Strategy use in jensen's RT paradigm: Relationships to intelligence?

Con Stough*, Ted Nettelbeck, Christopher Cooper, Tim Bates

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Jensen has reported several studies that have demonstrated a significant relationship between measures of choice reaction time (RT) and IQ, and has concluded that speed of information processing is causally related to the development of intelligence. All of these studies have employed a procedure that separates decision time (DT) from movement time (MT), and which assumes that the time from stimulus onset to the release of a home key accurately measures DT. Recently, Smith and Carew (1987) provided evidence that some subjects use task strategies which shorten and thus bias their DTs. Such a strategy may invalidate speed of information processing explanations of past DT‐IQ results. The present study replicates the Smith and Carew finding, and provides preliminary information on the relationship between both masked and unmasked RT measures and intelligence test scores. The results indicate that the addition of a mask (to prevent strategy use in RT tasks) adds a constant amount of time to the average 1‐, 2‐, 4‐, and 8‐choice DTs, and does not change the slope of the function relation mean DT across stimulus complexity. As significant negative correlations between mean DT and IQ (Wechsler Adult Intelligence Scale ‐ Revised and die Raven Advanced Progressive Matrices) were observed in both masked and unmasked RT conditions, it is suggested that strategy use in this procedure does not cause the relationship between DT and IQ reported in previous experiments. MT variables and IQ were negatively correlated. Slope of mean DT across choice and IQ were not significantly correlated. These results suggest that the Hick information processing model of intelligence should be replaced. 1995 Australian Psychological Society
Original languageEnglish
Pages (from-to)61-65
Number of pages5
JournalAustralian Journal of Psychology
Volume47
Issue number2
DOIs
Publication statusPublished - 1 Aug 1995

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