EMPLOYMENT PSYCHOLOGY
scores in several tests in relation to each other. A curve is
plotted showing his relative standing in the various tests.
His good and poor test performances become evident at a
glance. Knowing the relative validity of the various tests,
Y =
.
ra
rosa wf: 12
BET vi1—rip . VI1—r2m
” Fas—V43 * V3
Bae V I—172% . VI —r2 RE
ry Tuu=713 2 71s
B20 VI—r%s- Vi-74 =
, i Tia.2— 713.2 * 743.2
HBT 1—73s* V1I—7ua i
Riese) = VI —(1—1%) (1 =r.) (1 — 1214.03) =
Figure 28: Outline for computing the multiple correlation coefficient for
four variables.
the investigator may make a prediction of the worker’s success.
 This method involves subjective judgment in prediction.
 It sometimes leads to judgments on the individual’s
weak points based on groundless assumptions as to the abilities
 measured by the tests. It is more useful for vocational

212