Abstract
Two letter-classification experiments that investigated target-redundancy effects on reaction time (RT) were conducted. Both experiments were replicated with choice reaction time (CRT) and go/no-go (GNG) procedures. In each experiment, there were two single-target conditions, one with a noise letter and one without. In one experiment, the letter classes were two letters that could be of either case. In the second experiment, each class consisted of two different capital letters. In both experiments, there were two redundant-targets conditions, one with identical targets and one with the different members of a class. In both of the GNG experiments, redundancy gains were obtained comparing the different-targets condition with the no-noise, single-target condition. Redundant stimuli are ones that lead to the same response. Visually different stimuli may be processed in parallel and jointly activate a response. GNG procedures are more sensitive than CRT in the investigation of redundancy effects.
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Eriksen, C. W., Goettl, B., St. James, J. D., &Fournier, L. R. (1989). Processing redundant signals: Coactivation, divided attention, or what?Perception & Psychophysics,45, 356–370.
Eriksen, C. W., &Schultz, D. W. (1979). Information processing in visual search: A continuous flow conception and experimental results.Perception & Psychophysics,25, 249–263.
Fournier, L. R., &Eriksen, C. W. (1990). Coactivation in the perception of redundant targets.Journal of Experimental Psychology: Human Perception & Performance,16, 538–550.
Grice, G. R. (1972). Conditioning and a decision theory of response evocation. In G. H. Bower (Ed.),The psychology of learning and motivation (Vol. 5). New York: Academic Press.
Grice, G. R., &Canham, L. (1990). Redundancy phenomena are affected by response requirements.Perception & Psychophysics,48, 209–213.
Grice, G. R., Canham, L., &Gwynne, J. W. (1984). Absence of a redundant-signals effect in a reaction time task with divided attention.Perception & Psychophysics,36, 565–570.
Grice, G. R., &Gwynne, J. W. (1987). Dependence of target redundancy effects on noise conditions and number of targets.Perception & Psychophysics,42, 29–36.
Miller, J. (1982). Divided attention: Evidence for coactivation with redundant signals.Cognitive Psychology,14, 247–279.
Mordkoff, J. T., Yantis, S., &Egeth, H. E. (1990). Detecting conjunctions of color and form in parallel.Perception & Psychophysics,48, 157–168.
Van Der Heijden, A. H. C., SChreuder, R., Maris, L., &Neerincx, M. (1984). Some evidence for correlated separate activation in a simple letter-detection task.Perception & Psychophysics,36, 577–585.
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This research was supported by PHS Grant MHI6400 from the National Institute of Mental Health.
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Grice, G.R., Reed, J.M. What makes targets redundant?. Perception & Psychophysics 51, 437–442 (1992). https://doi.org/10.3758/BF03211639
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DOI: https://doi.org/10.3758/BF03211639