University of Belgrade, Faculty of Philosophy, Department of Psychology, Belgrade, Serbia.
University of Zagreb, Faculty of Humanities and Social Sciences, Department of Linguistics, Zagreb, Croatia.
Psychiatr Danub. 2024 May;36(1):33-46. doi: 10.24869/psyd.2024.33.
The lexical-semantic impairments at different levels of semantic processing are often observed in Mild cognitive impairment (MCI). To better understand the nature of the lexical-semantic impairment in MCI, this study included two experiments: a sensory rating task and a lexical decision task. Twenty individuals diagnosed with MCI were recruited as well as eighty healthy subjects to serve as a control group. For the first time, the sensory ratings of words were collected in the MCI population and compared with ratings of the same words collected from the control population. Furthermore, the MCI patients showed impaired performance related to executive functioning and preserved long-term memory-related performance. Unlike most studies that found semantic deficits, we were able to observe the highly preserved aspect of knowledge both in terms of semantic and episodic memory. Also, we showed that this knowledge could be exploited in visual word recognition, proposing further use of visual lexical decision task to investigate not only sublexical but also semantic variables in the clinical population.
在轻度认知障碍 (MCI) 中，经常观察到不同语义处理水平的词汇语义损伤。为了更好地理解 MCI 中词汇语义损伤的性质，本研究包括两个实验：感觉评分任务和词汇判断任务。招募了 20 名被诊断为 MCI 的个体以及 80 名健康个体作为对照组。本研究首次在 MCI 人群中收集了单词的感觉评分，并将其与对照组中收集的相同单词的评分进行了比较。此外，MCI 患者表现出与执行功能相关的受损表现，而与长期记忆相关的表现则得以保留。与大多数发现语义缺陷的研究不同，我们能够观察到在语义和情景记忆方面高度保留的知识方面。此外，我们还表明，这种知识可以在视觉单词识别中得到利用，建议进一步使用视觉词汇判断任务来研究临床人群中的不仅是次词汇，还有语义变量。
