Purpose Adults with intellectual disabilities (ID) entering the legal system in the USA are at heightened risk of being incorrectly labeled as malingering. The Inventory of Legal Knowledge (ILK) was recently developed to assess response style of individuals undergoing competency to stand trial (CST) evaluations. The purpose of this paper is to present preliminary data on the utility of the ILK with adults with ID. Design/methodology/approach In total, 32 adults were recruited from an American day program for adults with ID. Using a simulation design, the first 24 participants were assigned to the honest responding group and the remaining eight were assigned to the fake bad group. The normative performance of the honest responding group was compared to established norms for adults without ID, the most efficient ILK cut-off score was examined, and convergent validity of the ILK and other malingering measures tested. Findings Compared to the established mean score, the recommended cut-off score, and two independent published samples of non-ID adults, the normative performance of the honest responding ID group was significantly lower. Analyses of area under the curve revealed that the ILK lacked sufficient ability to discriminate adults with ID instructed to respond honestly from those instructed to feign incompetence, and correlational analyses failed to support the convergent validity of the ILK in this sample. Research limitations/implications The present findings do not support the use of the ILK with adults with ID, even with adjusted cut scores. The development of novel malingering measures that can be used in the context of CST evaluations with adults with ID is needed. Originality/value The present study is the first to examine the psychometric properties of the ILK with adults diagnosed with ID and without concomitant psychiatric symptomatology.

中文翻译：

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法律知识清单（ILK）和智障成年人

目的进入美国法律体系的智障成年人（ID）冒着被错误标记为恶意广告的风险。最近开发了法律知识清单（ILK），以评估经历胜任审判能力（CST）评估的个人的响应方式。本文的目的是提供有关IDK成人ILK实用性的初步数据。设计/方法/方法总共有32名成年人从ID日成人计划的美国日计划中招募。使用模拟设计，将前24名参与者分配到诚实响应组，其余8名参与者分配到伪造不良组。将诚实回应组的规范表现与没有ID的成年人的既定规范进行比较，检查了最有效的ILK截止评分，以及ILK和其他欺诈措施的收敛效度。结果与建立的平均得分，推荐的临界得分和两个独立发表的非ID成人样本相比，诚实响应的ID组的规范表现明显较低。曲线下面积的分析显示，ILK缺乏足够的能力来区分ID指示的成人和诚实伪造的ID成年人，而相关分析未能支持该样本中ILK的收敛效度。研究的局限性/含义本研究结果不支持将IDK用于ID为成人的人，即使切割分数已调整。需要开发可用于成人ID的CST评估中的新型恶意攻击措施。