], | |
| "year": 2008, | |
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| "volume": "", | |
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| "ref_entries": { | |
| "FIGREF0": { | |
| "text": "pos. reinforcement]('elected') & O+('fair judge') => 'POS app'; O_score^. S('They') & [V pos. reinforcement]('elected') & O-('corrupt candidate') => 'NEG app'; O_score^. 2. If verb belongs to the \"Adverse (unfavorable) attitude\" class and the polarity of phrase is not neutral, then the polarity of phrase is reversed and score is intensified:S('They') & [Vneg. reinforcement]('prevented') & O-('the spread of disease') => 'POS app'; O_score^. S+('His achievements') & [V neg. reinforcement]('were overstated') => 'NEG app'; S_score^. Below are examples of processing the sentences with verbs from \"Verbs of removing\" class. \"Verbs of removing with neutral charge\": S('The tape-recorder') & [V neutral rem.]('automatically ejects') & O-neutral('the tape') => neutral. S('The safety invention') & [V neutral rem.]('ejected') & O('the pilot') & PP-('from burning plane') => 'POS app'; PP_score^. \"Verbs of removing with negative charge\": S('Manager') & [V neg. rem.]('fired') & O-('careless employee') & PP('from the company') => 'POS app'; max(V_score,O_score). \"Verbs of removing with positive charge\": S('They') & [V pos. rem.]('evacuated') & O('children') & PP-('from dangerous place') => 'POS app'; max(V_score,PP_score).", | |
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| "type_str": "figure", | |
| "num": null | |
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| "TABREF1": { | |
| "num": null, | |
| "type_str": "table", | |
| "html": null, | |
| "text": "", | |
| "content": "<table><tr><td>Verb class (verb samples)</td></tr><tr><td>1 Psychological state or emotional reaction</td></tr><tr><td>1.1 Object-centered (oriented) emotional state (adore, re-</td></tr><tr><td>gret)</td></tr><tr><td>1.2 Subject-driven change in emotional state (trans.)</td></tr><tr><td>(charm, inspire, bother)</td></tr><tr><td>1.3 Subject-driven change in emotional state (intrans.) (ap-</td></tr><tr><td>peal to, grate on)</td></tr><tr><td>2 Judgment</td></tr><tr><td>2.1 Positive judgment (bless, honor)</td></tr><tr><td>2.2 Negative judgment (blame, punish)</td></tr><tr><td>3 Favorable attitude (accept, allow, tolerate)</td></tr><tr><td>4 Adverse (unfavorable) attitude (discourage, elude, forbid)</td></tr><tr><td>5 Favorable or adverse calibratable changes of state (grow,</td></tr><tr><td>decline)</td></tr><tr><td>6 Verbs of removing</td></tr><tr><td>6.1 Verbs of removing with neutral charge (delete, remove)</td></tr><tr><td>6.2 Verbs of removing with negative charge (deport, expel)</td></tr><tr><td>6.3 Verbs of removing with positive charge (evacuate,</td></tr><tr><td>cure)</td></tr><tr><td>7 Negatively charged change of state (break, crush, smash)</td></tr><tr><td>8 Bodily state and damage to the body (sicken, injure)</td></tr><tr><td>9 Aspectual verbs</td></tr><tr><td>9.1 Initiation, continuation of activity, and sustaining (be-</td></tr><tr><td>gin, continue, maintain)</td></tr><tr><td>9.2 Termination of activity (quit, finish)</td></tr><tr><td>10 Preservation (defend, insure)</td></tr><tr><td>11 Verbs of destruction and killing (damage, poison)</td></tr><tr><td>12 Disappearance (disappear, die)</td></tr><tr><td>13 Limitation and subjugation (confine, restrict)</td></tr><tr><td>14 Assistance (succor, help)</td></tr><tr><td>15 Obtaining (win, earn)</td></tr><tr><td>16 Communication indicator/reinforcement of attitude (guess,</td></tr><tr><td>complain, deny)</td></tr><tr><td>17 Verbs of leaving (abandon, desert)</td></tr><tr><td>18 Changes in social status or condition (canonize, widow)</td></tr><tr><td>19 Success and failure</td></tr><tr><td>19.1 Success (succeed, manage)</td></tr><tr><td>19.2 Failure (fail, flub)</td></tr><tr><td>20 Emotional nonverbal expression (smile, weep)</td></tr><tr><td>21 Social interaction (marry, divorce)</td></tr><tr><td>22 Transmitting verbs (supply, provide)</td></tr></table>" | |
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| "TABREF2": { | |
| "num": null, | |
| "type_str": "table", | |
| "html": null, | |
| "text": "Verb classes defined for attitude analysis.", | |
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| } | |
| } | |
| } | |
| } |