The goal for any social scientist conducting a survey is to develop a rating on some attitude, value or opinion — a summated rating scale. Aimed at helping researchers construct more effective scales, Spector shows how to determine the number of items necessary, the appropriate amount of response categories and the most productive wording of items. The author discusses how to sort good items from bad (including item-remainder coefficients and Cronbach's alpha) and how to validate a scale, including dimensional validity from factor analysis. User-friendly, the book concludes with a step-by-step account of how to develop a summated rating scale based on classical test theory.

Conducting the Item Analysis

This next step in scale construction requires the collection of data so that an item analysis can be conducted. Its goal is to produce a tentative version of the scale—one that is ready for validation. With careful attention to the prior steps, and a little luck, this step will only have to be conducted once. ...

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