) Held R, Hein AV. Adaptation of disarranged hand-eye coordination contingent upon re-afferent stimulation. Percept Mot Skills 1958; 8: 87-90.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....and shaped by the the details of an agent s embodiment, but the complementary story about how practical activity plays a role in giving meaning to the particular experiences of, or perhaps the representations generated by, a given individual agent. Consider a classic experiment by Held and Hein [57]. In this experiment, two sets of kittens were raised in the dark, and only exposed to the light under very controlled conditions. When they were in the light, one set of kittens was allowed to roam freely, although each kitten from this first group was fitted with a harness, itself attached to a ....

....attended to) feelings which accom pany the particular mechanics underlying that motility. However, and this is the second thought, there ought to be differences in the particularities of grounding for differently abled individuals. We have seen an example of this already, in the kitten experiment [57] men tioned in section 3; this experiment suggests that a suciently severe congenital disability might indeed be accompanied by diculties in perceptual grounding, in attaching meaning to one s perceptual experience. Less dramatically, the experiment does suggest that there would be subtle ....

Held and Hein. Adaptation of disarranged hand-eye coordination contingent upon re-afferent stimulation. Perceptial Motor Skills, 8:87-90, 1958.

....the other for passive vision. When tested the kittens behaved normally when using the active eye but their visually guided behaviour was lost when only the passive eye was used. 3. The necessity of active vision for adaption and learning in humans was also demonstated by Held and Hein 1958 [59] in a number of optical rearrangement experiments. The results of the experiments have been verified several times [60] In these experiments the subjects view the world through a pair of goggles that optically displaced or rotated the field of view. In one experiment, the observer viewed his hand ....

R. Held and A. Hein,"Adaptation of disarranged hand-eye coordination contingent upon re-afferent stimulation",Perceptual and Motor Skills, 8, pp.87-90, 1958.

....throughout the movement. Such feedback could provide an error signal to an adaptive controller which prefers straight paths (see Section 1.5) There are other less theoretical reasons to expect that continuous feedback could have different effects than feedback restricted to the end of movement. Held and Hein (1958), showed the subjects wearing left shifting prism goggles exhibit a rightward post exposure bias in their pointing when the exposure phase included watching self produced motion. On the other hand, if during the exposure phase the arm is kept still, no adaptation is seen. More recently, Redding ....

....in one quick movement. The trial ended when finger movement ceased, independent of the location of the finger, at which point the target circle disappeared and a tone was sounded. Test trials served a dual purpose: the error in final position is used as a measure of end point adaptation (Held and Hein, 1958; Welch, 1971) and the shape of the trajectory is used to assess the effect of that adaptation on trajectory planning. Obstacle trials were identical to test trials, except that subjects were asked to move around an obstacle on their way to the target location. For obstacle trials the target was ....

Held, R. and Hein, A. (1958). Adaptation of disarranged hand-eye coordination contingent upon re-afferent stimulation. Perceptual and Motor Skills, 8.

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) Held R, Hein AV. Adaptation of disarranged hand-eye coordination contingent upon re-afferent stimulation. Percept Mot Skills 1958; 8: 87-90.

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