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Related Experiment Videos

Programming time in serial tapping responses as a function of pathway constraint.

B Sidaway1, B Schoenfelder-Zohdi, B Moore

  • 1Department of Kinesiology, Louisiana State University, Baton Rouge 70803-7101.

Psychological Research
|January 1, 1990
PubMed
Summary
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Movement-pathway constraints significantly impact response-programming time. The study found that the size of the most constrained target, not its position, affected programming duration, suggesting online trajectory adjustments.

Area of Science:

  • Human motor control
  • Cognitive psychology
  • Reaction time studies

Background:

  • Response precision demands can influence movement initiation.
  • Previous research suggests movement-pathway constraints are critical in programming.
  • Sidaway et al. (1988) proposed programming time is linked to the most constrained target.

Purpose of the Study:

  • To investigate how movement-pathway constraints affect response-programming time.
  • To test the prediction that programming time depends on the target demanding greatest precision.
  • To examine the role of target size and position in imposing movement constraints.

Main Methods:

  • Experimental manipulation of accuracy demands using a linear series of three targets.
  • Varying subtended angles of targets to alter precision requirements.

Related Experiment Videos

  • Simple reaction-time paradigm where subjects struck targets with a stylus.

    • Main Results:

    • A significant effect of the size of the constraint on reaction time was observed.
    • The position of the most constrained target did not significantly affect reaction time.
    • Movement time analysis ruled out simple duration or velocity changes, suggesting online corrections.

    Conclusions:

    • The size of the movement constraint is a key factor in response-programming time.
    • Movement-pathway constraints influence the programming process, not just execution.
    • Results suggest an online trajectory-correction mechanism during movement execution.