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Download full textLinacre, John Michael – 1995
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…
Descriptors: Analysis of Variance, Demography, Error of Measurement, Estimation (Mathematics)
Tang, Huixing – 1994
A method is presented for the simultaneous analysis of differential item functioning (DIF) in multi-factor situations. The method is unique in that it combines item response theory (IRT) and analysis of variance (ANOVA), takes a simultaneous approach to multifactor DIF analysis, and is capable of capturing interaction and controlling for possible…
Descriptors: Ability, Analysis of Variance, Difficulty Level, Error of Measurement
