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 by criterion and test. A mathematical expression of the validity of a test answers the question, “To what degree does the test measure abilities which are required for success in the occupation?” The reliability of a test is the accuracy of the measure- ments it yields. It answers the questions “How well does this test predict itself?”, or “How accurately does it mea- sure the abilities it is supposed to measure?” This accuracy can be determined either (1) by repeating the test and corre- lating the two series of measurements, or (2) by correlating records obtained with two similar forms of the test (or the odd items with the even, or the first half with the second half). Either coefficient of correlation is called the coefi- cient of reliability. The first is the upper limit and the sec- ond the lower limit of the true reliability coefficient (86, p. 203). Formulas for use in computing these correlations are found on pages 174 ff. Factors which make for a low reliability coefficient of a test are: 1. Variability in the ability tested; that is, susceptibility to embarrassment, fatigue, and other temporary influences, and increase of the ability through training. 2. Errors in measurement due to faults in the test or in its administration. 3. Restriction in the range of ability measured. If a test has high reliability, the inference may be drawn that the abilities it measures are not subject to fluctuations or errors of measurement. Low reliabilities, however, must be due to one or more of the above factors. The first factor is diminished when only a few minutes are allowed between the first and second forms, or when the odd items are correlated with the even items of one form. It is important, however, to know what fluctuations actually exist in the ability in question, for if the ability is subject to ups and downs as shown in low self-correlation of the test, then it is difficult to measure that ability for purposes of vocational 166

Access restriction

Copyright

fullscreen: Procedures in employment psychology

Monograph

Chapter

Table of contents

Download

Monograph

Chapter

This page

Image fragment

Citation links

Citation recommendation