Department of Psychology, University of Alberta.
J Exp Psychol Learn Mem Cogn. 2020 Dec;46(12):2314-2339. doi: 10.1037/xlm0000794. Epub 2019 Dec 2.
This study investigated when the Bayesian cue combination of piloting and path integration occurs in human homing behaviors. The Bayesian cue combination was hypothesized to occur in estimating the home location or self-localization. In Experiment 1, the participants learned the locations of 5 objects (1 located at the learning position) in the presence of distal landmarks before walking a 2-leg path without viewing the landmarks and objects. At the end of the path, the participants indicated the original locations of the objects in 4 cue conditions: (a) path integration only, (b) landmarks only where the participants were disoriented and the landmarks reappeared, (c) both path integration and the reappearing landmarks, and (d) path integration and conflicting landmarks rotated 45°. The participants' heading, position, and homing estimations were calculated. The ratio of the length of the second leg to that of the first leg was manipulated to be 0.5, 1, or 2. The results showed evidence of the Bayesian cue combination for heading estimates in all leg ratios, and for homing estimates in a small leg ratio (0.5) but not in a large leg ratio (2). The following experiments replicated the results of the Bayesian cue combination for heading but not for homing estimates for the large leg ratio (2) when participants did a typical homing task without learning the locations of objects (Experiment 2) and when proximal landmarks replaced distal landmarks (Experiments 3-4). These findings suggest that the Bayesian cue combination occurs in self-localization prior to homing. (PsycInfo Database Record (c) 2021 APA, all rights reserved).
本研究探讨了贝叶斯线索组合在人类归巢行为中何时发生。假设贝叶斯线索组合发生在估计归巢位置或自我定位时。在实验 1 中，参与者在行走没有观察地标和物体的两段路径之前，在存在远距离地标时学习 5 个物体（1 个位于学习位置）的位置。在路径的尽头，参与者在 4 种线索条件下指示物体的原始位置：（a）仅路径集成，（b）参与者迷失方向且地标重新出现时仅地标，（c）路径集成和重新出现的地标，以及（d）路径集成和冲突的地标旋转 45°。计算参与者的航向、位置和归巢估计。第二腿的长度与第一腿的长度之比被操纵为 0.5、1 或 2。结果表明，在所有腿比中，对航向估计存在贝叶斯线索组合的证据，在小腿比（0.5）中对归巢估计存在证据，但在大腿比（2）中不存在。在以下实验中，当参与者在没有学习物体位置的情况下进行典型的归巢任务时（实验 2）以及当近端地标代替远端地标时（实验 3-4），复制了贝叶斯线索组合对于大腿比（2）的航向但不是归巢估计的结果。这些发现表明，贝叶斯线索组合在归巢前发生在自我定位中。（PsycInfo 数据库记录（c）2021 APA，保留所有权利）。
