Gösta Ekmans Laboratorium, Department of Psychology, Stockholm University, Stockholm, Sweden.
Gösta Ekmans Laboratorium, Department of Psychology, Stockholm University, Stockholm, Sweden.
Conscious Cogn. 2020 Aug;83:102954. doi: 10.1016/j.concog.2020.102954. Epub 2020 May 30.
Research suggests that the electrophysiological correlates of consciousness are similar in hearing as in vision: the auditory awareness negativity (AAN) and the late positivity (LP). However, from a recently proposed signal-detection perspective, these correlates may be confounded by performance, as the strength of the internal responses differs between aware and unaware trials. Here, we tried to apply this signal-detection approach to correct for performance in an auditory discrimination and detection task (N = 28). A large proportion of subjects had to be excluded because even a small response bias distorted the correction. For the remaining subjects, the correction mainly increased noise in the measurement. Furthermore, the signal-detection approach is theoretically problematic because it may isolate post-perceptual processes and eliminate awareness-related activity. Therefore, we conclude that AAN and LP are not confounded by performance and that the contrastive analysis identifies both as correlates of awareness.
研究表明，意识的电生理相关性在听觉和视觉中是相似的：听觉意识负波（AAN）和晚期正波（LP）。然而，从最近提出的信号检测角度来看，这些相关性可能会因表现而混淆，因为在有意识和无意识试验之间，内部反应的强度不同。在这里，我们试图将这种信号检测方法应用于听觉辨别和检测任务（N=28）中，以纠正表现。由于即使很小的反应偏差也会扭曲校正，因此必须排除很大一部分受试者。对于其余的受试者，校正主要增加了测量中的噪声。此外，信号检测方法在理论上存在问题，因为它可能隔离后知觉过程并消除与意识相关的活动。因此，我们得出结论，AAN 和 LP 不受表现的影响，对比分析将两者都确定为意识的相关物。
