Table 3 
COMPLETENESS OF INFORMATION EXTRACTION-- 
RIGHT SCORES, COMPONENT-MODIFIER SCORING 
(FOR 16 EXPERIENCED PI's) 
  
  
Mean 
  
  
Target Performance ans dbi) 
1 6.1 18 3 
2 25.8 48 54 
5 5.5 16 pn 
4 6.2 17 36 
5 5.6 15 43 
6 1.6 2T 28 
T 13.7 3L Lh 
8 10.9 28 29 
9 2.7 T 39 
Av. 9.5 22.8 39 
  
“Based on total number of different objects correctly identified, 
The effect of individual differences on performance and more effec- 
tive utilization of the same talent are discussed in connection with two 
additional performance indexes obtained--range of PI ability and inter- 
and intra-individual differences in PI performance. 
Photointerpreter Abilities. 
the range of photointerpreter talent. 
to provide accurate and complete info 
In Table l| are presented the highest 
nine targets for each man of the exp 
and his lowest score. 
Archives 6 
- 13 - 
This analysis provided some indexes of 
Wide differences in the ability 
rmation were found among interpreters. 
component-modifier score across all 
erimental group, his average Score, 
A quick glance down the average score column re- 
veals a wide range in performance from 17% to 54%. Apparently individual 
differences contributed appreciably to the total variance in performance.