Abstract
In standard visual search experiments, observers search for a target item among distracting items. The locations of target items are generally random within the display and ignored as a factor in data analysis. Previous work has shown that targets presented near fixation are, in fact, found more efficiently than are targets presented at more peripheral locations. This paper proposes that the primary cause of this “eccentricity effect” (Carrasco, Evert, Chang, & Katz, 1995) is an attentional bias that allocates attention preferentially to central items. The first four experiments dealt with the possibility that visual, and not attentional, factors underlie the eccentricity effect. They showed that the eccentricity effect cannot be accounted for by the peripheral reduction in visual sensitivity, peripheral crowding, or cortical magnification. Experiment 5 tested the attention allocation model and also showed that RT X set size effects can be independent of eccentricity effects. Experiment 6 showed that the effective set size in a search task depends, in part, on the eccentricity of the target because observers search from fixation outward.
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Ahissar, M., &Hochstein, S. (1994). Spatial anisotropy in feature search performance and learning.Investigative Opthalmology & Visual Science,35, 2080.
Ball, K. K., Beard, B. L., Roenker, D. L., Miller, R. L., &Griggs, D. S. (1988). Age and visual search: Expanding the useful field of view.Journal of the Optical Society of America A,5, 2210–2219.
Ball, K. K., Owsley, C., &Beard, B. (1990). Clinical visual field perimetry underestimates visual field problems in older adults.Clinical Vision Science,5, 113–125.
Ball, K. K., Owsley, C, Sloane, M. E., Roenker, D. L., &Bruni, J. R. (1993). Visual attention problems as a predictor of vehicle crashes among older drivers.Investigative Ophthalmology & Visual Science,34, 3110–3123.
Ball, K. K., Roenker, D. L., &Bruni, J. R. (1990). Developmental changes in attention throughout adulthood. In J. T. Enns (Ed.),The development of attention: Research and theory (pp. 489–508). Amsterdam: Elsevier.
Bennett, S. C, &Wolfe, J. M. (1996). Serial search can proceed at 50 msec peritem.Investigative Opthalmology & Visual Science,37, S298.
Bryden, M. P., &Mondor, T. A. (1991). Attentional factors in visual field asymmetries.Canadian Journal of Psychology,45, 427–447.
Bursill, A. E. (1958). The restriction of peripheral vision during exposure to hot and humid conditions.Quarterly Journal of Experimental Psychology,10, 113–129.
Carrasco, M., &Chang, I. (1995). The interaction of objective and subjective organizations in a localization search task.Perception & Psychophysics,57, 1134–1150.
Carrasco, M., & Evert, D. L. (1991, November).The effect of target position in a conjunction visual search task. Paper presented at the annual meeting of the Psychonomic Society, San Francisco.
Carrasco, M., Evert, D. L., Chang, I., &Katz, S. M. (1995). The eccentricity effect: Target eccentricity affects performance on conjunction searches.Perception & Psychophysics,57, 1241–1261.
Carrasco, M., &Frieder, K. S. (1997). Cortical magnification neutralizes the eccentricity effect in visual search.Vision Research,37, 63–82.
Carrasco, M., & Katz, S. (1992, April).The effect of target position in a feature visual search task. Paper presented at the annual meeting of the Eastern Psychological Association, Boston.
Carrasco, M., McLean, T. L., & Frieder, K. S. (in press). Magnifying spatial frequency and orientation eliminates the eccentricity effect found in visual search. Vision Research.
Christman, S., & Naegele, P. (1995, November).Visual search as a function of retinal locus of target. Paper presented at the annual meeting of the Psychonomic Society, Los Angeles.
Chun, M. M., &Wolfe, J. M. (1996). Just say no: How are visual searches terminated when there is no target present?Cognitive Psychology,30, 39–78.
Cohen, A., &Ivry, R. B. (1989). Illusory conjunction inside and outside the focus of attention.Journal of Experimental Psychology: Human Perception & Performance,15, 650–663.
Cole, B. L., &Hughes, P. K. (1984). A field trial of attention and search conspicuity.Human Factors,26, 299–313.
Drasdo, N. (1991). Neural substrates and threshold gradients of peripheral vision. In J. J. Kulikowski, V Walsh, & I. J. Murray (Eds.),Limits of vision (Vol. 5, pp. 251 -265). Boca Raton, FL: CRC.
Duncan, J., &Humphreys, G. W. (1989). Visual search and stimulus similarity.Psychological Review,96. 433–458.
Duncan, J., Ward, R., &Shapiro, K. (1994). Direct measurement of attention dwell time in human vision.Nature,369, 313–314.
Efron, R., Yund, E. W., &Nichols, D. R. (1987). Scanning the visual fields without eye movements—A sex difference.Neuropsychologia,25, 637–644.
Efron, R., Yund, E. W., &Nichols, D. R. (1990). Serial processing of visual spatial patterns in a search paradigm.Brain & Cognition,12, 17–41.
Egeth, H. (1977). Attention and preattention. In G. H. Bower (Ed.),The psychology of learning and motivation (Vol. 11, pp. 277–320). New York: Academic Press.
Fiorentini, A., &Berardi, N. (1991). Limits in pattern discrimination: Central and peripheral factors. In J. J. Kulikowski, V Walsh, & I. J. Murray (Eds.),Limits of vision (Vol. 5, pp. 266–276). Boca Raton, FL: CRC.
Geisler, W. S., &Chou, K.-L. (1995). Separation of low-level and high-level factors in complex tasks: Visual search.Psychological Review,102, 356–378.
Graves, M. A., Ball, K. K., Cissell, G. M., West, R. E., Whorely, K., &Edwards, J. D. (1993). Auditory distraction results in functional visual impairment for some older drivers.Investigative Ophthalmology & Visual Science,34, 1418.
Grigsby, S. S. &Tsou, B. H. (1994). Grating and flicker sensitivity in the near and far periphery. Naso-temporal asymmetries and binocular summation.Vision Research,34, 2841–2848.
He, S. Cavanagh, P., &Intriligator, J. (1996). Attentional resolution and the locus of visual awareness.Nature,383, 334–337.
Hunt, S. M. J. (1994). MacProbe: A Macintosh-based experimenter’s workstation for the cognitive sciences.Behavior Research Methods, Instruments, & Computers,26, 345–351.
Ikeda, M., &Takeuchi, T. (1975). Influence of foveal load on the functional visual field.Perception & Psychophysics,18, 255–260.
Kinchla, R. A. (1974). Detecting target elements in multielement arrays: A confusability model.Perception & Psychophysics,15, 149–158.
Lee, D., Jung, E. S., &Chung, M. K. (1992). Isoresponse time regions for the evaluation of visual search performance in ergonomie interface models.Ergonomics,35, 243–252.
Levi, D. M., Klein, S. A., &Aitsebaomo, A. P. (1985). Vernier acuity, crowding and cortical magnification.Vision Research,25, 963–977.
Logan, G. (1978). Attention in character classification: Evidence for the automaticity of component stages.Journal of Experimental Psychology: General,107, 32–63.
Madden, D. J. (1992). Selective attention and visual search: Revision of an allocation model and application to age differences.Journal of Experimental Psychology: Human Perception & Performance,18, 821–836.
Mordkoff, J. T., &Egeth, H. (1993). Response time and accuracy revisited: Converging support for the interactive race model.Journal of Experimental Psychology: Human Perception & Performance,19, 981–991.
Nakayama, K., &Silverman, G. H. (1986). Serial and parallel processing of visual feature conjunctions.Nature,320, 264–265.
Palmer, J. (1995). Attention in visual search: Distinguishing four causes of a set size effect.Current Directions in Psychological Science,4, 118–123.
Previc, F. H., &Blume, J. L. (1993). Visual search asymmetries in three-dimensional space.Vision Research,33, 2697–2704.
Ratcliff, R. (1978). A theory of memory retrieval.Psychological Review,85, 59–108.
Remington, R., &Williams, D. (1986). On the selection and evaluation of visual display symbology: Factors influencing search and identification times.Human Factors,28, 407–420.
Rovamo, J., &Virsu, V. (1979). An estimation and application of the human cortical magnification factor.Experimental Brain Research,37, 495–510.
Saarinen, J. (1993). Shifts in visual attention at fixation and away from fixation.Vision Research,33, 1113–1117.
Sagi, D., &Julesz, B. (1985). Fast noninertial shifts of attention. Spasearches terminated when there is no target present?Cognitive Psychology,30, 39–78.
Cohen, A., &Ivry, R. B. (1989). Illusory conjunction inside and outside the focus of attention.Journal of Experimental Psychology: Human Perception & Performance,15, 650–663.
Cole, B. L., &Hughes, P. K. (1984). A field trial of attention and search conspicuity.Human Factors,26, 299–313.
Drasdo, N. (1991). Neural substrates and threshold gradients of peripheral vision. In J. J. Kulikowski, V Walsh, & I. J. Murray (Eds.),Limits of vision (Vol. 5, pp. 251 -265). Boca Raton, FL: CRC.
Duncan, J., &Humphreys, G. W. (1989). Visual search and stimulus similarity.Psychological Review,96. 433–458.
Duncan, J., Ward, R., &Shapiro, K. (1994). Direct measurement of attention dwell time in human vision.Nature,369, 313–314.
Efron, R., Yund, E. W., &Nichols, D. R. (1987). Scanning the visual fields without eye movements—A sex difference.Neuropsychologia,25, 637–644.
Efron, R., Yund, E. W., &Nichols, D. R. (1990). Serial processing of visual spatial patterns in a search paradigm.Brain & Cognition,12, 17–41.
Egeth, H. (1977). Attention and preattention. In G. H. Bower (Ed.),The psychology of learning and motivation (Vol. 11, pp. 277–320). New York: Academic Press.
Fiorentini, A., &Berardi, N. (1991). Limits in pattern discrimination: Central and peripheral factors. In J. J. Kulikowski, V Walsh, & I. J. Murray (Eds.),Limits of vision (Vol. 5, pp. 266–276). Boca Raton, FL: CRC.
Geisler, W. S., &Chou, K.-L. (1995). Separation of low-level and high-level factors in complex tasks: Visual search.Psychological Review,102, 356–378.
Graves, M. A., Ball, K. K., Cissell, G. M., West, R. E., Whorely, K., &Edwards, J. D. (1993). Auditory distraction results in functional visual impairment for some older drivers.Investigative Ophthalmology & Visual Science,34, 1418.
Grigsby, S. S., &Tsou, B. H. (1994). Grating and flicker sensitivity in the near and far periphery. Naso-temporal asymmetries and binocular summation.Vision Research,34, 2841–2848.
He, S., Cavanagh, P., &Intriligator, J. (1996). Attentional resolution and the locus of visual awareness.Nature,383, 334–337.
Hunt, S. M. J. (1994). MacProbe: A Macintosh-based experimenter’s workstation for the cognitive sciences.Behavior Research Methods, Instruments, & Computers,26, 345–351.
Ikeda, M., &Takeuchi, T. (1975). Influence of foveal load on the functional visual field.Perception & Psychophysics,18, 255–260.
Kinchla, R. A. (1974). Detecting target elements in multielement arrays: A confusability model.Perception & Psychophysics,15, 149–158.
Lee, D., Jung, E. S., &Chung, M. K. (1992). Isoresponse time regions for the evaluation of visual search performance in ergonomie interface models.Ergonomics,35, 243–252.
Levi, D. M., Klein, S. A., &Aitsebaomo, A. P. (1985). Vernier acuity, crowding and cortical magnification.Vision Research,25, 963–977.
Logan, G. (1978). Attention in character classification: Evidence for the automaticity of component stages.Journal of Experimental Psychology: General,107, 32–63.
Madden, D. J. (1992). Selective attention and visual search: Revision of an allocation model and application to age differences.Journal of Experimental Psychology: Human Perception & Performance,18, 821–836.
Mordkoff, J. T., &Egeth, H. (1993). Response time and accuracy revisited: Converging support for the interactive race model.Journal of Experimental Psychology: Human Perception & Performance,19, 981–991.
Nakayama, K., &Silverman, G. H. (1986). Serial and parallel processing of visual feature conjunctions.Nature,320, 264–265.
Palmer, J. (1995). Attention in visual search: Distinguishing four causes of a set size effect.Current Directions in Psychological Science,4, 118–123.
Previc, F. H., &Blume, J. L. (1993). Visual search asymmetries in three-dimensional space.Vision Research,33, 2697–2704.
Ratcliff, R. (1978). A theory of memory retrieval.Psychological Review,85, 59–108.
Remington, R., &Williams, D. (1986). On the selection and evaluation of visual display symbology: Factors influencing search and identification times.Human Factors,28, 407–420.
Rovamo, J., &Virsu, V. (1979). An estimation and application of the human cortical magnification factor.Experimental Brain Research,37, 495–510.
Saarinen, J. (1993). Shifts in visual attention at fixation and away from fixation.Vision Research,33, 1113–1117.
Sagi, D., &Julesz, B. (1985). Fast noninertial shifts of attention.Spatial Vision,1, 141–149.
Sanders, A. F. (1970). Some aspects of the selective process in the functional visual field.Ergonomics,13, 101–117.
Sanders, A. F. (1993). Processing information in the functional visual field. In G. d’Ydewalle & J. Van Rensbergen (Eds.),Perception and cognition: Advances in eye movement research (pp. 3–22). Amsterdam: Elsevier.
Sanders, A. F., &Brück, R. (1991). The effect of presentation time on the size of the visual lobe.Bulletin of the Psychonomic Society,29, 206–208.
Schwartz, E. L. (1977). Spatial mapping in primate sensory projection: Analytic structure and relevance to perception.Biological Cybernetics,25, 181–194.
Scialfa, C. T., Kline, D. W., &Lyman, B. J. (1987). Age differences in target identification as a function of retinal location and noise level: Examination of the useful field of view.Psychology & Aging,2, 14–19.
Toet, A., &Levi, D. M. (1992). The two-dimensional shape of spatial interaction zones in the parafovea.Vision Research,32, 1349–1357.
Townsend, J. T. (1971). A note on the identifiability of parallel and serial processes.Perception & Psychophysics,10, 161–163.
Townsend, J. T. (1976). Serial and within-stage independent parallel model equivalence on the minimum completion time.Journal of Mathematical Psychology,14, 219–239.
Townsend, J. T. (1990). Serial and parallel processing: Sometimes they look like Tweedledum and Tweedledee but they can (and should) be distinguished.Psychological Science,1, 46–54.
Treisman, A. (1993). The perception of features and objects. In A. Baddeley & L. Weiskrantz (Eds.),Attention: Selection, awareness, and control (pp. 5–35). Oxford: Oxford University Press, Clarendon Press.
Treisman, A., &Gelade, G. (1980). A feature-integration theory of attention.Cognitive Psychology,12, 97–136.
Treisman, A., &Sato, S. (1990). Conjunction search revisited.Journal of Experimental Psychology: Human Perception & Performance,16, 459–478.
Treisman, A. M., &Schmidt, H. (1982). Illusory conjunctions in the perception of objects.Cognitive Psychology,14, 107–141.
Weltman, G., &Egstrom, G. H. (1966). Perceptual narrowing in novice divers.Human Factors,8, 499–506.
Williams, L. J. (1982). Cognitive load and the functional field of view.Human Factors,24, 683–692.
Williams, L. J. (1985). Tunnel vision induced by a foveal load manipulation.Human Factors,27, 221–227.
Wilson, H. R., Levi, D., Maffei, L., Rovamo, J., &Devalois, R. (1990). The perception of form: Retina to striate cortex. In L. Spillman & J. S. Werner (Eds.),Visual perception: The neurophysiologicalfoundations (pp. 231–272). San Diego: Academic Press.
Wolfe, J. M. (1992). “Effortless” texture segmentation and “parallel” visual search are not the same thing.Vision Research,32, 757–763.
Wolfe, J. M. (1994). Guided Search 2.0: A revised model of visual search.Psychonomic Bulletin & Review,1, 202–238.
Wolfe, J. M., Cave, K. R., &Franzel, S. L. (1989). Guided Search: An alternative to the feature integration model for visual search.Journal of Experimental Psychology: Human Perception & Performance,15, 419–433.
Wolfe, J. M., &Gancarz, G. (1996). Guided Search 3.0: A model of visual search catches up with Jay Enoch 40 years later. In V Lakshminarayanan (Ed.),Basic and clinical applications of vision science, (pp. 189–192). Dordrecht: Kluwer.
Yund, E. W., Efron, R., &Nichols, D. R. (1990). Detectability gradients as a function of target location.Brain & Cognition,12, 1–16.
Zohary, E., &Hochstein, S. (1989). How serial is serial processing in vision?Perception,18, 191–200.
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This research was supported by NIH-NEI EYO5087 and AFOSR 49620-93-1-0407 to J.M.W. and by a NIH-NRSA Postdoctoral Fellowship to P.O.
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Wolfe, J.M., O’Neill, P. & Bennett, S.C. Why are there eccentricity effects in visual search? Visual and attentional hypotheses. Perception & Psychophysics 60, 140–156 (1998). https://doi.org/10.3758/BF03211924
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DOI: https://doi.org/10.3758/BF03211924