Cite as:
Smith R A, Cass P, 1986, "Facilitatory interactions between flashed lines" Perception 15(4) 443 – 460
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Facilitatory interactions between flashed lines

Robert A Smith, Peter Cass

Received 7 February 1985, in revised form 21 June 1986

Abstract. The detectability of pairs of flashed lines was investigated as a joint function of their separation in both space and time. In contrast to previous studies of contrast interactions as a function of either spatial or temporal separation alone, the predominant interaction is not lateral inhibition, but a delayed facilitation. A quantitative model based on probability summation between lateral-inhibitory detectors does not appear able to account for these results. Two related explanations are suggested: either a motion detection system or the nonlinear 'transient' subsystem is being tapped.

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