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Related Experiment Videos

Can response preparation begin before stimulus recognition finishes?

J Miller

    Journal of Experimental Psychology. Human Perception and Performance
    |April 1, 1983
    PubMed
    Summary
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    Human information processing allows response preparation to begin only after stimulus recognition is complete, supporting discrete coding models over continuous ones. This finding clarifies the timing of cognitive processes in stimulus identification and response selection.

    Area of Science:

    • Cognitive Psychology
    • Human Information Processing
    • Neuroscience

    Background:

    • The debate between discrete and continuous models of human information processing concerns the timing of cognitive events.
    • Understanding when response preparation can begin relative to stimulus recognition is crucial for resolving this debate.

    Purpose of the Study:

    • To investigate if preliminary stimulus information can initiate response preparation before complete recognition.
    • To test predictions from discrete versus continuous models regarding response preparation timing.

    Main Methods:

    • Experiments used stimulus sets designed to separate preliminary and secondary information extraction.
    • Discriminability of secondary information and precues were manipulated to control response preparation opportunities.

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  • Response preparation was assessed by observing keypress responses.

    • Main Results:

    • Evidence for response preparation based on preliminary information was found with certain stimulus sets.
    • The degree of response preparation varied with the difficulty of secondary discriminations.
    • Precues influenced response preparation differently depending on secondary discrimination difficulty.

    Conclusions:

    • Results support the asynchronous discrete coding model, suggesting response preparation starts after stimulus categorization.
    • Complete stimulus recognition is necessary before response preparation can commence.
    • Findings contribute to understanding the sequential nature of cognitive processing.