Individual differences in performance on elementary cognitive tasks (ECTs): Lawful vs. problematic parameters

Citation
Rd. Roberts et G. Pallier, Individual differences in performance on elementary cognitive tasks (ECTs): Lawful vs. problematic parameters, J GEN PSYCH, 128(3), 2001, pp. 279-314
Citations number
113
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Psycology
Journal title
JOURNAL OF GENERAL PSYCHOLOGY
ISSN journal
0022-1309 → ACNP
Volume
128
Issue
3
Year of publication
2001
Pages
279 - 314
Database
ISI
SICI code
0022-1309(200107)128:3<279:IDIPOE>2.0.ZU;2-1
Abstract
Over the past 2 decades, the cognitive-correlates approach has dominated in vestigations into the nature of intelligence. This research program relies on a number of processing speed parameters (apart from "average performance "). These measures include the slope, intercept, and intraindividual variab ility of both decision time and movement time. By correlating these measure s with established markers of intelligence, researchers postulate theoretic al models underlying these information-processing constructs. However, ther e is a lack of substantive evidence that these phenomena are as robust with in the individual as has been proposed. The authors tested the properties o f intraindividual parameters by asking participants (N = 179) to perform 10 elementary cognitive tasks (ECTs). Detailed analyses revealed that average performance parameters, extracted from these ECTs, behaved lawfully. Howev er, up to 40% of participants failed to provide acceptable indices of intra individual model fit. Similarly, intraindividual variability measures appea red less valid than previously suggested. The implications of these finding s for cognitive and biological models of intelligence are discussed.