Cite as:
Martin F, Lovegrove W, 1987, "Flicker contrast sensitivity in normal and specifically disabled readers" Perception 16(2) 215 – 221
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Flicker contrast sensitivity in normal and specifically disabled readers

Frances Martin, William Lovegrove

Received 25 May 1985, in revised form 7 February 1987

Abstract. Temporal contrast sensitivity for counterphase flicker was determined for specifically disabled and normal readers to investigate whether the two groups differ in the functioning of their transient systems. In experiment 1, temporal contrast sensitivity was measured over a range of temporal frequencies with a spatial frequency of 2 cycles deg^-1. Disabled readers were less sensitive than the control subjects at all temporal frequencies. In experiment 2, temporal contrast sensitivity was measured at a temporal frequency of 20 Hz over a range of spatial frequencies. Disabled readers were less sensitive than the controls at all spatial frequencies, with the differences between the groups increasing as spatial frequency increased. Both these findings are interpreted as supporting the hypothesis of a transient-system deficit in the visual systems of disabled readers.

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