Humans increasingly rely more on haptics in 3D shape perception with higher degrees of visual-haptic conflict

Priyamvada Tripathi, Robert Gray, Mithra Vankipuram, Sethuraman Panchanathan
Poster
Last modified: 2008-05-09

Abstract


We investigated the relative weight placed on touch and vision in the exploration of three dimensional shapes by humans in cases of conflict. Stimuli consisted of 3D renderings of a rigid shape that varied from a sphere to a cube. Intermediate shapes were varied from 25% to 75% range in the empty space between the cube and sphere. The haptic stimuli consisted of the same objects rendered using the Phantom® joystick. Ten participants performed a 2AFC judgment (“more like a sphere� or “more like a cube�) in three main conditions: (1) vision only (2) touch only (3) vision and touch both. Conflicts were introduced between vision and touch ranging from no conflict (delta = 0) to maximum conflict (delta = ±4). The results indicate that in cases of zero conflict the relative weighting of each modality is roughly equal, but as the conflict increases participants increasingly rely more on their haptic sense rather than vision to make the shape judgment.

Conference System by Open Conference Systems & MohSho Interactive Multimedia