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Fortune is fickle: null-effects of disfluency on learning outcomes

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Abstract

Recently, Diemand-Yauman et al. Cognition, 118, 114–118 (2011) demonstrated that learning with disfluent (hard-to-read) materials is more effective than learning with easy-to-read materials – a study that has since stipulated a number of follow-up studies (with mixed results). However, there is a potential confound in the original experiments: The disfluent materials were not only disfluent but also rather unusual. Therefore, they might have been particularly distinctive and have attracted more attention, which then resulted in better learning. We conducted three experiments to address this confound, all of them slightly modified replications of Diemand-Yauman et al.’s Experiment 1. Participants received five lists, either at their own pace on a computer screen (Experiment 1) or experimenter-paced on paper (Experiments 2 & 3). In Experiments 1 and 2, participants either received one fluent and four disfluent lists or they received four fluent lists and one disfluent list. The position of the distinct list varied across participants. In Experiment 3, the distinct list was always the penultimate one. In none of the experiments, learning performance was affected by any of the experimental manipulations. Our results question the generality of the disfluency effect with respect to learning.

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Notes

  1. We thank an anonymous reviewer for this suggestion.

  2. We would like to thank an anonymous reviewer for this suggestion.

  3. A first attempt to test this hypothesis was undertaken by Eckart et al. (2015), who varied the number of the to-be-remembered aliens in the learning phase and the number of questions asked in the final test. In none of the conditions, a disfluency effect was found.

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Correspondence to Ralf Rummer.

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Rummer, R., Schweppe, J. & Schwede, A. Fortune is fickle: null-effects of disfluency on learning outcomes. Metacognition Learning 11, 57–70 (2016). https://doi.org/10.1007/s11409-015-9151-5

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