Beneficial effects of ambiguous precues: Parallel motor preparation or reduced premotoric processing time?

Ines Jentzsch, H Leuthold, KA Ridderinkhof

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The present study was designed to investigate the mechanisms underlying movement preprogramming in situations where informative but ambiguous precue information is used. In a response preening task that involved flexi on or extension movements with the right or left index finger, a spatially compatible precue conveyed partial information about side, about direction, no parameter information (ambiguous condition), or no information at all. Advance movement preparation was indicated by reaction-time shortening for all informative precue conditions. The analysis of stimulus- and response-locked lateralized readiness potential onsets revealed a clear and exclusive motoric origin of the ambiguous-precue benefit. Additional analyses ruled out a strategic trial by trial choice of just one of the two ambiguous alternatives and provided evidence for a parallel preparation of both response alternatives when information only about direction or ambiguous precue information is provided.

Original languageEnglish
Pages (from-to)231-244
Number of pages14
JournalPsychophysiology
Volume41
Issue number2
DOIs
Publication statusPublished - Mar 2004

Keywords

  • movement preparation
  • preening paradigm
  • lateralized readiness potential
  • LRP
  • contingent negative variation
  • CNV
  • ambiguous precues
  • ADVANCE MOVEMENT PREPARATION
  • BRAIN POTENTIALS
  • LRP ONSET
  • RESPONSE FORCE
  • DIRECTION
  • INFORMATION
  • EXTENT
  • ARM
  • ATTENTION
  • OVERLAP

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