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- W2146440247 abstract "The goal of this study was to establish the spatial summation properties associated with inferred PC- and MC-pathway mediated psychophysical contrast discrimination. Previous work has established two paradigms that reveal characteristic signatures of these pathways. In the pulse paradigm, a four-square array was pulsed briefly, on a constant background. In the steady-pedestal paradigm, the stimulus array was presented continuously as a steady-pedestal within a constant surround. In both paradigms, one square differed from the others, giving the observer a forced choice spatial discrimination task. Area summation functions derived for the pulse paradigm decreased with area, with a slope of -0.25 on a log-log axis. Area summation functions derived for the steady-pedestal paradigm decreased as a power function of area, approaching an asymptote above one square degree. The latter are consistent with the classical data of threshold spatial summation." @default.
- W2146440247 created "2016-06-24" @default.
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- W2146440247 date "2001-07-01" @default.
- W2146440247 modified "2023-09-26" @default.
- W2146440247 title "Pulse and steady-pedestal contrast discrimination: effect of spatial parameters" @default.
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- W2146440247 doi "https://doi.org/10.1016/s0042-6989(01)00085-2" @default.
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