Smooth pursuit eye movements: is perceived motion necessary?

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Science  30 Mar 1979:
Vol. 203, Issue 4387, pp. 1361-1363
DOI: 10.1126/science.424761


It has recently been shown that perceived motion, in the absence of any appropriate retinal motion, is a sufficient stimulus to generate smooth pursuit eye motions. This raises the question of whether perceived motion is necessary for pursuit. In three experiments we obtained a negative answer to this question: retinal motion always governed pursuit.