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Does Item Difficulty Affect the Magnitude of the Retrieval Practice Effect? An Evaluation of the Retrieval Effort Hypothesis

Published online by Cambridge University Press:  10 August 2020

Marcos Felipe Rodrigues de Lima*
Affiliation:
Universidade de Brasília (Brazil)
Sebastião Venâncio
Affiliation:
Universidade de Brasília (Brazil)
Júlia Feminella
Affiliation:
Universidade de Brasília (Brazil)
Luciano Grüdtner Buratto
Affiliation:
Universidade de Brasília (Brazil)
*
Correspondence concerning this article should be addressed to Marcos Felipe Rodrigues de Lima. Universidade de Brasília. Departamento de Processos Psicológicos Básicos. Campus Darcy Ribeiro, Instituto de Psicologia, Sala ASS-12/5. 70910-900. Brasília, DF (Brazil). E-mail: lima.piraju@gmail.com

Abstract

Retrieving information by testing improves subsequent retention more than restudy, a phenomenon known as the retrieval practice effect. According to the retrieval effort hypothesis (REH), difficult items require more retrieval effort than easier items and, consequently, should benefit more from retrieval practice. In two experiments, we tested this prediction. Participants learned sets of easy and difficult Swahili–Portuguese word pairs (study phase) and repeatedly restudied half of these items and repeatedly retrieval practiced the other half (practice phase). Forty-eight hours later, they took a cued-recall test (final test phase). In both experiments, we replicated both the retrieval practice and the item difficulty effects. In Experiment 1 (N = 51), we found a greater retrieval practice effect for easy items, MDifference = .26, SD = .17, than for difficult items, MDifference = .19, SD = .19, t(50) = 2.01, p = .05, d = 0.28. In Experiment 2 (N = 28), we found a nonsignificant trend—F(1, 27) = 2.86, p = .10, $$ {\upeta}_{\mathrm{p}}^2 $$ = .10—toward a greater retrieval practice effect for difficult items, MDifference = .28, SD = .22, than for easy items, MDifference = .18, SD = .21. This was especially true for individuals who benefit from retrieval practice (difficult: MDifference = .32, SD = .18; easy: MDifference = .20, SD = .20), t(24) = –2.08, p = .05, d = –0.42. The results provide no clear evidence for the REH and are discussed in relation to current accounts of the retrieval practice effect.

Type
Research Article
Copyright
© Universidad Complutense de Madrid and Colegio Oficial de Psicólogos de Madrid 2020

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Footnotes

Authors would like to thank Beatriz A. Cavendish, for her helpful comments on a previous version of the article, and Gabriela Y. Iwama, for her suggestions and comments regarding mixed logit regression models

Conflicts of Interest: None

This work was based on a Master’s thesis submitted to the University of Brasília, and it was supported by the National Council for Scientific and Technological Development (CNPq).

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