Subjects: Psychology >> Physiological Psychology Subjects: Psychology >> Medical Psychology submitted time 2023-12-24
Abstract： Objective: Identify the acute stress response patterns, and explore the difference of state anxiety and positive and negative emotion scores of different acute stress response models at different time points. Methods: The acute stress response of 226 healthy adults was induced by the stress inducing task. Salivary cortisol was collected and the trait anxiety scale, state anxiety scale, and positive and negative emotion scale were filled out at different time points. The latent class growth analysis of salivary cortisol was used for heterogeneity testing. Results: The results showed that the acute stress response pattern can be divided into three latent class: low stress response, medium stress response and high stress response. The state anxiety scores and negative emotion scores of individuals with low acute stress response after the end of stress task were significantly lower than those at the end of stress task. Conclusion: The acute stress response pattern has obvious classification characteristics, including low stress response, medium stress response and high acute stress response. Low stress response individuals will experience negative emotional experience for a short time after stress.
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Subjects: Psychology >> Cognitive Psychology Subjects: Psychology >> Experimental Psychology submitted time 2021-06-02
Abstract： Acute stress is a nonspecific response where an environmental demand exceeds the natural regulatory capacity of an organism, in particular situations that include unpredictability and uncontrollability. The acute stress can affect individuals' attentional bias to emotional stimuli. Previous researches mainly focus on the effect of acute stress on the attentional bias of negative stimuli (e.g. threat), but less is known about the effect of acute stress on positive emotional stimuli (e.g. pleasure,). At the same time, previous researches focused more on the covert attention, compared to the overt attention. It is known that acute stress affects individuals' covert attention bias to emotional stimuli, but the mechanism of how it affects overt attentionl bias is still unclear. To this end, the current study was aimed to investigate the cognitive mechanism of the effect of acute stress on the overt attentional bias of positive and negative emotional stimuli by using an eye tracking techniques. In this study, forty-six healthy male adults were randomly assigned to a stress group (n = 24) and a control group (n = 22). The stress group induced the stress state of individuals by the MAST acute stress task, while the control group remained under the control condition, and then completed the attentional engagement-disengagement task. The results were as follows :(1) The MAST acute stress task successfully induced the stress state of the subjects, and the cortisol concentration, state anxiety scores and negative emotion scores in the stress group were significantly higher than those in the control group, while the positive emotion scores were significantly lower than those in the control group. (2) As for the results of behavioral responses, The response time to attentional engagement of positive emotional faces in the stress group was significantly longer than that in the control group; There was no significant difference between the stress group and the control group in the attentional engagement response time of negative emotional faces. The response time of stress group to attention disengagement of positive and negative emotional faces was significantly longer than that of control group. (3) Eye movement results showed that there were no significant differences between the stress group and the control group in the direction of initial gaze, first fixation latency and first fixation duration on positive and negative emotional faces. The total fixation time of stress group was significantly longer than that of control group on negative emotional faces, but there was no significant difference between stress group and control group on positive emotional faces. These results suggest that in overt attentional bias, acute stress disrupts attention disengagement to emotional faces, rather than attentional engagement. We found that acute stress can stably affect the attention disengagement of general negative emotional faces, rather than the specific damage of threat stimulation alone, and this effect occurs in the late stage of attention processing. This may be due to the damage of attention function related to frontal - parietal network by acute stress. However, the effect of acute stress on the attentional bias of positive emotional faces and the related cognitive mechanism need further research.
Peer Review Status:Awaiting Review
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