Centro de Investigación y Transferencia en Acústica (CINTRA), Universidad Tecnológica Nacional - Facultad Regional Córdoba, CONICET, 5000, Córdoba, Argentina.
Facultad de Psicología, Universidad Nacional de Córdoba, Argentina, 5000, Córdoba, Argentina.
Sci Rep. 2019 Jul 1;9(1):9476. doi: 10.1038/s41598-019-45755-2.
We analyse the effects of exploration feedback on reaching measures of perceived auditory peripersonal space (APS) boundary and the auditory distance perception (ADP) of sound sources located within it. We conducted an experiment in which the participants had to estimate if a sound source was (or not) reachable and to estimate its distance (40 to 150 cm in 5-cm steps) by reaching to a small loudspeaker. The stimulus consisted of a train of three bursts of Gaussian broadband noise. Participants were randomly assigned to two groups: Experimental (EG) and Control (CG). There were three phases in the following order: Pretest-Test-Posttest. For all phases, the listeners performed the same task except for the EG-Test phase where the participants reach in order to touch the sound source. We applied models to characterise the participants' responses and provide evidence that feedback significantly reduces the response bias of both the perceived boundary of the APS and the ADP of sound sources located within reach. In the CG, the repetition of the task did not affect APS and ADP accuracy, but it improved the performance consistency: the reachable uncertainty zone in APS was reduced and there was a tendency to decrease variability in ADP.
我们分析了探索反馈对感知听觉近体空间（APS）边界的到达测量和位于其中的声源的听觉距离感知（ADP）的影响。我们进行了一项实验，参与者必须通过小型扬声器来判断声源是否（或不）可及，并通过伸手去够来估计其距离（40 到 150 厘米，每 5 厘米一步）。刺激由三串高斯宽带噪声组成。参与者被随机分配到两个组：实验组（EG）和对照组（CG）。按照以下顺序进行三个阶段：预测试-测试-后测试。在所有阶段，听众都执行相同的任务，但 EG-Test 阶段除外，参与者伸手去触摸声源。我们应用模型来描述参与者的反应，并提供证据表明反馈显著降低了感知 APS 边界和位于可及范围内的声源 ADP 的响应偏差。在 CG 中，任务的重复没有影响 APS 和 ADP 的准确性，但它提高了性能的一致性：APS 中的可到达不确定性区域减少，ADP 的可变性有减少的趋势。
