By Paul E. Spector
The target for any social scientist accomplishing a survey is to improve a ranking on a few perspective, price or opinion - a summated ranking scale. geared toward assisting researchers build more advantageous scales, Spector exhibits find out how to confirm the variety of goods worthwhile, the correct volume of reaction different types and the best wording of things. the writer discusses easy methods to style solid goods from undesirable (including item-remainder coefficients and Cronbach's alpha) and the way to validate a scale, together with dimensional validity from issue research. straightforward, the e-book concludes with a step by step account of the way to advance a summated ranking scale according to classical try out idea.
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Extra resources for Summated rating scale construction: an introduction
Biases cannot be completely eliminated, but they can be reduced. Social desirability, for example, can sometimes be reduced by carefully wording items to reduce their socially desirable content. Other types of scales, such as forced choice, have also been developed to handle social desirability. Unfortunately, it is unlikely that all sources of bias are presently known. One can never be certain that these systematic influences have not influenced measurement. Scale developers proceed under the assumption that classical test theory represents a reasonably close approximation to their measurement situation.
Multiple standards of validity, including dimensional validity Page vi from factor analysis, are considered. Next comes the treatment of scale reliability and norms. Throughout the presentation, Spector is sensitive to issues of theory. The empirical tests never prove a theoretical construct exists, but they may point to its existence. " MICHAEL S. LEWIS-BECK SERIES EDITOR Page 1 SUMMATED RATING SCALE CONSTRUCTION: An Introduction PAUL E. SPECTOR University of South Florida 1. Introduction The summated rating scale is one of the most frequently used tools in the social sciences.
Many scales to measure such constructs contain items that are undesirable. , Do you hear voices? ) are likely to be problematic. If people score low on such scales, they might do so either because their true score on the trait is low or because they are high on social desirability and are hesitant to admit to undesirable things. Research has been conducted on several sources of bias in responding to scales. Several have been described as response sets, which are tendencies for subjects to respond to items systematically.