While<unk>  has never been an official diagnosis in the Diagnostic and Statistical Manual of Mental Disorders published by the American Psychiatric Association, it was a classification in the DSM-4 to refer to someone with<unk>  who has an intellectual disability (an IQ of 69 or below). But in the present diagnostic standards in the DSM-5, the classification of LFA has been removed. The criteria for<unk>  spectrum disorders in the DSM-5 is broken down into three levels of support required, the criteria for level 3 (requiring very substantial support) includes severe deficits in communication skills (verbal and nonverbal), inflexibility of behavior, extreme difficulty coping with change, and extreme difficulty with shifting focus and attention. Individuals with level 3<unk>  would initiate very limited amounts of social interactions and would respond only to direct social approaches from others. The ICD-10 criteria for childhood<unk>  postulate that abnormal or impaired development is evident before the age of 3 in receptive or expressive language used in social communication, development of selective social attachments or reciprocal social interactions, or functional and symbolic play. The children would also be required to exhibit six other symptoms from three macro-categories pertaining to qualitative impairment in social interactions, quantitative abnormalities in communication, and restricted/repetitive/stereotyped patterns of behavior, interests, and activities. ICD-10 differentiates high<unk>  and<unk> ic people by diagnosing the additional code of intellectual disability.
Low-functioning autism
High-functioning autism
Nonverbal autism
Autism spectrum
Multiple complex developmental disorder
Conduct disorder
Selective mutism
Pervasive developmental disorder