Pagano C C, Fitzpatrick P, Turvey M T
Center for the Ecological Study of Perception and Action, University of Connecticut, Storrs 06269-1020.
Percept Psychophys. 1993 Jul;54(1):43-54. doi: 10.3758/bf03206936.
Subjects wielded occluded rods, with or without attached masses, and reported the distances reachable with their distal tips. Experiments 1-3 compared wielding about the wrist, the elbow, and the shoulder. Experiments 4 and 5 compared free wielding, using the whole arm, with wielding only about the wrist. The two comparisons, respectively, were of spatial and temporal variations in the rod's rotational inertia. Perceived extent was found to be constant in both comparisons. This constancy was tied to the inertia tensor Iij defined about a point that remains a fixed distance from the object during wielding--an invariant of the spatially and temporally dependent patterning of mechanical energy impressed upon the tissues of the body. Discussion focused on the reciprocal action and perception capabilities of multisegmented limbs, the tensorial relations in the neurobiology of dynamic touch, and the strategy of understanding perceptual constancy through invariants.
受试者挥舞着带有或不带有附加质量的遮挡杆，并报告其远端能够触及的距离。实验1 - 3比较了围绕手腕、肘部和肩部的挥舞情况。实验4和5比较了使用整个手臂的自由挥舞与仅围绕手腕的挥舞。这两组比较分别涉及杆的转动惯量在空间和时间上的变化。在这两组比较中，感知范围均被发现是恒定的。这种恒定性与围绕一个在挥舞过程中与物体保持固定距离的点所定义的惯性张量Iij相关——它是施加于身体组织上的机械能在空间和时间上相关模式的一个不变量。讨论集中在多节段肢体的相互作用和感知能力、动态触觉神经生物学中的张量关系，以及通过不变量理解感知恒定性的策略。
