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Working memory involvement in reaction time and its contribution to fluid intelligence: An examination of individual differences in reaction-time distributions

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  • Meiran, Nachshon
  • Shahar, Nitzan

Abstract

Reaction-Time (RT) and Working-Memory (WM) are both correlated with fluid intelligence (GF). Prior work exploring the within-participant RT distributions shows (a) that the rate of exceptionally slow responses (indexed by the Tau parameter of the ex-Gaussian distribution) increases with WM-load, and (b) that individual differences in Tau are correlated with individual differences in WM. In the present individual-differences examination, we show that the correlation between Tau and GF was higher for tasks with an increased WM-load, i.e., with arbitrary (hence, novel) stimulus-response mapping. The results suggest that, when low-GF individuals perform reaction-time tasks with multiple novel and arbitrary stimulus-response rules, their reaction-time distribution is characterized by relatively frequent exceptionally slow responses.

Suggested Citation

  • Meiran, Nachshon & Shahar, Nitzan, 2018. "Working memory involvement in reaction time and its contribution to fluid intelligence: An examination of individual differences in reaction-time distributions," Intelligence, Elsevier, vol. 69(C), pages 176-185.
  • Handle: RePEc:eee:intell:v:69:y:2018:i:c:p:176-185
    DOI: 10.1016/j.intell.2018.06.004
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    Cited by:

    1. Frischkorn, Gidon T. & Schubert, Anna-Lena & Hagemann, Dirk, 2019. "Processing speed, working memory, and executive functions: Independent or inter-related predictors of general intelligence," Intelligence, Elsevier, vol. 75(C), pages 95-110.
    2. Garbi, Dror & Meiran, Nachshon, 2024. "The structure of individual differences in procedural working memory: Comparing task switching and stimulus response rule information load," Intelligence, Elsevier, vol. 104(C).

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