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ERIC Number: ED196952
Record Type: RIE
Publication Date: 1980
Pages: 48
Abstractor: N/A
Reference Count: 0
Using Latent Trait Measurement Models to Analyse Attitudinal Data: A Synthesis of Viewpoints.
Andrich, David
A Rasch model for ordered response categories is derived and it is shown that it retains the key features of both the Thurstone and Likert approaches to studying attitude. Key features of the latter approaches are reviewed. Characteristics in common with the Thurstone approach are: statements are scaled with respect to their affective values; these values are independent of attitudes of any persons responding; scales are rational in the sense that they have interval level properties; scale values, apart from a linear transformation, are the same as in the pair-comparison design and the equal-appearing-interval design; the model for the data, being an explicit probability model, provides formal tests of fit. Characteristics in common with the Likert approach are: no judgment group is required; persons whose attitude is to be quantified respond to statements in the usual way in terms of intensity of approval or disapproval; while thresholds or boundaries between categories are estimated, the successive categories are scored with successive integers; the attitude of a person is characterized by the simple sum of the integral scores across the set of statements; concerns with Likert's undecided category are appropriately manifested in the rating model. (Author/RL)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Likert Scales; Rasch Model; Thurstone Scales
Note: Paper presented at the 50th Anniversary of the Australian Council for Educational Research (Invitational Conference for the Improvement of Testing in Education and Psychology, University of Melbourne, Melbourne, Victoria, 1980). Best copy available.