Abstract
An experiment was conducted to explore the temporal structure of set formation in a complex reaction time (RT) task. On each trial an instruction [I-event] was given telling Ss whether identity of color or form on a separately presented alternative display (A-event) was the dimension relevant on that trial. The A-event consisted of a pattern of four colored forms. The two forms on one side were matched for color and on the other side for form. S’s task was to depress one of two keys. The correct key was homolateral to the matched relevant dimension. The basic independent variable was the time interval separating the I- and A-events (ISI). At short ISIs, RT wasa linear function oflSI with slope equal to -0.5. RT was independent of the order in which the events occurred at short ISIs, although at longer ISIs (3 sec) RT was longer when the A-event followed the I-event. Also, RT was shorter at short ISIs when color was the relevant dimension rather than form. although this difference disappearedat longer ISIs. The results were discussed in relation to information processing models and previous research dealing with partialadvance information.
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Supported by NIMH Grant 12530-01 to the senior author. A version of this paper was presented at the 1967 convention of the Psychonomic Society. The authors wish to express their gratitude to Mrs. Martha Talley for her helpful comments and to Mr. Michael Hughes for his assistance in gathering the data.
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Bernstein, I.H., Segal, A.E.M. Set and temporal integration. Perception & Psychophysics 4, 233–236 (1968). https://doi.org/10.3758/BF03206308
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DOI: https://doi.org/10.3758/BF03206308