Adolescent Mood Dynamic Characteristics And Adjust Strategies In Their Mood Changes

This thesis proposes a dynamic equilibrium model of the mood on the basis of the existing research papers. This model emphasize that the individual mood is relatively stable, but departure from their equilibrium state because of the influence of endogenous elements and exogenous elements, and the individual mood will return to its stable state , even establish a new equilibrium state because of the influence of the body's regulative and adaptive mechanism and its relatively stable personality traits. The amplitude, velocity and frequency of the individual mood departure from equilibrium varies because of individual differences in stable personality traits and physiological parameters.Under the guidance of the dynamic equilibrium model, we studied the main tone of the mood (including both positive mood and negative mood) of the juveniles mainly in junior schools, high schools and colleges, and development characteristics of mood-related affect intensity, metal resilience, the usage in cognitive reappraisal and expression suppression regulation strategy. With the understanding of the main tone in mood of the juveniles, we tracked them for 28 consecutive days. Using the method of spectral analysis in dynamic system theory, we studied the characteristics of the amplitude, frequency and the period of the fluctuation of their mood. We also studied the fluctuating rules and development characteristics of their mood in a day, a week or a month. On the basis, we also studied the relation among the personality traits, the main tone of mood and the characteristics of the fluctuation of their mood. In order to learn the influence of regulating strategies on the fluctuation of their mood of the juveniles, we employed both subjective reports and physiological records, we simulated genuine situation with emotion induced software made by ourselves in the lab, studied the influence of cognitive reappraisal and strategy of expression suppression on mood of the juveniles, while studying the regulating influence of parasympathetic, the equilibrium of sympathetic and parasympathetic with the index of RSA or HF, LF/HF.As a result, we found that the main tone in mood of the juveniles tends to be more positive, while their affect intensity and metal resilience descends. In regard with the dynamic characteristic of the fluctuation of their mood, junior school students fluctuate more than graduates, while girls fluctuate more than boys. The study also reveals that the fluctuation cycle periods are 7days or 28days. During a day, positive mood intensity reaches the peak at some time at noon, and then it descends gradually, while negative mood intensity ascends during a day. From Monday to Friday, the fluctuation of their mood appears to be like the sine wave. The junior school students evidently have the 'blue Monday' effect, while the graduates show no sign of such phenomenon.As to the influence of strategy of emotion regulation on the mood, cognitive reappraisal notably decreases the experience of negative mood, and the HF value is relatively high; although strategy of expression suppression does not decreases the experience of negative mood, the HF value is relatively low. As to the values of LF/HF expression suppression is notably lower than the non-regulation. The strategies of both and expression suppression and cogitation reappraisal have different effects on both experience and on physiology. As to the usage of the strategy of emotion regulation, junior school students and high school students cannot fully understand the strategy, and regulate themselves badly.This study also finds that personality traits has relation with the mood experience, affect intensity, metal resilience, the frequency of fluctuation of mood and the regulation strategy usage.