Schematic illustration of the experimental conditions.

<p>(A) viewing the mirror image of right hand: The subjects viewed the mirror image of their right hand holding a pencil. (B) viewing the right hand: The subjects viewed their right hand holding a pencil through transparent plastic. (C) viewing the left hand: The subjects viewed their left hand holding a pencil through transparent plastic. (D) viewing the mirror image of left hand: The subjects viewed the mirror image of their left hand holding a pencil. The hands covered with sliding boards are shown by white dashed lines on black background.