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<p><strong>Original citation.</strong> Masicampo, E.J., & Baumeister, R.F. (2008). Toward a physiology of dual-process reasoning and judgment: Lemonade, willpower, and expensive rule-based analysis. <em>Psychological Science, 19</em>(3), 255-260.</p> <p><strong>Target of replication.</strong> We seek to reproduce Masicampo and Baumeister’s findings that “only lemonade with sugar reduced the attraction effect.” They predicted that “the attraction effect would be larger among depleted participants who received the placebo than among participants in the other three groups (depletion plus sugar, no depletion plus sugar, no depletion plus placebo).” This interaction was significant, F(1, 111) = 5.311, prep = .92, ηp2= .045. </p> <p><strong>A priori replication criteria.</strong> A successful replication would find a difference in the magnitude of the attraction effect (the difference between the ABC and BCD array condition) between participants who were depleted and got the placebo and all other participants. The dependent variable was the choice frequency, as was calculated as the percentage of B choices (B/(B+C)). </p> <p>In order to investigate this and to mimic the original analysis, we planned to run a 2 (glucose vs. placebo) x 2 (depletion vs. no depletion) x 2 (ABC vs. BCD array of options) between-subjects ANOVA. The effect of interest was tested by running a planned interaction contrast comparing the attraction effect in the depletion-plus-placebo condition to the attraction effect in the combination of the other three conditions (depletion-plus-glucose, no depletion-plus-placebo, no depletion-plus-glucose).</p>
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