Determinants of two-dimensional motion aftereffects induced by simultaneously- and alternately-presented plaid components

Darren Burke, Peter Wenderoth*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)


    Wenderoth, Bray and Johnstone [(1988) Perception, 17, 81-91) measured motion aftereffects induced on stationary vertical sine-wave gratings by horizontally drifting two-dimensional patterns (plaids). The adapting plaid component gratings were simultaneously or alternately presented and were oriented left and right of vertical by 15, 45 or 75°. It was found that aftereffects decreased linearly in the alternating conditions as the plaid component orientations changed but this was not the case in the simultaneous adaptation conditions, a finding taken to be consistent with the hypothesis that one-dimensional aftereffects have a low level site (possibly V1) whereas two-dimensional effects have a higher level site (possibly MT). In three experiments, we have examined in more detail the determinants of aftereffects induced by simultaneous and alternating plaid components. The data suggest that the mechanisms involved are more complex than those put forward by Wenderoth et al. and that plaid perception utilizes both higher and lower level processes which can be referred to, respectively, as an intersection of constraints algorithm and a moving "blob" detector.

    Original languageEnglish
    Pages (from-to)351-359
    Number of pages9
    JournalVision Research
    Issue number3
    Publication statusPublished - 1993


    • Plaid Motion aftereffect Intersection of constraints Coherent motion

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