ERIC Number: ED481658
Record Type: Non-Journal
Publication Date: 2000-Apr
Reference Count: N/A
Applying the Rasch Model for Ordered Categories To Assess the Relationship between Response Choice Content and Category Threshold Disorder.
Popp, Sharon Osborn; Behrens, John T.; Ryan, Joseph M.; Hess, Robert K.
The Rasch model for ordered categories was applied to responses on a science attitude survey that uses a combined semantic differential and Likert-type scale format. Data were drawn from the Views about Science Survey for 1,300 high school students. Examination of category response function graphs and threshold estimates allowed classification of items into three patterns of threshold disorder. The three patterns provided insight into the degree of content polarization between endpoint response choices (e.g., items with highly polarized response choice content produce responses toward the extremes and have disordered thresholds or compressed threshold range among the central categories). The patterns were used to direct modification of the response format with respect to number of choices and extremity in endpoint wording. (Contains 2 figures and 17 references.) (Author/SLD)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A