Summary: Pergamon
PII:
visionk's,, Vol. 36, No. 21, pp. 3479­3485, 1996
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Adaptation to Peripheral Flicker
STUART ANSTIS
Received 9 August1995; in revisedform 29 December1995
With strict fixation, a flickering disk presented in the peripheral retina rapidly appeared to lose
contrast and stop flickering, owing to adaptation. Subjects measured this adaptation by continually
adjusting the flicker amplitude of a peripherally viewed disk to hold itjust at threshold. Results: (1)
The contrast threshold for flicker increased logarithmically over time. (2) The slope of the temporal
decay function increased with eccentricity (1­16 deg) and with decreasing disk size (8 deg-
3.6 min arc). (3) M-scaling the stimulus size could abolish the dependence upon eccentricity for
small disks, but not completely for large disks. (4) The temporal decay rate increased with flicker
rate (3-15 Hz), as though each cycle of flicker elevated contrast threshold equally. Copyright 0
1996 Elsevier Science Ltd.
Adaptation Flicker Corticalmagnificationfactor Peripheralvision
INTRODUCTION

Source: Anstis, Stuart - Department of Psychology, University of California at San Diego

Collections: Biology and Medicine