Active detection of solid-shape information by touch and vision

Five groups of Ss were tested under conditions of intra- and intermodal equivalence matching for free-form unfamiliar shapes originally designed by Gibson. Findings indicated that visual intramodal matching was superior to intermodal matching, a result consistent with previous research. The order of accuracy in forming equivalence was: (1) intramodel visual, (2) intramodal haptic, (3) haptic to visual, (4) visual to haptic. A difference, but not a significant one, in accuracy occurred for intramodal haptic matching when Ss wore goggles and when they did not.

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