The fundamental requirement of using Likert
scales to measure affective behaviors-that all
respondents must use the ordered response
categories of all scale statements in the same
way-is examined. Scaling problems arise when
attitude statements within a Likert scale are
unfolding preference data, and when the position
and spacing of the ordered response categories are
interpreted differently across scale statements and
among respondents. The assignment of a neutral
response category in the center of the response
scale is questionable. These problems pertain to
issues of the existence of an interval scale, the
dimensionality of the trait, and patterns of item
response functions. An attempt is made to resolve
these problems using two contrasting scaling
methods-item response theory modeling and dual
scaling. The primary result is that conformity of
responses to the item response theory model
requirements and targeting of scale statements and
their ordered response categories to the respondents
in dual scaling are vital for a resolution of
these problems. This study establishes the similarity
of the two scaling methods. Index terms:
dual scaling, items response theory, jackknife technique,
Likert scaling, Rasch model, rating scale model.
Cheung, K. C & Mooi, L. C. (1994). A comparison between the rating scale model and dual scaling for Likert scales. Applied Psychological Measurement, 18, 1-13. doi:10.1177/014662169401800101
Cheung, K. C.; Mooi, L. C..
A comparison between the rating scale model and dual scaling for Likert scales.
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