The main objective of this study was to influence implicit learning through two different classical manipulations and to inspect whether working memory capacity (WMC) and personality were related to the different measures of learning. With that purpose, in Experiment 1 we asked 172 undergraduate students of psychology to perform a serial reaction time (SRT) task under single- or dual-task conditions and to complete a WMC task and a personality test. In Experiment 2, 164 students performed the SRT task under incidental or intentional conditions and also filled a WMC task and a personality test. In both experiments, WMC influenced learning, but this relation was found only when attention was not loaded (Experiment 1) or when intentional instructions were given (Experiment 2). The pattern of relations with personality, although more varied, also showed a commonality between both experiments: learning under the most implicit conditions correlated positively with extraversion.
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