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Examining Bilingual Language Control Using the Stroop Task
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No Negative Priming Effect in the Manual Stroop Task.

Luke Mills1, Sachiko Kinoshita1,2, Dennis Norris3

  • 1Department of Cognitive Science, Macquarie University, Sydney, NSW, Australia.

Frontiers in Psychology
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PubMed
Summary

The negative priming effect in the Stroop task differs between oral and manual responses. This study replicates this discrepancy, finding the effect absent in manual tasks but present in oral tasks.

Keywords:
RT distribution analysisStroop taskconflict controlnegative priming effectresponse mode

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Area of Science:

  • Cognitive Psychology
  • Experimental Psychology

Background:

  • The negative priming effect, an increase in interference, is often assumed to be present in the Stroop task.
  • Neill (1977) originally found negative priming only in oral, not manual, Stroop tasks.

Purpose of the Study:

  • To investigate the discrepancy in negative priming effects between oral and manual Stroop tasks.
  • To identify confounding factors in previous manual Stroop experiments.
  • To analyze the negative priming effect across the entire reaction time distribution.

Main Methods:

  • Replication of Neill's (1977) findings under identical conditions.
  • Examination of response repetition confounds in manual Stroop tasks.
  • Analysis of negative priming effects across the full reaction time distribution.

Main Results:

  • The discrepancy between oral and manual Stroop tasks regarding negative priming was replicated.
  • Response repetition was identified as a confound in prior manual Stroop studies.
  • Negative priming was absent in the manual task's RT distribution but constant in the oral task's.

Conclusions:

  • Response modality significantly influences the negative priming effect in the Stroop task.
  • Previous findings of negative priming in manual Stroop tasks may be artifactual.
  • Conflict control mechanisms in the Stroop task appear to operate differently based on response mode.