Running head: AN EXPLICIT STRATEGY INTERFERES WITH SENSORIMOTOR

نویسندگان

  • Bryan L. Benson
  • Joaquin A. Anguera
  • Rachael D. Seidler
  • Bryan Benson
چکیده

27 Although sensorimotor adaptation is typically thought of as an implicit form of learning, 28 it has been shown that participants who gain explicit awareness of the nature of the perturbation 29 during adaptation exhibit more learning than those that do not. With rare exceptions, however, 30 explicit awareness is typically polled at the end of the study. Here, we provided participants with 31 either an explicit spatial strategy or no instructions prior to learning. Early in learning, explicit 32 instructions greatly reduced movement errors but also resulted in increased trial-to-trial 33 variability and longer reaction times. Late in adaptation, performance was indistinguishable 34 between the explicit and implicit groups, but the mechanisms underlying performance 35 improvements remained fundamentally different, as revealed by catch trials. The progression of 36 implicit recalibration in the explicit group was modulated by the use of an explicit strategy: these 37 participants showed a lower level of recalibration as well as decreased after-effects. This 38 phenomenon may be due to the reduced magnitude of errors made to the target during 39 adaptation, or inhibition of implicit learning mechanisms by explicit processing. 40 41

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تاریخ انتشار 2011