Figure 4
From: Idiosyncratic selection of active touch for shape perception
Idiosyncratic hand movements. (A) Three examples of three subjects’ hand trajectories while they explored the same shape (L). Top, subject EV; middle: subject AG, bottom, subject AS. Left: x–y plots for two sequential trials with the same object. Right: x and y positions projections (y-axis) as a function of time (x-axis), with the two trials superimposed after appropriate down sampling (see Materials and Methods). (B) Mean similarity indices (mean ± SEM across participants, see “Materials and methods”) for subject-shape pairs and control pairs. (C) Each circle represents the median similarity index of one participant in either the first half of the trial or the second. Median similarity indices across all participants are represented by the diamond shape. First-half median values were significantly higher (p = 0.005).
