Craddock Matt, Lawson Rebecca
School of Psychology, University of Liverpool, Eleanor Rathbone Building, Bedford Street South, Liverpool L69 7ZA, UK.
Perception. 2009;38(9):1355-76. doi: 10.1068/p6312.
Two experiments were carried out to examine the effects of dominant right versus non-dominant left exploration hand and left versus right object orientation on haptic recognition of familiar objects. In experiment 1, participants named 48 familiar objects in two blocks. There was no dominant-hand advantage to naming objects haptically and there was no interaction between exploration hand and object orientation. Furthermore, priming of naming was not reduced by changes of either object orientation or exploration hand. To test whether these results were attributable to a failure to encode object orientation and exploration hand, experiment 2 replicated experiment 1 except that the unexpected task in the second block was to decide whether either exploration hand or object orientation had changed relative to the initial naming block. Performance on both tasks was above chance, demonstrating that this information had been encoded into long-term haptic representations following the initial block of naming. Thus when identifying familiar objects, the haptic processing system can achieve object constancy efficiently across hand changes and object-orientation changes, although this information is often stored even when it is task-irrelevant.
进行了两项实验，以检验优势右手与非优势左手探索以及物体向左与向右方向对熟悉物体触觉识别的影响。在实验1中，参与者在两个阶段对48个熟悉物体进行命名。在通过触觉命名物体时没有优势手优势，并且探索手和物体方向之间没有交互作用。此外，物体方向或探索手的变化不会减少命名的启动效应。为了测试这些结果是否归因于未能编码物体方向和探索手，实验2重复了实验1，不同之处在于第二个阶段的意外任务是判断探索手或物体方向相对于初始命名阶段是否发生了变化。两项任务的表现均高于随机水平，表明在初始命名阶段之后，这些信息已被编码到长期触觉表征中。因此，在识别熟悉物体时，尽管这些信息在与任务无关时通常也会被存储，但触觉处理系统可以有效地在手部变化和物体方向变化中实现物体恒常性。
