ERIC Number: ED219418
Record Type: RIE
Publication Date: 1982-Mar
Reference Count: 0
Use of Item Dimensionality to Reduce Test Burden in Title I Projects.
Yap, Kim Onn
A few multi-dimensional items were found to be more efficient than a larger number of uni-dimensional items in tests for participant selection and evaluation of such compensatory educational programs as Title I. A multi-dimensional scaling technique is described which derives scores for each item on three dimensions, and allows multiple scores to be derived from the same set of test items. A 35-item English language test was administered to first- and second-grade bilingual students and an inter-item correlation matrix was computed. In an analysis by the INDSCAL program, a three dimensional configuration of pronoun use, object identification and word-endings pronunciation was found. The scale scores, intercorrelations among nine score variables, and degrees of item saliences on the dimensions were calculated. Five items were classified as multi-dimensional (appearing in all three clusters of items based on dimensions) and seven were identified as uni-dimensional. The possibility of using item dimensionality to reduce the test burden in program evaluation is discussed with suggestions for improving the present procedure regarding scoring algorithms and salience measures. (Author/CM)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers: Elementary Secondary Education Act Title I; Individual Differences Scaling (INDSCAL); Item Dimensionality
Note: Paper presented at the Annual Meeting of the American Educational Research Association (66th, New York, NY, March 19-23, 1982).