Busey Thomas, Swofford Henry J, Vanderkolk John, Emerick Brandi
Department of Psychological and Brain Sciences, Indiana University, Bloomington, IN, USA.
U.S. Army Criminal Investigation Laboratory, Defense Forensic Science Center, Forest Park, GA, USA.
Forensic Sci Int. 2015 Jun;251:202-8. doi: 10.1016/j.forsciint.2015.03.028. Epub 2015 Apr 7.
Eye tracking and behavioral methods were used to assess the effects of fatigue on performance in latent print examiners. Eye gaze was measured both before and after a fatiguing exercise involving fine-grained examination decisions. The eye tracking tasks used similar images, often laterally reversed versions of previously viewed prints, which holds image detail constant while minimizing prior recognition. These methods, as well as a within-subject design with fine grained analyses of the eye gaze data, allow fairly strong conclusions despite a relatively small subject population. Consistent with the effects of fatigue on practitioners in other fields such as radiology, behavioral performance declined with fatigue, and the eye gaze statistics suggested a smaller working memory capacity. Participants also terminated the search/examination process sooner when fatigued. However, fatigue did not produce changes in inter-examiner consistency as measured by the Earth Mover Metric. Implications for practice are discussed.
采用眼动追踪和行为学方法评估疲劳对潜在指纹检验员工作表现的影响。在一项涉及精细检验决策的疲劳练习前后，测量了注视情况。眼动追踪任务使用了相似的图像，通常是之前查看过的指纹的横向反转版本，这样在保持图像细节不变的同时，尽量减少先前识别的影响。尽管受试者数量相对较少，但这些方法以及对注视数据进行细粒度分析的受试者内设计，仍能得出相当有力的结论。与疲劳对放射学等其他领域从业者的影响一致，行为表现随疲劳而下降，并且注视统计数据表明工作记忆容量变小。参与者在疲劳时也会更快地终止搜索/检验过程。然而，通过推土机距离度量法测量，疲劳并未导致检验员之间的一致性发生变化。文中讨论了对实际工作的启示。
