Procedures in employment psychology

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Monograph

Identifikator:: 173623112X

URN:: urn:nbn:de:zbw-retromon-112923

Document type:: Monograph

Author:: Bingham, Walter Van Dyke http://d-nb.info/gnd/123042593; Freyd, Max

Title:: Procedures in employment psychology

Place of publication:: Chicago & New York

Publisher:: Shaw

Year of publication:: 1926

Scope:: XI, 269 S

Digitisation:: 2020

Collection:: Economics Books

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Document type:: Monograph

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Title:: XIII. Validation of the measuring instruments

Collection:: Economics Books

EMPLOYMENT PSYCHOLOGY ment of specific employment tests or other indexes of prob- able success cannot command the respect of the thoughtful business executive who has learned to appreciate science not only in engineering and finance but also in the realm of human adjustment. The procedure of determining the re- lationship between measurements of ability and the criterion of vocational success requires an understanding of what is meant by coefficients of correlation between two variables, by reliability of the measures on which these correlations are computed, and by validity of the test measurement as judged by its correlation with the criterion. The reader must turn to treatises on statistical method mentioned below for a com- prehensive discussion of theory. Here he will find conve- niently summarized the successive statistical steps to be taken in ascertaining the significant relationships between test score and criterion. The methods of determining the predictive value of definite scores will be reserved for later chapters. There are conditions, to be determined for each investiga- tion, under which the methods and devices for test valida- tion may be omitted entirely and the investigator may proceed at once to the practical methods described in Chap- ters XV and XVI for determining the predictive value of each score. If, for example, distribution curves of test scores have been drawn for vocational successes and for vocational failures, critical scores or critical sections (pre- ferred ranges) may be set off even though the significance of the difference between the two groups in test performance has not been determined. It will be assumed in this discussion of statistical devices that the reader is familiar with one or more of the standard text-books on statistics, such as Rugg (157), Thurstone (196), Otis (125), Yule (233), West (219), Brown and Thomson (21), Jones (83), Thorndike (191), Kelley (86), and Davenport (42); and that he knows the meaning and significance of the most common statistical concepts. The main purpose of these chapters is to outline all the statistical 164

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