REACTION-TIME AND MOVEMENT TIME RELATIONSHIPS WITH INTELLIGENCE IN 3 DIFFERENT SIMPLE TASKS

The purposes of the present study were (a) to investigate the MT/IQ re lationship in a task involving a more complex movement than is typical ly required and (b) to compare RT/IQ and MT/IQ relationships across th ree different types of tasks. Forty-one adult subjects were administer ed the Kaufman Brief Intelligence Test and three tasks at different sp eeds: (1) a computer-administered Hick paradigm task at five levels of task complexity, (2) a simple target-striking task that allows for a complex movement, and (3) a paper-and-pencil copying task. Results wer e: (a) the direction of RT/IQ and MT/IQ correlations were as expected for the Hick paradigm task, but the sizes of correlations were low; (b ) no significant relationships with IQ were found for the RT or MT com ponents of the target-striking task; (c) significant correlations with RT but not MT were found for the copying task; (d) little evidence fu r inter-task similarity was found; and (e) relationships were stronger for the non-verbal than the verbal part of the intelligence test. (C) 1998 Elsevier Science Ltd. All rights reserved.