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date: 09 December 2019

Abstract and Keywords

In this chapter, I present two broad topics: psychological measurement, or the process of assigning numbers to observations to quantify important characteristics of individuals, and the use of testing and assessment within counseling psychology. The first half of the chapter describes principles of measurement, including methods of scale and test development and evaluating the psychometric characteristics of tests (reliability and validity). The second half focuses on the use of testing and assessment, including models of assessment within counseling psychology, various types of commonly used assessment tools, computer-assisted and Internet-based assessment, gender and diversity issues, considerations in the selection and use of assessment in counseling, and professional and ethical issues.

Keywords: assessment, testing, validity, reliability, individual differences

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