Fig. 4.

Longer-term effect of speed context on target speed estimation. Left: the diagram illustrates the blend of target speeds used in the fast-context, slow-context, and control blocks. In A–D, each graph summarizes data across many experiments. Green and blue symbols show data obtained during the fast- and slow-speed contexts, respectively. Each symbol plots eye speed in response to 10°/s target motion for the high-contrast target vs. that for the low-contrast target. Values were normalized to eye speed for the same target motion during the control blocks. In A and B, the visual stimuli were of mixed forms: a high-contrast patch of dots and a low-contrast grating. In C and D, the visual stimuli were matched in form. A and C: monkey Re. B and D: monkey Xt.