Fig. 2
From: A visual illusion that influences perception and action through the dorsal pathway
Influence of embedded motion. Effect of the embedded motion on a the judged velocity, and b the judged position. a, b Squares: fraction of trials on which MS judged the comparison patch to move faster or to disappear closer to the fixation point than the standard patch. Thick curves: fitted psychometric functions. The psychometric curves for controls are plotted for comparison (dashed curves: BK; thin curves: young controls, adapted from ref. 40). c The effect of embedded motion on tapping errors as a function of the effect predicted from the velocity judgments (positive is in the direction of target motion). A set of two symbols connected by a grey line represents an individual subject’s values for the two directions of embedded motion, averaged across the two velocities of the standard patch (see Methods). Filled squares: data for MS; disks: data for controls (filled: BK, open: young controls, adapted from ref. 40). All error bars are 95% confidence intervals for each point of subjective equality (PSE) calculated using parametric bootstrapping with 1000 samples
