Centre for the Advancement of Learning and Teaching, University of Tasmania, Private Bag 133, Hobart, Tasmania, 7001, Australia.
Int J Psychophysiol. 2009 Dec;74(3):266-73. doi: 10.1016/j.ijpsycho.2009.09.011. Epub 2009 Oct 4.
The interactive effects of emotion and attention on attentional startle modulation were investigated in two experiments. Participants performed a discrimination and counting task with two visual stimuli during which acoustic eyeblink startle-eliciting probes were presented at long lead intervals. In Experiment 1, this task was combined with aversive Pavlovian conditioning. In Group Attend CS+, the attended stimulus was followed by an aversive unconditional stimulus (US) and the ignored stimulus was presented alone whereas the ignored stimulus was paired with the US in Group Attend CS-. In Experiment 2, a non-aversive reaction time task US replaced the aversive US. Regardless of the conditioning manipulation and consistent with a modality non-specific account of attentional startle modulation, startle magnitude was larger during attended than ignored stimuli in both experiments. Blink latency shortening was differentially affected by the conditioning manipulations suggesting additive effects of conditioning and discrimination and counting task on blink startle.
在两项实验中研究了情绪和注意力对注意性惊跳调制的交互影响。参与者在执行具有两个视觉刺激的辨别和计数任务期间，在长的先导间隔期间呈现听觉眨眼惊跳诱发探针。在实验 1 中，该任务与厌恶条件反射相结合。在注意 CS+ 组中，注意刺激后跟随厌恶无条件刺激（US），而忽略刺激单独呈现，而在注意 CS- 组中，忽略刺激与 US 配对。在实验 2 中，非厌恶反应时任务 US 取代了厌恶 US。无论条件反射操作如何，并且与注意性惊跳调制的非特定于模态的解释一致，在两个实验中，惊跳幅度在注意刺激时大于忽略刺激时。眨眼潜伏期缩短受到条件反射操作的不同影响，表明条件反射和辨别与计数任务对眨眼惊跳的附加影响。
