Abstract
Older adults (mean age: 67.9 years) judged whether two adjacent letters, presented either 0.5° (foveal or near condition) or 2.0° (parafoveal or far condition) from fixation, were identical or different. The method was identical to that used previously with young adults (Krueger, 1985). The older (and presumably noisier) adults were slower and less accurate in general, and, consistent with the internal-noise principle, they surpassed the young adults by showing a large, 48-msec fast-same effect and a large, 6% preponderance of false-different responses (i.e., errors onsame trials) over false-same ones. With parafoveal presentation, the fast-same effect, but not the preponderance of false-different responses, increased greatly for the older adults, apparently due to an inability to perceive differing features (Eriksen, O’Hara, & Eriksen s, 1982, missing-feature principle), owing to their more constricted visual fields (Cerella, 1985a). The fast-same effect was larger in the left visual field (right hemisphere) for young adults, but larger in the right visual field (left hemisphere) for older adults.
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Bagnara, S., Boles, D. B., Simion, F., &Umiltà, C. (1983). Symmetry and similarity effects in the comparison of visual patterns.Perception & Psychophysics,34, 578–584.
Botwinick, J. (1973).Aging and behavior: A comprehensive integration of research findings. New York: Springer.
Cerella, J. (1985a). Age-related decline in extrafoveal letter perception.Journal of Gerontology,40, 727–736.
Cerella, J. (1985b). Information processing rates in the elderly.Psychological Bulletin,98, 67–83
Chignell, M. H., &Krueger, L. E. (1984). Further evidence for priming in perceptual matching: Temporal, not spatial, separation enhances the fast-same effect.Perception & Psychophysics,36, 257–265.
Crossman, E. R F. W., &Szafran, J. (1956). Changes with age in the speed of information intake and discrimination.Experientia Supplementum,4, 128–135.
Danziger, W. L. (1980). Measurement of response bias in aging research. In L. W. Poon (Ed.),Aging in the 1980s Psychological issues (pp. 552–557) Washington, DC: American Psychological Association.
Davis, R., &Schmit, V. (1973). Visual and verbal coding in the interhemispheric transfer of information.Acta Psychologica,37, 229–240.
Egeth, H., &Epstein, J (1972) Differential specialization of the cerebral hemispheres for perception of sameness and difference.Perception & Psychophysics,12, 218–220.
Eriksen, C. W., O’Hara, W P., &Eriksen, B. A. (1982). Response competition effects insame-different judgments.Perception & Psychophysics,32, 261–270
Gregory, R. L. (1959). “Neurological noise” as a factor in aging.Proceedings of the Fourth Congress of the International Association of Gerontology,1, 314–324.
Krueger, L. E. (1978). A theory of perceptual matchingPsychological Review,85, 278–304.
Krueger, L. E. (1985) Effect of intermixed foveal and parafoveal presentation onsame-different judgments Evidence for a criterioninertia model.Perception & Psychophysics,37, 266–271
Krueger, L. E., &Chignell, M. H. (1985).Same-different judgments under high speed stress: Missmg-feature principle predominates in early processing.Perception & Psychophysics,38, 188–193
Krueger, L E., &Goti, R E. (1985) Effect of lateral masking and letter reversal onsame-different judgments.Bulletin of the Psychonomic Society,23, 185–188
Krueger, L E., &Shapiro, R G (1985) Effect of inteistimulus interval and heterogeneity of difference onsame-different judgments of visual patterns.Bulletin of the Psychonomit Society,23, 43–46
Layton, B (1975). Perceptual noise and agingPsychological Bulletin,82, 875–883
Lefton, L A., &Haber, R N (1974). Information extraction from different retinal locations.Journal of Experimental Psychology,102, 975–980.
Lindhoim, J. M., &Parkinson, S R (1983). An interpretation of age-related differences in letter-matching performancePerception & Psychophysics,33, 283–294
Polich, J M (1982) Hemispheric differences for visual search: Serial vs parallel processing revisitedNeuropsychologia,20, 297–307
Proctor, R W (1981). A unified theory for matching-task phenomenaPsychological Review,88, 291–326
Townsend, J T., &Ashby, F G (1983)Stochastic modeling of elementary psychological processes. New York. Cambridge University Press.
Vickers, D., Nettelbeck, T., &Willson, R J (1972) Perceptual indices of performance. The measurement of “inspection time” and “noise” in the visual system.Perception,1, 263–295.
Welford, A T. (1965) Performance, biological mechanisms and age. A theoretical sketch In A T Welford & J. E. Birren (Eds.),Behavior, aging and the nervous system (pp 3–20). Springfield, IL Thomas.
Welford, A T (1977) Motor performance In J. E Birren & K. W. Schale (Eds.),Handbook of the psychology of aging (pp. 450–496) New York Van Nostrand Reinhold
Wechsler, D (1981)Manual for the Wechsler Adult Intelligence Scale-Revised. New York Psychological Corporation.
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Krueger, L.E., Allen, P.A. Same-different judgments of foveal and parafoveal letter pairs by older adults. Perception & Psychophysics 41, 329–334 (1987). https://doi.org/10.3758/BF03208234
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DOI: https://doi.org/10.3758/BF03208234