Fig. 3.

Psychometric curves for control experiments (Exp. 3–5). No significant difference between the pre and post-tool use psychometric curves were found for any control experiment: (a) Experiment 3, when tool use occurred in the absence of a mirror visual illusion; (b) Experiment 4, when participants viewed a mirror reflection of their arm holding a tool stationary; (c) Experiment 5, when participants viewed a mirror reflection of their hand picking up an object. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)