Reducing bias in auditory duration reproduction by integrating the reproduced signal.

Reducing bias in auditory duration reproduction by integrating the reproduced signal.
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DOI:
10.1371/journal.pone.0062065
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发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Müller HJ
Müller HJ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Shi Z;Ganzenmüller S;Müller HJ

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已知持续时间估计远非真实,并且在感觉估计和运动再现方面有所不同。为了研究如何整合这些差异估计来估计或再现持续时间,并检查持续时间比较和再现任务中的感觉运动偏差,我们比较了三种不同的持续时间估计任务:感知比较、运动再现和听觉再现(即组合的感知-运动任务)的估计偏差和方差。我们发现在运动和感知-运动-听觉复制任务中存在一致的高估,而在比较任务中存在最小的高估。更有趣的是,与单纯的动作再现相比,听觉再现任务中的高估偏差减少了,因为有额外的再现听觉信号。我们进一步操纵反馈/比较音调中的信噪比(SNR)来检查估计偏差和方差的变化。将知觉偏差和运动偏差作为两个独立的组成部分,应用基于信度的模型,成功地预测了听觉再现中的偏差。因此,我们的研究结果为大脑如何将运动和感知信息结合在一起以减少持续时间估计偏差和提高估计可靠性提供了行为证据。
Duration estimation is known to be far from veridical and to differ for sensory estimates and motor reproduction. To investigate how these differential estimates are integrated for estimating or reproducing a duration and to examine sensorimotor biases in duration comparison and reproduction tasks, we compared estimation biases and variances among three different duration estimation tasks: perceptual comparison, motor reproduction, and auditory reproduction (i.e. a combined perceptual-motor task). We found consistent overestimation in both motor and perceptual-motor auditory reproduction tasks, and the least overestimation in the comparison task. More interestingly, compared to pure motor reproduction, the overestimation bias was reduced in the auditory reproduction task, due to the additional reproduced auditory signal. We further manipulated the signal-to-noise ratio (SNR) in the feedback/comparison tones to examine the changes in estimation biases and variances. Considering perceptual and motor biases as two independent components, we applied the reliability-based model, which successfully predicted the biases in auditory reproduction. Our findings thus provide behavioral evidence of how the brain combines motor and perceptual information together to reduce duration estimation biases and improve estimation reliability.
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