MIL ERE eh En 
  
Table 4 
INTER- AND INTRA-INDIVIDUAL DIFFERENCES IN PERFORMANCE-- 
COMPONENT-MODIFIER SCORES IN PERCENT" 
(FOR 16 EXPERIENCED PI's) 
  
  
  
  
Actual High Low Average 
Man Score for Man Score for Man Score for Man 
A 88 29 47 
B 58 LI 47 
C T4 AT 46 
D 60 22 Ll 
E 63 zl 149 
F 43 0 17 
G 60 0 29 
H 53 MT 29 
T 71 10 47 
J 71 0 20 
K 62 13 p 
L 55 18 26 
M 16 22 43 
N 72 22 5 
0 58 13 36 
P 5 lh 25 
%The score = ro A Xx - 100 
  
Expectancy Score 
Not only were extensive differences found among individuals, but 
a given individual was found to vary appreciably in his ability to inter- 
pret different targets. If the assumption is made that, by the use of 
the expectancy scoring procedure, the targets on the whole are of approxi- 
mately equal difficulty (permitting comparison across targets), then 
actual high and low scores for a given man should show his differential 
abilities as & photointerpreter. For example, Interpreter J had an 
actual high score of 71% on Target 2 and a low score of 0% on Target X, 
His average score was 39%. 
  
  
Archives 6