Abstract
Resolution thresholds at 0° (fovea), 20°, 40°, and 60° along the horizontal meridian of the temporal visual field revealed a characteristic degradation in visual resolution with increasing stimulus eccentricity. However, substantial individual differences were found, particularly at 40° and 60° of eccentricity. Dramatic improvements in peripheral visual resolution occurred over a period of 11 practice sessions, with the time course of practice effects increasing for greater visual field eccentricities. Improvements with practice reduced, but did not eliminate, individual differences. The present visual resolution findings are compared to previous studies of peripheral motion detection and increment thresholds.
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Johnson, C. A.Improvement with practice on peripheral motion discrimination: A look for attentional fluctuations, sensitivity and criterion effects. Paper presented at the 1974 meeting of the Eastern Psychological Association. Philadelphia, Pennsylvania.
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This research was performed in the Department of Psychology at Pennsylvania State University, ans was supported by Grant MH08061 from the National Institute of Mental Health.
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Johnson, C.A., Leibowitz, H.W. Practice effects for visual resolution in the periphery. Perception & Psychophysics 25, 439–442 (1979). https://doi.org/10.3758/BF03199854
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DOI: https://doi.org/10.3758/BF03199854