Formulas for Equating Ratings on Different Scales.

Aiken, Lewis R.

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Peer reviewed

ERIC Number: EJ355053

Record Type: CIJE

Publication Date: 1987

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Formulas for Equating Ratings on Different Scales.

Aiken, Lewis R.

Educational and Psychological Measurement, v47 n1 p51-54 Spr 1987

Formulas for transforming scores and statistics on a rating scale having any number of categories to a scale having a different number of categories are described. To illustrate the use of one of the formulas, the means and variances of items on six forms of a course evaluation questionnaire were compared. (Author/LMO)

Descriptors: Mathematical Models, Rating Scales, Scoring, Statistical Studies, Transformations (Mathematics)

Publication Type: Journal Articles; Reports - Descriptive; Reports - Research

Education Level: N/A

Audience: N/A

Language: English

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