Figure 1.

(a) Schematic depiction of three successive trials in the animations task. 37 participants watched videos from the database and rated the extent to which each video depicted mocking, seducing, surprising, following, or fighting. (b) Example trajectory of an animation stimulus. Each participant used a touchscreen device to create their own triangles animations. For each animation (both observed and generated by participants) we calculated jerk as the mean of the third order non-null derivative of the raw positional data across all frames; jerk similarity was calculated as the difference in mean jerk between an animation stimulus and the participant’s own animation of the same word (jerk difference). Depicted is an example of a following animation (one triangle’s trajectory).