Abstract
Discusses the contradictions and confusion in the literature on determining the optimal number of scale points in a rating scale, and suggests a mathematical model that allows for the simulation of the rating situation. The model involves generating data with different item variance-covariance structures and with different numbers of scale points. Such data were generated and used to calculate 3 reliability measures. The effects of different numbers of scale points and different covariance structures upon these reliability measures are examined, and the results help explain a large number of empirical studies exploring the "optimal number of scale points" problem. (PsycINFO Database Record (c) 2006 APA, all rights reserved).
Original language | English (US) |
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Pages (from-to) | 10-13 |
Number of pages | 4 |
Journal | Journal of Applied Psychology |
Volume | 60 |
Issue number | 1 |
DOIs | |
State | Published - Feb 1975 |
Keywords
- number of scale points, reliability of rating scale determined by mathematical model for simulation of rating situation
ASJC Scopus subject areas
- Applied Psychology