Comparison of the predictions of models that implement gain control in retinal versus motor coordinates. A, C, Predictions of generative models that implement gain control on signals that are still in visual coordinates (A) or in motor coordinates (C). The connected symbols plot the predicted perturbation response functions during oblique baseline pursuit up and to the right. Each point is the end of a vector with a length that represents the magnitude of a predicted perturbation response and an angle that represents the direction of the perturbation response. Black and red symbols show predictions with and without a downstream motor bias that favors horizontal over vertical eye velocity. B, D, Fits of the retinal (B) and motor (D) models to the data from monkey U. Plots are as in Figure 3. Red and blue curves show the best fits of the two models. Black curves show the average data from an individual experiment (see Fig. 2C) in monkey U.