TOWARD A COMMON PROCEDURE USING LIKERT AND LIKERT TYPE SCALES IN SMALL GROUPS COMPARATIVE DESIGN OBSERVATIONS
Often, users' opinions in small groups comparative observations are measured through Likert and Likert type items based questionnaires. Resulting data are analyzed in order to find any statistical difference whether positive or negative among the two conditions. Due to the confusion around Likert scales ordinal or interval nature, how to statistically analyze them, is still an open matter of discussion. Should it be a parametric or non parametric approach? This article analyze the existing literature and propose an approach which aim is to avoid fragmentation in this type of research.