Abstract
The processing of visual information was investigated in the context of two visual search tasks. The first was a forced-choice task in which one of two alternative letters appeared in a visual display of from one to five letters. The second task included trials on which neither of the two alternatives was present in the display. Search rates were estimated from the slopes of best linear fits to response latencies plotted as a function of the number of items in the visual display. These rates were found to be much slower than those estimated in yes-no search tasks. This result was interpreted as indicating that the processes underlying visual search in yes-no and forced-choice tasks are not the same.
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This work is 0ased upon a portion of a doctoral dissertation submitted to Stannford University. The research was carried out under a National Institute of Mental Health Terminal Graduate Fellowship and was supported in part by National Aeronautics and Space Administration Grant NGR-05-020-244.
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Holmgren, J.E. Visual search in a forced-choice paradigm. Perception & Psychophysics 16, 253–258 (1974). https://doi.org/10.3758/BF03203938
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DOI: https://doi.org/10.3758/BF03203938