Pantle A, Lehmkuhle S, Caudill M, 1978, "On the capacity of directionally selective mechanisms to encode different dimensions of moving stimuli" Perception 7(3) 261 – 267
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On the capacity of directionally selective mechanisms to encode different dimensions of moving stimuli
Allan Pantle, Steve Lehmkuhle, Michael Caudill
Received 24 May 1977, in revised form 5 December 1977
Abstract. Direction-specific losses of contrast sensitivity for sinusoidal test gratings as a function of the contrast of a sinusoidal adapting grating were found to be similar to those measured previously with square-wave gratings. Furthermore, both relationships were similar to that between motion aftereffect duration and the contrast of sinusoidal adapting gratings, and all three sets of data can be fit by a single function. The function shows that the magnitude of direction-specific adaptation effects increases linearly with the logarithm of adapting contrast in the low contrast region, but is essentially independent of contrast once the contrast exceeds threshold by more than a factor of five-six. In addition, it was found that direction-specific losses of contrast sensitivity are restricted to limited ranges of spatial frequency.
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