ERIC Number: ED223673
Record Type: RIE
Publication Date: 1982-Mar-22
Reference Count: 0
Interpretation of the Rasch Ability and Difficulty Scales for Educational Purposes.
Woodcock, Richard W.
Though many test developers have utilized item response theory in their work, few have taken advantage of the potential of item response theory for providing new interpretation procedures that accentuate the educational implications to be drawn from test scores. This paper describes several features, based upon the Rasch difficulty and ability scales, that have been incorporated into the interpretation schemes of test batteries currently used in the schools: the Woodcock Johnson Psycho-Educational Battery, Key Math Diagnostic Arithmetic Test, Woodcock Language Proficiency Battery, and the Woodcock Reading Mastery Tests. Among the features described are: common profiling of item difficulty and student ability, the "relative performance index," and the "instructional range." (Author)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Authoring Institution: N/A
Identifiers: Keymath Diagnostic Arithmetic Test; Rasch Model; Test Batteries; Woodcock Johnson Psycho Educational Battery; Woodcock Language Proficiency Battery; Woodcock Reading Mastery Test
Note: Paper presented at the Annual Meeting of the National Council on Measurement in Education (New York, NY, March 20-22, 1982); Tables may not reproduce well due to small print.