Leal Sharon, Vrij Aldert, Fisher Ronald P, van Hooff Hannie
University of Portsmouth, Psychology Department, King Henry Building, King Henry I Street, Portsmouth, United Kingdom.
Acta Psychol (Amst). 2008 Sep;129(1):1-7. doi: 10.1016/j.actpsy.2008.03.015. Epub 2008 May 27.
Previous research has shown that suspects in real-life interviews do not display stereotypical signs of nervous behaviours, even though they may be experiencing high detection anxiety. We hypothesised that these suspects may have experienced cognitive load when lying and that this cognitive load reduced their tonic arousal, which suppressed signs of nervousness. We conducted two experiments to test this hypothesis. Tonic electrodermal arousal and blink rate were examined during task-induced (Experiment 1) and deception-induced cognitive load (Experiment 2). Both increased cognitive difficulty and deception resulted in decreased tonic arousal and blinking. This demonstrated for the first time that when lying results in heightened levels of cognitive load, signs of nervousness are decreased. We discuss implications for detecting deception and more wide-ranging phenomena related to emotional behaviour.
先前的研究表明，在现实生活中的讯问中，嫌疑人即便可能正处于高度的被察觉焦虑中，也不会表现出紧张行为的刻板迹象。我们推测，这些嫌疑人在说谎时可能经历了认知负荷，而这种认知负荷降低了他们的紧张性唤起，从而抑制了紧张迹象。我们进行了两项实验来检验这一假设。在任务诱导（实验1）和欺骗诱导的认知负荷（实验2）过程中，对紧张性皮肤电活动和眨眼频率进行了检测。认知难度增加和欺骗行为均导致紧张性唤起和眨眼频率降低。这首次证明，当说谎导致认知负荷增加时，紧张迹象会减少。我们讨论了这一结果对于欺骗检测以及与情绪行为相关的更广泛现象的启示。
