Procedures in employment psychology

Bibliographic data

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

Usage license:: Get license information via the feedback formular.

Chapter

Document type:: Monograph

Structure type:: Chapter

Title:: XIII. Validation of the measuring instruments

Collection:: Economics Books

EMPLOYMENT PSYCHOLOGY tween the groups. The second type of device gives a single numerical index of the concomitance of the two variables— a coefficient of correlation. It is usually employed when both test scores and criterion are continuous variables, although some correlation formulas may be used when either or both are discrete variables. GROUP COMPARISONS If the criterion of success is a discrete variable, enabling the investigator to divide the subjects into two or three groups—the successes, the undistinguished, and the failures —the method of group comparisons is indicated. This meth- od discloses how well the measuring instrument under inves- tigation differentiates these groups. For a measuring instru- ment to have prognostic value, the successes and the failures must be well differentiated. Differentiation of groups by test scores may be studied by drawing for each of the groups a distribution curve of scores in the test. The distribution curves for the success group and the failure group should be drawn on the same chart and with the same reference points. The differentiating capacity of the test may be observed by noting the over- lapping of the two distributions. To obtain an accurate index of this differentiation, we must first compute the means and standard deviations of the distributions of test scores for the vocational successes and the vocational failures. The standard deviations of the means are obtained by the formula: (=\ Hi; Td ND i= [EE or N N where # is the deviation of each measure from the mean, d any deviation from the mean and f the frequency of that deviation, 5, the standard deviation of the distribution, and 170 NT

Access restriction

Copyright

fullscreen: Procedures in employment psychology

Monograph

Chapter

Table of contents

Download

Monograph

Chapter

This page

Image fragment

Citation links

Citation recommendation