Abstract
Five choice reaction time experiments were conducted to investigate the redundant-signals effect in letter identification. In two experiments, displays were large letters formed by small letters. Three experiments used simple two-letter displays with different spatial arrangements. Data were analyzed by the measurement model of variable criterion theory. In all experiments, throughout the RT distributions, the strength of the redundant signals condition was an extremely precise linear function of the sum of the strengths of the separate components. Each stimulus component contributed about one-half of its strength. The form of the distribution was entirely determined by this additive relation. However, the superiority of the redundant-signals condition is not produced by this summation, but by an additive constant present throughout the distribution. It is suggested that this represents a decrement produced by a distractor in a relevant location in single-target conditions. The results strongly favor strength theory as opposed to separate activation models that account for the redundant-signals effect by statistical facilitation. Additional information provided concerns the global precedence effect and S-R compatibility.
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Duncan, J. (1980). The locus of interference in the perception of simultaneous stimuli.Psychological Review,87, 272–300.
Eriksen, B. A., &Eriksen, C. W. (1974). Effects of noise letters upon the identification of a target letter in a nonsearch task.Perception & Psychophysics,16, 143–149.
Eriksen, C. W., &Schultz, D. W. (1978). Temporal factors in visual information processing: A tutorial review. In J. Requin (Ed.),Attention and Performance VII. Hillsdale, NJ: Erlbaum.
Eriksen, C. W., &Schultz, D. W. (1979). Information processing in visual search: A continuous flow conception and experimental results.Perception & Psychophysics,25, 249–263.
Fidell, S. (1970). Sensory function in multimodel signal detection.Journal of the Acoustical Society of America,47, 1009–1015.
Flowers, J. H., &Wilcox, N. (1982). The effect of flanking context on visual classification: The joint contribution of interactions at different processing levels.Perception & Psychophysics,32, 581–591.
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, pp. 1–65). New York: Academic Press.
Grice, G. R., Canham, L., &Boroughs, J. M. (1983). Forest before trees? It depends where you look.Perception & Psychophysics,33, 121–128.
Grice, G. R., Canham, L., &Schafer, C. (1982). Development of associative and perceptual interference.Perception & Psychophysics,32, 375–387.
Grice, G. R., Nullmeyer, R., &Spiker, V. A. (1977). Application of variable criterion theory to choice reaction time.Perception & Psychophysics,22, 431–449.
Grice, G. R., Nullmeyer, R., &Spiker, V. A. (1982). Human reaction time: Toward a general theory.Journal of Experimental Psychology: General,111, 135–153.
Grice, G. R., &Spiker, V. A. (1979). Speed-accuracy tradeoff in choice reaction time: Within conditions, between conditions, and between subjects.Perception & Psychophysics,26, 118–126.
Grice, G. R., Spiker, V. A., &Nullmeyer, R. (1979). Variable criterion analysis of individual differences and stimulus similarity in choice reaction time.Perception & Psychophysics,25, 353–370.
Hull, C. L. (1939). The problem of stimulus equivalence in behavior theory.Psychological Review,25, 361–372.
Hull, C. L. (1943).Principles of behavior. New York: Appleton-Century.
Kahneman, D., Treisman, A., &Burkell, J. (1983). The cost of visual filtering.Journal of Experimental Psychology: Human Perception and Performance,9, 510–522.
Kinchla, R. A. (1974). Detecting target elements in multielement arrays: A confusability model.Perception & Psychophysics,15, 149–158.
Kinchla, R. A. (1977). The role of structural redundancy in the perception of visual targets.Perception & Psychophysics,22, 19–30.
Kinchla, R. A., &Collyer, C. E. (1974). Detecting a target letter in briefly presented arrays: A confidence rating analysis in terms of a weighted additive effects model.Perception & Psychophysics,16, 117–122.
Kinchla, R. A., Solis-Macias, V., &Hoffman, J. (1983). Attending to different levels of structure in a visual image.Perception & Psychophysics,33, 1–10.
Miller, J. (1981). Global precedence in attention and decision.Journal of Experimental Psychology: Human Perception and Performance,7, 1161–1174.
Miller, J. (1982). Divided attention: Evidence for coactivation with redundant signals.Cognitive Psychology,14, 247–279.
Navon, D. (1977). Forest before trees: The precedence of global features in visual perception.Cognitive Psychology,9, 353–383.
Raab, D. (1962). Statistical facilitation of simple reaction times.Transactions of the New York Academy of Sciences,24, 574–590.
Ratcliff, R. (1979). Group reaction time distributions and an analysis of distribution statistics.Psychological Bulletin,86, 446–461.
Santee, J. L., &Egeth, H. E. (1982). Do reaction time and accuracy measure the same aspects of letter recognition?Journal of Experimental Psychology: Human Perception and Performance,8, 489–501.
Shaw, M. L. (1982). Attending to multiple sources of information: 1. The integration of information in decision making.Cognitive Psychology,14, 353–409.
Treisman, A., Kahneman, D., &Burkell, J. (1983). Perceptual objects and the cost of filtering.Perception & Psychophysics,33, 527–532.
Wallace, R. J. (1971). S-R compatibility and the idea of a response code.Journal of Experimental Psychology,88, 354–360.
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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., Canham, L. & Boroughs, J.M. Combination rule for redundant information in reaction time tasks with divided attention. Perception & Psychophysics 35, 451–463 (1984). https://doi.org/10.3758/BF03203922
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DOI: https://doi.org/10.3758/BF03203922