Abstract
Evidence suggests that for close retinal areas a correlation in sensitivity exists between the areas. Correlations as a function of distance from fixation and between areas were studied. In Experiment I, both forms were equidistant from fixation and five different distances apart. In Experiment II, both forms fell on an imaginary line through fixation. The forms usually did not fall on equally sensitive areas as in Experiment I. Both experiments showed that accuracy was lower for two- than for one-form displays. Closer forms had the lowest accuracy, suggesting perhaps mutual contour masking. However, in the sense of an intratrial correlation, no significant relationships were found. These two types of independence were discussed in terms of contour masking and varying sensitivity.
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This research was supported by National Institutes of Health Grant MH-1206. This manuscript was submitted to the faculty of the Psychology Department at the University of Illinois in partial fulfillment of the requirements for the PhD degree.
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Collins, J.F. Independence of sensitivity on different foveal areas. Perception & Psychophysics 13, 212–216 (1973). https://doi.org/10.3758/BF03214129
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DOI: https://doi.org/10.3758/BF03214129