x Xx x Xo en 00 0.0 O 00 0 00000 0 x 
ere SR XO XX OO 0 0 0 _ 0 oo 0 00000 OX OXXN¥ _ 
50 55 60 65 70 75 go 25-40 95 100 105 10 ns 120 125 i130 
-y Score . 
O° 0 =Those who have remained with the company 
0 X =Those who have left the company 
Figure 24: Mental alertness scores of workers who have remained with the firm and workers who have left. Stability at 
this work apparently calls for a moderate degree of mental alertness. To eliminate those who are too bright or too dull 
critical scores should be set at v8 and 121. Data from Kenagy and Yoakum (89, p. 255.)