Fear perception: Can objective and subjective awareness measures be dissociated?
Fear perception: Can objective and subjective awareness measures be dissociated?
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DOI：
10.1167/7.4.10
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发表时间：
2007-01-01
影响因子：
1.8
通讯作者：
Pessoa, Luiz
中科院分区：
文献类型：
--
作者：
Szczepanowski, Remigiusz;Pessoa, Luiz
鉴于以往的研究恐惧的脸知觉探索视觉意识根据客观或主观的标准，在本研究中，我们探讨了知觉的简要介绍和掩盖恐惧的面孔，通过评估这两种类型的知觉在同一个任务。在一个共同的信号检测理论框架内，客观和主观的敏感性措施进行了评估。为了评估单个参与者的意识，我们采用了行为数据的非参数受试者工作特征（ROC）分析，其中包括在多个会话中收集大量试验。我们的研究结果显示，几乎所有的科目都可以可靠地检测到17毫秒的恐惧脸的目标，从而表现出上述机会的客观感知在这个目标的持续时间。可靠的主观灵敏度也观察到33毫秒的恐惧脸的目标，对于一些科目，甚至为17毫秒的目标。单届数据的分析表明，以前的实验可能缺乏足够的统计能力，以建立上述机会的表现。总之，我们的研究结果与根据客观和主观标准分离的恐惧感知是一致的，这可以对每个参与者进行评估。这种解离区的确定可能有助于理解与意识和无意识的恐惧感知相关的条件。
Whereas previous studies of fearful-face perception have probed visual awareness according to either objective or subjective criteria, in the present study, we probed the perception of briefly presented and masked fearful faces by assessing both types of perception within the same task. Both objective and subjective sensitivity measures were assessed within a common signal detection theory framework. To evaluate single-participant awareness, we employed a nonparametric receiver operating characteristic (ROC) analysis of the behavioral data, which involved collecting a large number of trials over multiple sessions. Our findings revealed that nearly all subjects could reliably detect 17-ms fearful-face targets, thus exhibiting above-chance objective perception at this target duration. Reliable subjective sensitivity was also observed for 33-ms fearful-face targets and, for some subjects, even for 17-ms targets. The analysis of single-session data suggests that previous experiments may have lacked sufficient statistical power to establish above-chance performance. Taken together, our findings are consistent with a dissociation of fear perception according to objective and subjective criteria, which could be assessed for each individual participant. The determination of such a dissociation zone may help in understanding the conditions linked to aware and unaware fear perception.