Bayesian integration of visual and vestibular signals for heading
Bayesian integration of visual and vestibular signals for heading
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DOI：
10.1167/10.11.23
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Buelthoff, Heinrich H.
中科院分区：
文献类型：
--
作者：
Butler, John S.;Smith, Stuart T.;Buelthoff, Heinrich H.
通过环境的自我运动涉及到诸如视觉和前庭线索等信号的复合。建立在以前的结果表明，视觉和前庭信号联合收割机结合在一个统计上最佳的方式，我们调查了视觉和前庭线索在自我运动的相对权重。该实验由三个实验条件组成：单独的前庭，单独的视觉（具有四个不同的标准航向值）和视觉前庭组合。在组合提示条件下，引入了感觉间冲突（Delta = +/-6度或+/-10度）。参与者在所有条件下进行了2个间隔的强迫选择任务，并被要求判断他们在两个间隔中的哪一个更向右移动。线索冲突条件揭示了与每种模态相关的相对权重。我们发现，即使在视觉和前庭线索之间存在相对较大的冲突时，参与者也表现出统计上最佳的方差减少。另一方面，我们发现，在单峰条件下的结果的模式并没有预测的权重组合线索条件。具体来说，视觉前庭线索组合预测的可靠性，而不是单独的每个线索，而是更多的权重给予前庭线索。
Self-motion through an environment involves a composite of signals such as visual and vestibular cues. Building upon previous results showing that visual and vestibular signals combine in a statistically optimal fashion, we investigated the relative weights of visual and vestibular cues during self-motion. This experiment was comprised of three experimental conditions: vestibular alone, visual alone (with four different standard heading values), and visual-vestibular combined. In the combined cue condition, inter-sensory conflicts were introduced (Delta = +/- 6 degrees or +/- 10 degrees). Participants performed a 2-interval forced choice task in all conditions and were asked to judge in which of the two intervals they moved more to the right. The cue-conflict condition revealed the relative weights associated with each modality. We found that even when there was a relatively large conflict between the visual and vestibular cues, participants exhibited a statistically optimal reduction in variance. On the other hand, we found that the pattern of results in the unimodal conditions did not predict the weights in the combined cue condition. Specifically, visual-vestibular cue combination was not predicted solely by the reliability of each cue, but rather more weight was given to the vestibular cue.