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Related Experiment Videos

Stimulus-set location does not affect orthogonal stimulus-response compatibility.

Yang Seok Cho1, Robert W Proctor

  • 1Department of Psychological Sciences, Purdue University, W. Lafayette, IN 47907-2081, USA. yscho@psych.purdue.edu

Psychological Research
|November 25, 2003
PubMed
Summary
This summary is machine-generated.

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Stimulus-response compatibility (SRC) effects are influenced by response factors, not stimulus location. Experiments show stimulus-set position does not affect orthogonal SRC, supporting response-related processing accounts.

Area of Science:

  • Cognitive Psychology
  • Human Factors
  • Neuroscience

Background:

  • Orthogonal stimulus-response compatibility (SRC) effects are observed when stimuli and responses vary along independent dimensions.
  • Existing theories primarily attribute SRC effects to response-related processes, such as hand posture and response location.
  • The influence of stimulus-set position on orthogonal SRC remains less understood.

Purpose of the Study:

  • To investigate whether stimulus-set position influences orthogonal SRC, similar to response location.
  • To test the hypothesis that stimulus-related factors, not just response-related factors, impact SRC.
  • To differentiate between stimulus- and response-based explanations of SRC.

Main Methods:

  • Two experiments were conducted using two-choice tasks with orthogonal stimulus and response dimensions.

Related Experiment Videos

  • Stimulus-set position was manipulated along the stimulus dimension (vertical or horizontal).
  • Response modes, hand posture, and response eccentricity were controlled or varied across experiments.

    • Main Results:

    • An advantage for mapping 'up' with 'right' and 'down' with 'left' responses was consistently observed across different response modes.
    • Manipulation of stimulus-set position along the stimulus dimension had no significant influence on the orthogonal SRC effect.
    • The findings indicate that stimulus-set position does not modulate orthogonal SRC.

    Conclusions:

    • The lack of stimulus-set position effect supports theories emphasizing response-related processes in orthogonal SRC.
    • The results align with the multiple asymmetric codes account, suggesting stimulus code polarity is stable, while response code polarity varies.
    • Orthogonal SRC is primarily driven by response characteristics rather than stimulus spatial arrangement.