Hermens F, Gielen S, 2003, "Visual and haptic matching of perceived orientations of lines" Perception 32(2) 235 – 248
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Visual and haptic matching of perceived orientations of lines
Frouke Hermens, Stan Gielen
Received 2 May 2002, in revised form 1 October 2002; published online 5 December 2002
Abstract. In this study we investigated the perception and production of line orientations in a vertical plane. Previous studies have shown that systematic errors are made when participants have to match oblique orientations visually and haptically. Differences in the setup for visual and haptic matching did not allow for a quantitative comparison of the errors. To investigate whether matching errors are the same for different modalities, we asked participants to match a visually presented orientation visually, haptically with visual feedback, and haptically without visual feedback. The matching errors were the same in all three matching conditions. Horizontal and vertical orientations were matched correctly, but systematic errors were made for the oblique orientations. The errors depended on the viewing position from which the stimuli were seen, and on the distance of the stimulus from the observer.
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