Evidence of separable spatial representations in a virtual navigation task
Evidence of separable spatial representations in a virtual navigation task
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DOI：
10.1037/0096-1523.31.6.1199
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发表时间：
2005-12-01
影响因子：
2.1
通讯作者：
Schönebeck, B
中科院分区：
文献类型：
--
作者：
Gramann, K;Müller, HJ;Schönebeck, B
三个实验研究了虚拟导航任务中的空间定向。受试者必须调整一个归巢向量，表示他们的结束位置相对于路径的原点。此外，被试更喜欢一个独特的自我中心或allocentric参考框架来解决任务。“转弯者”的反应就好像他们在路径转弯时通过心理旋转矢状轴（自我中心框架）采取了新的方向。相比之下，“非转向者”跟踪新的方向，但不采用它（非中心框架）。当被指示使用他们的非首选参考框架时，两组相对于他们的首选框架的反应准确性没有下降;即使当呈现基于自我或非自我中心坐标的反应格式时，在试验中不可预测的格式，两组都高度准确地反应。这些发现支持了在导航过程中共存的空间表征的假设。
Three experiments investigated spatial orientation in a virtual navigation task. Subjects had to adjust a homing vector indicating their end position relative to the origin of the path. It was demonstrated that sparse visual flow was sufficient for accurate path integration. Moreover, subjects were found to prefer a distinct egocentric or allocentric reference frame to solve the task. "Turners" reacted as if they had taken on the new orientation during turns of the path by mentally rotating their sagittal axis (egocentric frame). "Nonturners," by contrast, tracked the new orientation without adopting it (allocentric frame). When instructed to use their nonpreferred reference frame, both groups displayed no decline in response accuracy relative to their preferred frame; even when presented with reaction formats based on either ego-or allocentric coordinates, with format unpredictable on a trial, both groups responded highly accurately. These findings support the assumption of coexisting spatial representations during navigation.