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ERIC Number: ED390942
Record Type: Non-Journal
Publication Date: 1995-Apr
Pages: 9
Abstractor: N/A
Reference Count: N/A
ANOVA with Rasch Measures.
Linacre, John Michael
Various methods of estimating main effects from ordinal data are presented and contrasted. Problems discussed include: (1) at what level to accumulate ordinal data into linear measures; (2) how to maintain scaling across analyses; and (3) the inevitable confounding of within cell variance with measurement error. An example shows three methods of estimating demographic main effects from student responses to an arithmetic test previously reported and three approaches to reporting those results: (1) a routine Rasch analysis of the 776 students by 4 items; (2) accumulating the data at a main effect level and Rasch analysis; and (3) accumulating the data at a main cell level and Rasch analyzing. The usefulness of each of the methods is discussed. (Contains one figure and five references.) (Author/SLD)
Publication Type: Reports - Evaluative; Speeches/Meeting Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A