Ferrari Vera, Canturi Francesca, Codispoti Maurizio
Department of Medicine and Surgery, University of Parma, Italy.
Department of Medicine and Surgery, University of Parma, Italy.
Biol Psychol. 2022 Jan;167:108238. doi: 10.1016/j.biopsycho.2021.108238. Epub 2021 Dec 3.
Novel distractors are prioritized for attentional selection. When distractors also convey emotional content, they divert attention from the primary task more than neutral stimuli do. In the present study, while participants were engaged in a central task, we examined the impact of peripheral distractors that varied for emotional content and novelty. Results showed that emotional interference on reaction times completely habituated with repetition and promptly recovered with novelty. The enhanced LPP for emotional pictures was attenuated by repetitions and, interestingly, stimulus novelty only affected emotional, but not neutral distractors, in both the RTs and LPP. Alpha-ERD was similarly reduced for repeated emotional and neutral distractors. Altogether, these findings suggest that the impact of peripheral distractors can be attenuated through a non-strategic learning mechanism mediated by mere stimulus repetition, which is fine-tuned to detect changes in emotional distractors only, supporting the hypothesis that novelty and emotion share the same motivational circuits.
新型干扰物在注意力选择中具有优先性。当干扰物也传达情感内容时，它们比中性刺激更能分散对主要任务的注意力。在本研究中，当参与者进行一项中心任务时，我们考察了外周干扰物的影响，这些干扰物在情感内容和新颖性方面存在差异。结果表明，对反应时间的情感干扰会随着重复而完全习惯化，并随着新颖性而迅速恢复。情感图片增强的晚期正电位（LPP）会因重复而减弱，有趣的是，刺激新颖性仅在反应时间和LPP方面影响情感干扰物，而不影响中性干扰物。对于重复的情感和中性干扰物，α事件相关去同步化（Alpha-ERD）同样降低。总之，这些发现表明，外周干扰物的影响可以通过一种由单纯刺激重复介导的非策略性学习机制来减弱，这种机制仅针对检测情感干扰物的变化进行微调，支持了新颖性和情感共享相同动机回路的假设。
