Better not to deal with two tasks at the same time when stressed? Acute psychosocial stress reduces task shielding in dual-task performance
Better not to deal with two tasks at the same time when stressed? Acute psychosocial stress reduces task shielding in dual-task performance
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DOI：
10.3758/s13415-012-0098-6
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发表时间：
2012-09-01
影响因子：
2.9
通讯作者：
Fischer, Rico
中科院分区：
文献类型：
--
作者：
Plessow, Franziska;Schade, Susann;Fischer, Rico
成功的双任务表现的一个主要控制需求是任务-目标表征和相关刺激-反应翻译过程的任务特异性分离。在本研究中，我们调查了这些认知控制过程的任务屏蔽是如何影响急性心理社会应激。五十六健康的参与者暴露于急性心理社会应激源（特里尔社会压力测试）或标准化控制的情况下之前的双重任务。通过分析任务2处理对优先任务1性能的干扰来评估任务屏蔽。成功的应激诱导后，如唾液α-淀粉酶（sAA）和皮质醇的增加，反映交感神经系统和下丘脑-垂体-肾上腺（HPA）轴活动的增加，分别表示，强调个人显示减少任务屏蔽相对于控制。这一结果进一步证实了治疗相关的皮质醇增加，但不是sAA，和任务间干扰之间的相关性，这表明HPA应激反应的潜在作用的发展所观察到的效果。作为一个额外的发现，当志愿者被归类为他们的行动-状态取向，他们的方向并没有与压力，但没有显示普遍增加任务间的干扰，从而低劣的任务屏蔽，状态导向相比，行动导向的个人。
A major control demand in successful dual-task performance is the task-specific separation of task-goal representations and of the related stimulus-response translation processes. In the present study, we investigated how these cognitive control processes of task shielding are affected by acute psychosocial stress. Fifty-six healthy participants were exposed to either an acute psychosocial stressor (the Trier Social Stress Test) or a standardized control situation prior to a dual task. Task shielding was assessed by analyzing the interference of Task 2 processing on prioritized Task 1 performance. Following successful stress induction, as indicated by increases in salivary alpha-amylase (sAA) and cortisol that reflect increases in sympathetic nervous system and hypothalamus-pituitary-adrenal (HPA) axis activity, respectively, stressed individuals displayed reduced task shielding relative to controls. This result was further substantiated by a correlation between treatment-related increase in cortisol, but not sAA, and between-task interference, suggesting a potential role of the HPA stress response for the development of the observed effects. As an additional finding, when the volunteers were categorized with regard to their action-state orientation, their orientation did not interact with stress but did reveal generally increased between-task interference, and thus inferior task shielding, for state-oriented as compared to action-oriented individuals.