Inspection time, intelligence, and response strategy
Lally, M.; Nettelbeck, T.
American Journal of Mental Deficiency 84(6): 553-560
1980
ISSN/ISBN: 0002-9351 PMID: 7377227 Document Number: 158159
Young male to stimuli remained relatively constant for both procedures. For nonretarded individuals, .lambda. estimates remained approximately the same, although RT was slowed significantly when the response required was more complex. Patterns of RT were interpreted as indicating differences between the groups in response strategy, with retarded persons responding on the basis of little stimulus evidence. In a 2nd experiment an attempt was made to reduce estimates of .lambda. among 14 retarded individuals by encouraging them to accumulate more evidence before responding. In one condition subjects were required to wait 5 s after stimulus onset before responding; in the other, they responded as quickly and as accurately as possible. Delayed responding did reduce estimates of .lambda. obtained but not sufficiently to account for more than a small part of the difference between the performance of retarded and nonretarded individuals.