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A Dual Task Procedure Combined with Rapid Serial Visual Presentation to Test Attentional Blink for Nontargets
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Published on: December 5, 2014

Parallel response selection disrupts sequence learning under dual-task conditions.

Eric H Schumacher1, Hillary Schwarb

  • 1School of Psychology, Georgia Institute of Technology, Atlanta, GA 30332-0170, USA. eschu@gatech.edu

Journal of Experimental Psychology. General
|April 29, 2009
PubMed
Summary
This summary is machine-generated.

Dual-task processing can hinder sequence learning when central cognitive processes overlap. This occurs when tasks demand similar processing, unlike situations with distinct bottlenecks.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Performance

Background:

  • Conflicting findings exist regarding dual-task processing's impact on sequence learning.
  • Previous studies often used suboptimal secondary tasks, obscuring the precise interference mechanisms.

Purpose of the Study:

  • To investigate the specific nature of cognitive interference disrupting sequence learning during dual-task performance.
  • To identify the central processing overlaps that lead to sequence learning deficits.

Main Methods:

  • Employed serial reaction time (SRT) tasks combined with varied secondary tasks.
  • Utilized a psychological refractory period procedure with the SRT task as the secondary task in one experiment.
  • Compared learning outcomes under conditions of parallel versus bottleneck interference.

Main Results:

  • Parallel-interfering central processing was found to disrupt sequence learning (Experiments 1 & 2).
  • Disrupting SRT task performance via a response-selection bottleneck did not impair sequence learning (Experiment 3).

Conclusions:

  • Sequence learning deficits in dual-task scenarios arise from the overlap of central cognitive processes required by concurrent tasks.
  • The type of interference (parallel vs. bottleneck) critically determines whether sequence learning is impaired.