Integration of shape and texture in haptic search V van Polanen, W Bergmann Tiest, A Kappers |
|---|
Faculty of Human Movement Sciences, VU University Amsterdam, Netherlands
|
| With both visual and haptic search tasks, the efficiency of the processing of object properties can be investigated. In this study, we used a 3D haptic search task in which participants had to grasp a bunch of items. We examined whether shape and texture information could be integrated. More specifically, if a target differs both in shape and texture from the distractors, performance might improve compared to targets that differ only on a single property. Experiment 1 investigated this question in three search conditions. Distractors were always rough cubes, and the target was either a rough sphere, a smooth cube or a smooth sphere. Results showed lower reaction times in the combined (smooth sphere) condition compared to both single cue conditions. This indicates that the two properties can be integrated. Experiment 2 investigated whether participants searched simultaneously for the two properties, or for the combined concept. Reaction times were not lower in a condition with two targets (a rough sphere and a smooth cube; both properties separate) compared to the search for a smooth sphere (both properties combined), even though in the latter condition the chance to find a target was lower. However, there were also some individual differences. [This work was supported by the European Commission with the Collaborative Project no. 248587, “THE Hand Embodied”. ] |
| Up Home |
|---|