Effects of facial expressions on visual short-term memory in relation to alexithymia traits
Effects of facial expressions on visual short-term memory in relation to alexithymia traits
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面部表情对与述情障碍相关的视觉短期记忆的影响
DOI：
10.1016/j.paid.2015.04.010
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发表时间：
2015
影响因子：
4.3
通讯作者：
J.
中科院分区：
文献类型：
--
作者：
Takahashi;J.;Hirano;T.;and Gyoba;J.
我们检查了与述情障碍相关的面部表情记忆处理功能障碍。根据多伦多述情障碍量表 (TAS-20) 测量，患有高述情障碍和低述情障碍的个体参加了视觉搜索任务（实验 1A）和变化检测任务（实验 1B 和 2），以评估其视觉短期记忆 (VSTM) 的差异。在视觉搜索任务中，参与者被要求判断搜索显示中的所有面部表情（愤怒和快乐的面孔）是否相同或不同。在变化检测任务中，他们必须确定连续两个显示器之间所有面部表情是否都发生了变化。我们仅在变化检测任务中发现个体差异。与愤怒的面孔相比，述情障碍高的个体对快乐面孔的敏感度较低，而述情障碍低的个体对两种面部表情都表现出足够的识别度。实验 2 使用单探针范例检查了 VSTM 过程的早期存储或后期检索阶段是否观察到个体差异。我们没有发现单探针的影响，表明在储存阶段存在个体差异。目前的结果提供了新的证据，表明患有高度述情障碍的个体在与快乐面孔相关但与愤怒面孔相关的 VSTM 过程（尤其是存储阶段）中表现出特定的损伤。
We examined dysfunctional memory processing of facial expressions in relation to alexithymia. Individuals with high and low alexithymia, as measured by the Toronto Alexithymia Scale (TAS-20), participated in a visual search task (Experiment 1A) and a change-detection task (Experiments 1B and 2), to assess differences in their visual short-term memory (VSTM). In the visual search task, the participants were asked to judge whether all facial expressions (angry and happy faces) in the search display were the same or different. In the change-detection task, they had to decide whether all facial expressions changed between successive two displays. We found individual differences only in the change-detection task. Individuals with high alexithymia showed lower sensitivity for the happy faces compared to the angry faces, while individuals with low alexithymia showed sufficient recognition for both facial expressions. Experiment 2 examined whether individual differences were observed during early storage or later retrieval stage of the VSTM process using a single-probe paradigm. We found no effect of single-probe, indicating that individual differences occurred at the storage stage. The present results provide new evidence that individuals with high alexithymia show specific impairment in VSTM processes (especially the storage stage) related to happy but not to angry faces.