Subjects: Psychology >> Physiological Psychology submitted time 2022-03-23
Abstract：
Stress includes two main stages: response and recovery. Stress recovery measurement mainly quantifies the recovery process through the area under the curve, curve fitting, average recovery rate, population pharmacokinetic model and other methods. Stress recovery is closely related to people's physical and mental health. Slow recovery will have an adverse impact on physical and mental health. Personality traits, environment, sleep, cognitive model and other factors will affect stress recovery. Future research can systematically investigate the impact of cognitive models on stress recovery, and pay attention to the physical and mental health of individuals with different recovery models.
Peer Review Status:
Awaiting Review
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
Subjects: Psychology >> Developmental Psychology submitted time 2021-01-11
Abstract： Childhood adversity can significantly increase the risk of depression, anxiety and other psychological disorders. An abnormal stress response is one of the important factors causing these psychological disorders.Childhood adversity may affect the activation of the HPA axis and enhance or decrease the sensitivity of stress response. Severe childhood adversity may increase the sensitivity of individual stress response, but mild and moderate childhood adversity may also produce protective "stress inoculation" effect.This paper expounds the influence mechanism of childhood adversity on stress response from three aspects: brain function, immune system and epigenetics.Future research should pay attention to controlling irrelevant variables and further explore the influence of different childhood adversities on stress response."
Peer Review Status:Awaiting Review
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