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

Structure type:: Chapter

Title:: XV. Prediction of vocational success

Collection:: Economics Books

PREDICTION OF VOCATIONAL SUCCESS 191 score. The range marked off by the critical score is called a preferred range or a critical section. For instance, an intelligence test score of C + on Army Alpha is a critical score for success in a business career, because the proportion of men who become successes in busi- ness is small among men who score lower than this. For inspectors in one great factory a score of 70 in Army Alpha was found to be a critical score. Of 337 men who in two successive years were trained to this work, 224 were satisfactory. Of the 281 men who scored 70 or better, 75% were satisfactory, while of the 56 men who scored below 70, only 23% proved satisfactory. In other words, the pre- ferred range for men to be trained as inspectors in that plant is 70 or above. Often the preferred range lies between two critical scores, because workers whose abilities are above a certain maxi- mum score are soon dissatisfied, and leave before they have made good. It is quite true of salesmen for certain products and of operatives on certain machine processes that ‘the brighter they are the quicker they leave.” For clerical em- ployees doing purely routine work there is one preferred range, while another range is preferred for jobs where some independent judgment or initiative is of value. The best procedure in establishing critical scores is to plot scores made by members of the two groups—successes and failures—on the same chart, indicating successes by one kind of symbol and failures by another kind. If there is an intermediate group, a third symbol may be used. The in- vestigator may then by inspection easily find the sections of the distribution in which one group is represented in rela- tively greater proportion than the other groups. These critical sections are then set off by critical scores. They should include a large proportion of all the cases. Critical scores may also be determined by the use of the formula for Pearson biserial 7 (formula 22). The significance of critical sections may also be deter- mined by considering the alternative categories assumed in

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