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Data repository to supplement paper - Sankaran N, Lueng J, Carlile S (2014). Effects of virtual speaker density and room reverberation on spatiotemporal thresholds of audio-visual motion coherence. Abstract: The present study examined the effects of spatial sound-source density and reverberation on the spatiotemporal window for audio-visual motion coherence. Three different acoustic stimuli were generated in Virtual Auditory Space: two acoustically “dry” stimuli via the measurement of anechoic head-related impulse responses recorded at either 1° or 5° spatial intervals (experiment 1), and a reverberant stimulus rendered from binaural room impulse responses recorded at 5° intervals in situ in order to capture reverberant acoustics in addition to head-related cues (experiment 2). A moving visual stimulus with invariant localization cues was generated by sequentially activating LED’s along the same radial path as the virtual auditory motion. Stimuli were presented at 25°/s, 50°/s and 100°/s with a random spatiotemporal offset between audition and vision. In a 2AFC task, subjects made a judgment of the leading modality (auditory or visual). No significant differences were observed in the spatiotemporal threshold (PSE) or the slope of psychometric functions (β) between all three acoustic conditions. Additionally, β was spatially invariant across velocity, suggesting a fixed spatial audio-visual integration window. Findings also suggest a key role for auditory de-reverberation in processing moving auditory stimuli and establish a perceptual measure for assessing the veracity of motion generated from finite and discreet locations.本数据集为配套学术论文的补充资料——Sankaran N、Lueng J、Carlile S（2014）《虚拟声源密度与房间混响对视听运动一致性时空阈值的影响》。该论文摘要如下：本研究探讨了空间声源密度与房间混响对视听运动一致性时空窗口的影响。研究团队在虚拟听觉空间（Virtual Auditory Space）中生成三类不同的声学刺激：两类声学“干”信号，分别通过采集空间间隔为1°或5°的无回响头部相关冲激响应（anechoic head-related impulse responses）得到（实验1）；以及一类混响声学刺激，通过原位采集空间间隔为5°的双耳房间冲激响应（binaural room impulse responses）生成，以在保留头部相关线索的同时捕捉混响声学特性（实验2）。研究通过沿与虚拟听觉运动相同的径向路径依次点亮发光二极管（LED），生成具备恒定定位线索的动态视觉刺激。刺激以25°/s、50°/s及100°/s的速度呈现，且视听模态间存在随机时空偏移。在二择一迫选任务（2AFC task）中，被试需判断领先的感知模态（听觉或视觉）。实验结果显示，三类声学条件下的时空阈值（PSE，主观相等点）与心理测量函数（psychometric functions）的斜率（β）均无显著差异。此外，β值在不同运动速度下均保持空间不变性，表明视听整合窗口为固定空间尺度。本研究结果同时提示，听觉去混响在动态听觉刺激处理中发挥关键作用，并为评估由有限离散位置生成的运动的真实性提供了一种感知测量手段。