Abstract:
:Varying short-range apparent motion (AM) stimulus displacements from 2.7 to 21.6 min it was found that VEP amplitudes varied as a function of the limits for short-range AM described using time-till-breakdown as a behavioural measure of AM strength. This VEP amplitude difference was, however, in the reverse direction to that predicted as the "motion" condition elicited lower VEP amplitude responses than the "non-motion" conditions (which did not significantly differ from each other). This direction of VEP amplitude difference was supported by an intensive study of a single subject. The "breakdown effect" enabled VEPs to be gathered during periods in which the subjective experience was of either coherent lateral motion, or breakdown (incoherent motion) without changing any stimulus parameter. The VEP component identified in expt 2, as predicted, was of lower amplitude during motion with respect to periods of breakdown. The results of these experiments are discussed in terms of describing motion and breakdown in short-range AM displays as "coherent" and "incoherent" motion, rather than as "motion" and "non-motion".
journal_name
Vision Resjournal_title
Vision researchauthors
Manning ML,Finlay DC,Fulham WRdoi
10.1016/0042-6989(91)90181-4subject
Has Abstractpub_date
1991-01-01 00:00:00pages
1865-74issue
11eissn
0042-6989issn
1878-5646pii
0042-6989(91)90181-4journal_volume
31pub_type
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