Lang Albert-Georg, Buchner Axel
Institut fur Experimentelle Psychologie, Heinrich-Heine-Universitat, 40225 Dusseldorf, Germany.
J Acoust Soc Am. 2008 Nov;124(5):3120-31. doi: 10.1121/1.2981041.
When setting interaural time differences and interaural intensity differences into opposition the measured trading ratio depends on which of the cues is adjusted by the listener. This paper provides some evidence that the different trading ratios may be an effect of a shift of attention toward the to-be-adjusted cue. The experiments consisted of two phases. In the compensation phase, participants canceled out the effect of one preset binaural cue by adjusting a compensatory value of the other cue until the sound was located in the center. In the localization phase participants assessed the virtual location of the sounds, again using the preset values of the fixed cue, but using the values of the other cue as previously adjusted. The sounds were no longer perceived as originating from the center. Instead, their perceived location was shifted back toward the location from which they appeared to originate before the adjustment. These findings suggest that during the compensation task the to-be-adjusted sound localization cue received an increased weight compared to the other cue. We propose shifts of attention between the cues as a mechanism that could account for this finding.
当将耳间时间差和耳间强度差设置为相反时，所测量的权衡比率取决于听众调整的是哪种线索。本文提供了一些证据表明，不同的权衡比率可能是注意力向待调整线索转移的结果。实验包括两个阶段。在补偿阶段，参与者通过调整另一个线索的补偿值来抵消一个预设双耳线索的影响，直到声音位于中心位置。在定位阶段，参与者再次使用固定线索的预设值，但使用之前调整过的另一个线索的值来评估声音的虚拟位置。声音不再被感知为来自中心。相反，它们的感知位置向调整前似乎发出声音的位置偏移。这些发现表明，在补偿任务期间，与另一个线索相比，待调整的声音定位线索获得了更大的权重。我们提出线索之间的注意力转移作为一种可以解释这一发现的机制。
