O'Toole B I, 1979, "Exposure-time and spatial-frequency effects in the tilt illusion" Perception 8(5) 557 – 564
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Exposure-time and spatial-frequency effects in the tilt illusion
Brian I O'Toole
Received 5 June 1978, in revised form 27 June 1979
Abstract. The exposure durations of a vertical test line and a tilted inducing grating were varied and the tilt illusion thus generated was found to change as a function of this variation. Significant direct effects (acute-angle expansion) and indirect effects (acute-angle contraction) were found to occur at times consistent with Andrews's estimate of the time course of inhibition in the visual system when the inducing grating had a spatial frequency of
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