Kowalczyk, AW and Grange, JA (2016) Inhibition in Task Switching: The Reliability of the N-2 Repetition Cost. Quarterly Journal of Experimental Psychology. 1 - 43. ISSN 1747-0226

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Abstract

The n-2 repetition cost seen in task switching is the effect of slower response times performing a recently completed task (e.g. an ABA sequence) compared to performing a task that was not recently completed (e.g. a CBA sequence). This cost is thought to reflect cognitive inhibition of task representations and has been well replicated (Koch, Gade, Schuch, & Philipp, 2010). As such, the n-2 repetition cost has started to be used as a measure of individual differences in inhibitory control (e.g. Whitmer & Banich, 2007); however, the reliability of this measure has not been investigated in a systematic manner. The current study addressed this important issue. Seventy-two participants performed three task switching paradigms; participants were also assessed on rumination traits and processing speed-measures of individual differences potentially modulating the n-2 repetition cost. We found significant n-2 repetition costs for each paradigm. However, split-half reliability tests revealed that this cost was not reliable at the individual-difference level. Neither rumination tendencies nor processing speed predicted this cost. We conclude that the n-2 repetition cost is not reliable as a measure of individual differences in inhibitory control.

Item Type: Article
Uncontrolled Keywords: task switching, n–2 repetition cost, backward inhibition, reliability,
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Divisions: Faculty of Humanities and Social Sciences > School of Humanities
Related URLs:
Depositing User: Symplectic
Date Deposited: 07 Oct 2016 09:39
Last Modified: 07 Oct 2016 09:41
URI: http://eprints.keele.ac.uk/id/eprint/2235

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