Cross-modal visuo-tactile matching in a patient with a semantic disorder

Repetition priming and the haptic recognition of familiar and unfamiliar objects

“…Only Lawson (in press) and Forti and Humphreys (2005) have tested recognition of familiar objects following orientation changes. Lawson (in press) found orientation-sensitive performance, but she only tested plastic scale models of real objects.…”

“…As Newell et al (2001) observed, an intuitive suggestion might be that the haptic representation of objects would be omnidirectional, since the thumbs and fingers of each hand can contact different sides of an object simultaneously, whereas the eyes can only see one side of an object at once. However, four recent studies have all indicated that haptic object recognition is sensitive to orientation (Forti & Humphreys, 2005;Lacey, Peters, & Sathian, 2007;Lawson, in press;Newell et al, 2001). Newell et al (2001) compared visual and haptic recognition of unfamiliar stimuli constructed from stacked plastic bricks.…”

“…Second, do familiar objects have preferred, canonical orientations when being recognized haptically, as is found visually (Palmer et al, 1981)? Forti and Humphreys (2005) specified that objects were felt in canonical and noncanonical orientations, but they did not test whether the canonical orientation was better recognized haptically. In addition, Forti and Humphreys's data came from a single neuropsychological case study, so it is important to test a large group of non-brain-damaged participants to establish the generality of their results.…”

“…Research has indicated that haptic object recognition may also display orientation sensitivity (Forti & Humphreys, 2005;Lawson, in press;Newell, Ernst, Tjan, & Bülthoff, 2001). In the present article, we investigate the susceptibility of the haptic system to manipulations of orientation and consider how this might inform our understanding of the mechanisms of object recognition in both visual and haptic modalities.…”

“…In the present article, we investigate the susceptibility of the haptic system to manipulations of orientation and consider how this might inform our understanding of the mechanisms of object recognition in both visual and haptic modalities. Although the terms view and viewpoint have been used previously in haptic studies (Forti & Humphreys, 2005;Newell et al, 2001), their meanings are not clearly specified in a haptic context. However, what constitutes a "view" depends on the orientation of the object with respect to the observer for both haptics and vision, so here the term orientation will be used.…”