Audiovisual temporal order judgments
Audiovisual temporal order judgments
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DOI：
10.1007/s00221-003-1536-z
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发表时间：
2003-09-01
影响因子：
2
通讯作者：
Spence, C
中科院分区：
文献类型：
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作者：
Zampini, M;Shore, DI;Spence, C
在两个实验中，我们考察了视听时序判断(TOJ)受空间因素和时序判断维度的影响程度。在不同的刺激起始时间(SA)下，来自左侧和/或右侧注视的一对听觉和视觉刺激被呈现出来，受试者迅速地做出了关于哪一种模式最先呈现的TOJ。(实验1)，或者“哪一方最先出现？”(实验2)。当听觉和视觉刺激从不同的空间位置而不是从相同的位置呈现时，通道TOJ更准确(即，仅可察觉的差异，JND较小)，这突出了先前研究中固有的一个重要的潜在混淆。相反，无论两种刺激是否以不同的方式呈现，空间TOJ都不受影响。一项实验间的比较显示，对于相同的双峰刺激对，当人们报告哪个通道最先出现时，他们的表现比他们报告哪一边最先出现时更准确(即较小的JND)。这些结果表明，多感觉TOJ严重依赖于呈现刺激的相对空间位置和被判断的特定维度。
In two experiments, we examined the extent to which audiovisual temporal order judgments (TOJs) were affected by spatial factors and by the dimension along which TOJs were made. Pairs of auditory and visual stimuli were presented from either the left and/or right of fixation at varying stimulus onset asynchronies (SOAs), and participants made unspeeded TOJs regarding either 'Which modality was presented first?' (experiment 1), or 'Which side was presented first?' (experiment 2). Modality TOJs were more accurate (i.e. just-noticeable differences, JNDs, were smaller) when the auditory and visual stimuli were presented from different spatial positions rather than from the same position, highlighting an important potential confound inherent in previous research. By contrast, spatial TOJs were unaffected by whether or not the two stimuli were presented in different modalities. A between-experiments comparison revealed more accurate performance (i.e. smaller JNDs) when people reported which modality came first than when they reported which side came first for identical bimodal stimulus pairs. These results demonstrate that multisensory TOJs are critically dependent on both the relative spatial position from which stimuli are presented and on the particular dimension being judged.