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Using immersive virtual reality and anatomically correct computer-generated characters in the forensic assessment of deviant sexual preferences

机译：在沉迷的性偏好的法医评估中使用沉浸式虚拟现实和解剖上正确的计算机生成的角色

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Penile plethysmography (PPG) is the gold standard for the assessment of sexual interests, especially among sex offenders of children. Nonetheless, this method faces some ethical limitations inherent to the nature of its stimuli and could benefit from the improvement of its ecological validity. The use of computer-generated characters (CGC) in virtual immersion for PPG assessment might help address these issues. A new application developed to design made-to-measure anatomically correct virtual characters compatible with the Tanner developmental stages is presented. The main purpose of this study was to determine how the virtual reality (VR) modality compares to the standard auditory modality on their capacity to generate sexual arousal profiles and deviance differentials indicative of sexual interests. The erectile responses of 22 sex offenders of children and 42 non-deviant adult males were recorded. While both stimulus modalities generated significantly different genital arousal profiles for sex offenders of children and non-deviant males, deviance differentials calculated from the VR modality allowed for significantly higher classification accuracy. Performing receiver operating characteristic analyses further assessed discriminant potential. Auditory modality yielded an area under the curve (AUC) of 0.79 (SE = 0.059) while CGC in VR yielded an AUC of 0.90 (SE = 0.052). Overall, results suggest that the VR modality allows significantly better group classification accuracy and discriminant validity than audio stimuli, which provide empirical support for the use of this new method for PPG assessment. Additionally, the potential use of VR in interventions pertaining to self-regulation of sexual offending is addressed in conclusion.
机译：阴茎体积描记法（PPG）是评估性兴趣，尤其是儿童性犯罪者中性兴趣的金标准。然而，这种方法面临其刺激性质固有的一些伦理学限制，并且可以从其生态有效性的改善中受益。在PPG评估的虚拟沉浸中使用计算机生成的字符（CGC）可能有助于解决这些问题。提出了一个新的应用程序，用于设计与Tanner开发阶段兼容的量身定制的解剖学正确虚拟字符。这项研究的主要目的是确定虚拟现实（VR）方式与标准听觉方式在生成性唤起特征和表示性兴趣的差异方面的能力相比如何。记录了22名儿童的性犯罪者和42名非偏离性成年男性的勃起反应。虽然两种刺激方式对儿童和非偏离性男性的性罪犯产生了明显不同的生殖器唤醒特征，但从VR方式计算出的偏差差异允许明显更高的分类准确性。进行接收机工作特性分析可进一步评估判别潜力。听觉模态产生的曲线下面积（AUC）为0.79（SE = 0.059），而VR中的CGC产生的AUC为0.90（SE = 0.052）。总体而言，结果表明，与声音刺激相比，VR方式可以显着提高分组分类的准确性和判别有效性，这为使用这种新方法进行PPG评估提供了经验支持。此外，总结了虚拟现实技术在与性犯罪自我调节有关的干预措施中的潜在用途。

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