External and body-centered frames of reference in spatial memory: Evidence from touch
External and body-centered frames of reference in spatial memory: Evidence from touch
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DOI：
10.3758/bf03194860
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发表时间：
2004-01-01
期刊：
影响因子：
--
通讯作者：
Al-Attar, Z
中科院分区：
文献类型：
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作者：
Millar, S;Al-Attar, Z
这项研究报告了外部和以身体为中心的参考线索对不规则的触觉位置序列的空间编码的独立影响。其目的是通过使用一种不提供常规远端线索的通道来调查空间编码的性质。我们的方法分离并结合了身体中心和外部空间参考线索，用于不规则放置的位置，沿着凸起的路线扫描。破坏以身体为中心的位置参考，通过在测试阶段与呈现阶段不同地将地图定向到身体，在回忆中沿着路线定位位置的错误增加了一倍。当以身体为中心的编码中断时，通过给出指令使用周围的框架作为参考，添加外部参考，将误差降低到接近基线(无旋转)的水平。与基线相比，将外部参考线索添加到完整的(未移位的)以身体为中心的参考中，误差减半。这一结果与以下假设一致：准确的空间编码取决于来自不同来源的潜在参考线索的一致性。这一新发现表明，外部参照线索和以身体为中心的参照线索对空间编码具有独立的加性效应。位置的顺序在所有参考条件下都有显著的影响，这表明在路线上额外使用了偶然但独特的局部触摸线索。讨论考虑了这些结果的理论和实践意义。
The study reports independent effects of external and body-centered reference cues on spatial coding of an irregular sequence of haptic locations. The aim was to investigate the nature of spatial coding by using a modality that does not provide distal cues routinely. Our method isolates and combines body-centered and external spatial reference cues for irregularly placed locations, scanned along a raised-line route. Disrupting body-centered reference for the locations, by orienting the map differently to the body in the test phase than in the presentation phase, doubled errors in positioning the locations along the route in recall. Adding external reference, by giving instructions to use a surrounding frame for reference when body-centered coding was disrupted, reduced errors to near baseline (no-rotation) levels. Adding external reference cues to intact (not displaced) body-centered reference halved errors, as compared with the baseline. The results are consistent with the hypothesis that accurate spatial coding is determined by the congruence of potential reference cues from diverse sources. The new findings suggest that external and body-centered reference cues have independent additive effects on spatial coding. The sequence of locations had a significant effect in all the reference conditions, suggesting the additional use of fortuitous but distinctive local touch cues on the route. The discussion considers theoretical and practical implications of the results.