The influence of trait anxiety on autonomic response and cognitive performance during an anticipatory anxiety task

摘要

The interaction between emotion and cognition is thought to be intimately involved in the development and maintenance of anxiety disorders. In a set of studies, we investigated whether trait anxiety modulates cognitive performance and autonomic activity during an anticipatory anxiety task. Participants completed a letter-size decision-making task with two alternating 28-32 s background screen color-blocks. One of the colors was associated with the presentation of an aversive noise [unconditioned stimulus (UCS)]. Participants were aware of the background color that would (CTX+) and would not (CTX-) be paired with the UCS but did not know when or bow often the UCS would be presented. Two experiments were conducted. In Experiment 1, the UCS was presented during the decision-making task in the CTX+ color-blocks using a partial reinforcement schedule. Different noises were presented each time to increase unpredictability and prevent habituation. In Experiment 2, the UCS was never presented during the decision-making task. Results suggested that only the paradigm used in Experiment 1 was successful in eliciting anticipatory anxiety. In Experiment 1, continuously measured skin conductance response (SCR) data suggested that anxiety was significantly greater during CTX+ compared to CTX- trials; no SCR differences were found between high and low trait-anxious participants. Results further indicated that high trait-anxious participants responded significantly faster on the decision-making task during CTX+ compared to CTX- trials, whereas low trait-anxious participants displayed the opposite pattern. Our results reveal an interesting dissociation between the effects of individual differences in trait anxiety on autonomic activity and cognitive performance during an anticipatory anxiety task.