Pointing to an allocentric and egocentric remembered target.
Pointing to an allocentric and egocentric remembered target.
复制标题
指向一个非中心和自我中心的记忆目标。
DOI：
10.1123/mcj.8.1.16
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发表时间：
2004
期刊：
影响因子：
1.1
通讯作者：
Stelmach,GeorgeE
中科院分区：
文献类型：
--
作者：
Lemay,Martin;Bertram,ChristopherP;Stelmach,GeorgeE
指向一个在移动之前消失的视觉目标需要保持关于目标位置的记忆表征。事实证明，目标可以以自我中心的方式、分配中心的方式或同时在两个参考系中存储。本研究的主要目标是比较的准确性和运动学的指向运动记住的目标时，以自我为中心，allocentric，或结合自我和allocentric编码是可能的。任务是定位，记忆，并达到一个记住的目标。条件1是“无背景”条件，涉及在完全黑暗的环境中呈现目标（自我中心条件）。对于另外2个条件，目标呈现在由照明的正方形提供的视觉背景中。条件2是“静止语境”条件，涉及在整个试验期间将语境保持在相同位置（自我中心和/或非自我中心编码）。条件3是一个“移动的上下文”的条件，涉及转移的背景下，在回忆延迟（allocentric编码）的不同位置。移动上下文和静止上下文条件下的运动精度和运动学结果惊人地相似。这些结果表明，当allocentric和自我中心的编码是可能的，allocentric的策略。
Pointing to a visual target that disappears prior to movement requires the maintenance of a memory representation about the location of the target. It has been shown that a target can be stored egocentrically, allocentrically, or in both frames of reference simultaneously. The main goal of the present study was to compare the accuracy and kinematics of a pointing movement to a remembered target when egocentric, allocentric, or combined egocentric and allocentric coding was possible. The task was to localize, memorize, and reach to a remembered target. Condition 1 was the “no-context” condition and involved presenting the target in a completely dark environment (egocentric condition). For 2 other conditions, the target was presented within a visual context provided by an illuminated square. Condition 2 was the “stationary-context” condition and involved keeping the context at the same position during the whole trial (egocentric and/or allocentric coding). Condition 3 was a “moved-context” condition that involved shifting the context to a different location during the recall delay (allocentric coding). Movement accuracy and kinematics results were strikingly similar for the moved-context and stationary-context conditions. These results suggest that when both allocentric and egocentric coding are possible, an allocentric strategy is used.