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Related Experiment Videos

How much is an icon worth?

G R Loftus, C A Johnson, A P Shimamura

    Journal of Experimental Psychology. Human Perception and Performance
    |February 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Icons following brief picture presentations are worth about 100 ms of additional exposure time. This finding suggests icons and stimuli engage similar information encoding processes for memory.

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    Area of Science:

    • Cognitive Psychology
    • Visual Perception
    • Human-Computer Interaction

    Background:

    • Understanding how users extract information from visual stimuli is crucial.
    • Quantifying the informational value of icons following brief image presentations remains a challenge.

    Purpose of the Study:

    • To develop and apply a novel technique for measuring the information gained from icons.
    • To determine the equivalent physical exposure duration of a picture that an icon represents.

    Main Methods:

    • Participants viewed briefly presented pictures followed by an icon, or longer pictures without icons.
    • Memory performance was assessed using three distinct test types across four picture sets.
    • Variations in stimulus duration and luminance were controlled to isolate the icon's effect.

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    Main Results:

    • Approximately 100 ms more physical exposure was needed for equivalent memory performance when icons were absent.
    • This 100 ms equivalence was consistent across different base durations, luminances, memory tests, and picture sets.
    • Picture luminance confirmed the prediction that encoding processes affect icon and stimulus information identically.

    Conclusions:

    • An icon provides an informational value equivalent to roughly 100 ms of additional picture exposure.
    • This equivalence suggests that icons and physical stimuli utilize shared underlying neural encoding mechanisms.
    • The findings have implications for interface design and optimizing information transfer in visual displays.