Where did that noise come from? Memory for sound locations is exceedingly eccentric both in front and in rear space
Where did that noise come from? Memory for sound locations is exceedingly eccentric both in front and in rear space
复制标题
那噪音是从哪里来的？
DOI：
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发表时间：
2019
影响因子：
1.7
通讯作者：
Phillip McMurray
中科院分区：
文献类型：
--
作者：
F. Delogu;Phillip McMurray
很少有研究考察声源位置表征在空间工作记忆中的稳定性。本研究的目的是验证声音位置的记忆是否会随着维持时间的增加而下降。在两个实验中，我们测试了声音定位任务中刺激和反应之间的延迟的影响。在实验1中，被蒙上眼睛的参与者听突发的白色噪音起源于16个扬声器均匀地分布在一个360度的圆形空间周围的听众，这样的方式，鼻子是对齐的零度坐标。他们的任务是在不同的延迟（刺激偏移后0、3和6秒）提示时使用数字指针指示声音的位置。在实验2中，任务类似于Exp。1，刺激-反应延迟为0或10 s。两个实验的结果表明，将刺激反应延迟增加至10秒不会损害声音定位。参与者系统性地高估了听觉刺激的偏心率，将他们的反应转向90度坐标，与右耳对齐，或转向270度坐标，与左耳对齐。这种偏差在前方位角空间和后方位角空间中是类似的，并且仅受延迟条件的轻微影响。我们的结论是，在工作记忆中的听觉空间的表征是稳定的，但有方向性偏差与偏心率的系统高估。
Few studies have examined the stability of the representation of the position of sound sources in spatial working memory. The goal of this study was to verify whether the memory of sound position declines as maintenance time increases. In two experiments, we tested the influence of the delay between stimulus and response in a sound localization task. In Experiment 1, blindfolded participants listened to bursts of white noise originating from 16 loudspeakers equally spaced in a 360-degree circular space around the listener in such a way that the nose was aligned to the zero-degree coordinate. Their task was to indicate sounds’ position using a digital pointer when prompted at varying delays: 0, 3, and 6 s after stimulus offset. In Experiment 2, the task was analogous to Exp. 1 with stimulus–response delays of 0 or 10 s. Results of the two experiments show that increasing stimulus–response delays up to 10 s do not impair sound localization. Participants systematically overestimated the eccentricity of the auditory stimulus by shifting their responses either toward the 90-degree coordinate, in alignment with the right ear, or toward the 270-degree coordinate, in alignment with the left ear. Such bias was analogous in the front and in the rear azimuthal space and was only marginally influenced by the delay conditions. We conclude that the representation of auditory space in working memory is stable, but directionally biased with systematic overestimation of eccentricity.
影响因子：
14.5
作者：
Blakemore, SJ;Bristow, D;Ward, J
通讯作者：
Ward, J
影响因子：
2.4
作者：
MAKOUS, JC;MIDDLEBROOKS, JC
通讯作者：
MIDDLEBROOKS, JC