Detecting deception in pain expressions: the structure of genuine and deceptive facial displays
Detecting deception in pain expressions: the structure of genuine and deceptive facial displays
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DOI：
10.1016/s0304-3959(02)00037-4
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发表时间：
2002-07-01
期刊：
影响因子：
7.4
通讯作者：
Craig, KD
中科院分区：
文献类型：
--
作者：
Hill, ML;Craig, KD
在判断疼痛的部位和严重程度时，临床医生倾向于给予非语言表达比患者的自我报告更大的权重。判断可能会歪曲实际经验，因为患者可以成功地改变他们的疼痛表达。本研究提供了一个基础，通过扩大面部表情的详细说明，包括以前未经检验的变量，包括研究的时间模式和连续性的面部动作，以及发生特定的欺骗线索，区分真正的和欺骗性的疼痛表情。下背部患者（n = 40）的面部表情在休息时和进行痛苦的直腿抬高时被录像，并被指示：（1）真实地表达他们的疼痛，或（2）假装不疼。同时，他们被要求假装疼痛而不动。面部动作编码系统被用来描述和量化面部活动。不同类型的表情的频率，类型，强度，时间模式和连续性的面部动作，以及对特定的欺骗线索的频率进行了比较。研究结果证实了区分面部表情的困难，但表明，虚假的疼痛表情显示了更多的疼痛相关和非疼痛相关的行动，有更长的峰值强度和整体持续时间，观察到的面部行动往往是时间上的连续性比那些真正的疼痛表情。掩蔽疼痛和中性表情之间的差异是微妙的，与更大的频率开口和残留的眉毛运动掩蔽疼痛的表情。因此，有一个经验的基础，区分真正的和欺骗性的面部表情。(C)2002年国际疼痛研究协会。由Elsevier Science B.V.出版，版权所有。
Clinicians tend to assign greater weight to non-verbal expression than to patients' self-report when judging the location and severity of pain. Judgments can misrepresent the actual experience because patients can successfully alter their pain expressions. The present research provides a basis for discriminating genuine and deceptive pain expressions by expanding detailed accounts of facial expressions to include previously unexamined variables, including study of temporal patterns and contiguity of facial actions as well as the occurrence of specific deception cues. Low back patients' facial expressions (n = 40) were videotaped at rest and while undergoing a painful straight leg raise with instructions to: (1) genuinely express their pain, or (2) pretend that it did not hurt. As well, they were asked to fake pain without moving. The Facial Action Coding System was used to describe and quantify facial activity. The different types of expression were compared on the frequency, type, intensity, temporal pattern and contiguity of facial actions, as well as on the frequency of specific deception cues. Findings confirmed the difficulty of discriminating the facial expressions, but indicated that faked pain expressions show a greater number of pain-related and non-pain-related actions, have a longer peak intensity and overall duration, and the facial actions observed tend to be less temporally contiguous than are those in genuine pain expressions. The differences between masked pain and neutral expressions were subtle, with a greater frequency of mouth opening and residual eyebrow movement in masked pain expressions. Thus, there is an empirical basis for discriminating genuine and deceptive facial displays. (C) 2002 International Association for the Study of Pain. Published by Elsevier Science B.V. All rights reserved.