The response time concealed information test (RT-CIT) can reveal that a person recognizes a relevant (probe) item among other, irrelevant items, based on slower responding to the probe compared to the irrelevant items. Therefore, if this person is concealing the knowledge about the relevance of this item (e.g., recognizing it as a murder weapon), this deception can be unveiled. Adding familiarity-related filler items to the task has been shown to substantially increase the validity of the method, but assumptions for this effect have never been tested before. In the present series of three experiments (N = 511), we tested several factors, most of which were found to indeed influence the enhancing effects of fillers. First, larger enhancement is achieved when a smaller proportion of fillers shares the response key with the target. Second, familiarity context does play a role in the enhancement, and the target sharing its response key with the familiarity-referring fillers leads to larger enhancement. Third, mere symbolic fillers (such as simple arrow-like characters) also lead to enhancement, but filler words without task-relevant meaning are not effective. Fourth, small visual differences (lettercase or underlining) between fillers and the rest of the items have no significant influence. All this provides justification for the original structure of the fillers and also demonstrates that the enhancement is highly generalizable: Fillers have a potential to improve the RT-CIT regardless of deception scenario, item types, or the examinee's language comprehension.

响应时间隐藏信息测试（RT-CIT）可以揭示一个人在其他不相关项目中识别出相关（探测）项目，基于与不相关项目相比对探测的响应较慢。因此，如果此人隐瞒了有关该物品相关性的知识（例如，将其识别为凶器），则这种欺骗行为可能会被揭穿。事实证明，在任务中添加与熟悉度相关的填充项可以大大提高该方法的有效性，但之前从未测试过这种效果的假设。在本系列的三个实验中（ N = 511），我们测试了几个因素，发现其中大多数确实会影响填料的增强效果。首先，当较小比例的填充剂与目标共享响应密钥时，可以实现更大的增强。其次，熟悉度背景确实在增强中发挥了作用，并且目标与熟悉度参考填充物共享其响应键会导致更大的增强。第三，单纯的象征性填充词（例如简单的箭头状字符）也能带来增强效果，但没有任务相关含义的填充词则无效。第四，填充物和其余项目之间的微小视觉差异（字母或下划线）没有显着影响。所有这些都为填充物的原始结构提供了合理性，并且还表明增强功能具有高度通用性：无论欺骗场景、项目类型或考生的语言理解能力如何，填充物都有可能提高 RT-CIT。