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Related Experiment Videos

Automatic stimulus-response translation in dual-task performance

B Hommel1

  • 1Max Planck Institute for Psychological Research, D-80802 München, Germany. hommel@mpipf-muenchen.mpg.de

Journal of Experimental Psychology. Human Perception and Performance
|February 13, 1999
PubMed
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Dual-task performance is affected by response compatibility, challenging bottleneck models. Findings suggest stimulus-response translation occurs in parallel, not serially, during task switching.

Area of Science:

  • Cognitive Psychology
  • Human Performance
  • Neuroscience

Background:

  • Bottleneck models propose that stimulus-response translation for secondary tasks is delayed until primary response selection is complete.
  • These models predict no interference between secondary and primary tasks based on response or stimulus compatibility.
  • Previous research has not fully explored these compatibility effects under various dual-task conditions.

Purpose of the Study:

  • To investigate the impact of stimulus-response compatibility on primary-task performance in a dual-task setting.
  • To test the predictions of bottleneck models regarding the timing of stimulus-response translation.
  • To determine if secondary response activation occurs before primary response selection.

Main Methods:

  • Conducted five dual-task experiments pairing primary manual and secondary vocal tasks.

Related Experiment Videos

  • Manipulated compatibility between secondary and primary responses, and between secondary responses and primary stimuli.
  • Varied stimulus onset asynchrony, task speed requirements, and trial structure.

    • Main Results:

    • Significant effects of secondary-primary response compatibility on primary-task performance were observed.
    • Compatibility between the secondary response and primary stimulus also impacted primary-task performance.
    • These compatibility effects persisted even under conditions designed to favor serial processing (e.g., low stimulus onset asynchrony, non-speeded secondary task, separate trials).

    Conclusions:

    • Findings contradict bottleneck models by demonstrating significant interference effects.
    • Results support an automatic-translation hypothesis, suggesting stimulus-response translation occurs in parallel.
    • Secondary responses are activated prior to the completion of primary response selection, even when response selection is serial.