In assessing items for a Likert scale, a discriminatory power score would be calculated on:
A)the whole preliminary Likert scale.
B)every item of the preliminary Likert scale.
C)only on those items that are used in the final Likert scale.
D)those items that are being moved from a Thurstone to a Likert scale.

Question

Quizplus · Accepted Answer

Discriminatory power score is calculated for every item of the preliminary Likert scale to determine how well each item differentiates among the responses of the participants. This helps in identifying which items are most effective in measuring the variable of interest.

In Assessing Items for a Likert Scale, a Discriminatory Power