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Related Experiment Videos

Structure and process in semantic memory: new evidence based on speed-accuracy decomposition.

J Kounios, A M Osman, D E Meyer

    Journal of Experimental Psychology. General
    |March 1, 1987
    PubMed
    Summary

    New speed-accuracy decomposition methods reveal continuous information accumulation in semantic memory, supporting computational models. Occasional discrete search processes may also influence sentence verification.

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    Area of Science:

    • Cognitive Psychology
    • Neuroscience
    • Computational Linguistics

    Background:

    • Traditional reaction-time and accuracy data in sentence verification studies are insufficient for understanding human semantic memory.
    • Theoretical questions about semantic memory structures and processes remain unanswered due to data limitations.

    Purpose of the Study:

    • To introduce and validate the speed-accuracy decomposition technique for analyzing sentence verification.
    • To investigate the nature of processes and memory structures involved in human semantic memory.

    Main Methods:

    • Application of speed-accuracy decomposition (Meyer et al., 1986) across three experiments.
    • Precise analysis of intermediate products during sentence verification tasks.
    • Examination of reaction-time minima to infer search process characteristics.

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    Main Results:

    • Sentence verification processes yield valuable partial information before completion.
    • Information accumulation appears continuous, with rates varying based on semantic category relatedness.
    • Evidence suggests that discrete, all-or-none search processes may also contribute to sentence verification.

    Conclusions:

    • Findings support continuous computational models of semantic memory, such as feature comparison.
    • The speed-accuracy decomposition technique offers enhanced precision for studying semantic memory.
    • Both continuous accumulation and discrete search mechanisms likely operate in sentence verification.