Validity of the worst performance rule as a function of task complexity and psychometric g: On the crucial role of g saturation

Rammsayer, Thomas; Troche, Stefan (2016). Validity of the worst performance rule as a function of task complexity and psychometric g: On the crucial role of g saturation. Journal of Intelligence, 4(5), pp. 1-15. MDPI 10.3390/jintelligence4010005

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Within the mental speed approach to intelligence, the worst performance rule (WPR) states that the slower trials of a reaction time (RT) task reveal more about intelligence than do faster trials. There is some evidence that the validity of the WPR may depend on high g saturation of both the RT task and the intelligence test applied. To directly assess the concomitant influence of task complexity, as an indicator of task-related g load, and g saturation of the psychometric measure of intelligence on the WPR, data from 245 younger adults were analyzed. To obtain a highly g-loaded measure of intelligence, psychometric g was derived from 12 intelligence scales. This g factor was contrasted with the mental ability scale that showed the smallest factor loading on g. For experimental manipulation of g saturation of the mental speed task, three versions of a Hick RT task with increasing levels of task complexity were applied. While there was no indication for a general WPR effect when a low g-saturated measure of intelligence was used, the WPR could be confirmed for the highly g-loaded measure of intelligence. In this latter condition, the correlation between worst performance and psychometric g was also significantly higher for the more complex 1-bit and 2-bit conditions than for the 0-bit condition of the Hick task. Our findings clearly indicate that the WPR depends primarily on the g factor and, thus, only holds for the highly g-loaded measure of psychometric intelligence.

Item Type:

Journal Article (Original Article)

Division/Institute:

07 Faculty of Human Sciences > Institute of Psychology
07 Faculty of Human Sciences > Institute of Psychology > Personality Psychology, Differential Psychology and Diagnostics

UniBE Contributor:

Rammsayer, Thomas and Troche, Stefan

Subjects:

100 Philosophy > 150 Psychology
300 Social sciences, sociology & anthropology > 370 Education

ISSN:

2079-3200

Publisher:

MDPI

Language:

English

Submitter:

Karin Dubler

Date Deposited:

21 Jun 2017 15:57

Last Modified:

08 Mar 2019 07:52

Publisher DOI:

10.3390/jintelligence4010005

BORIS DOI:

10.7892/boris.95788

URI:

https://boris.unibe.ch/id/eprint/95788

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