Depressed Individual Voice To The Mood Of Response Bias

With the development of the society, people face more and more stress from all sides of life, nervous rhythm of life and too much social competition makes people’s psychological health become fragile. People begin to suffer from all kinds of psychological problems and mental diseases.In these psychological problems and mental diseases, depression becomes the biggest killer, including temporary depressive state、dysphonic and depression. The subjects of this research are d individuals subclinical depression, and do not include any mental depression. The subjects are the students from Southwest University, university students are faced with the new environment, pressure of study, interpersonal tension and employment pressure, and as a result of their own personality and the way to deal with problems, some students will suffer from depression, depression can affect their study, the life and health. This study aimed in investigate the rate of depressive students and their special way of processing affected information.Beck depression inventory [1] is the most commonly used depression self-rating scale, was introduced and revised in China [2], In total 21 scale projects, every project has four options of different degree, and in order to avoid the habit effect, the scale have positive selection 10,and 11 adverse selection. The scale uses 0-3 points scoring system, and subjects of scores in 10-15 are divided into probable state of depression, and 15 to 25 moderate depression, more than 25 points severe depression [3].900 students fill in questionnaires, effective questionnaire for 850 copies. Through the statistics, the rate in 10～15 scores was 11.42%, between 15 and 25 is 8.82%, and above 25 points was 1.53%. The choosed subjects of depression group were scoring above in 15 points, and normal group was scoring below five points i.60 voices were selected from the Native Affective Sound Systems[3].20 in them were negative and 20 neutral voices and 20 positive voices.60 students were recruited and paid for rating the valence, arousal of these 20 sounds.The result of rating showed that gender differences exist in the emotional feeling to negative sound. Female feelings to negative sounds were stronger than male. Gender differences, in neutral sounds and positive sounds. Through the rating results from 60 affected sounds,18 affected sounds were selected,6 neutral sounds,6 negative sounds and 6 positive sounds. Gender differences didn’t exist in the arousal of 18 sounds. The Physiological Responses to 18sounds of two group subjects were recorded.In the memory test, stimulus materials were the 18 rated sounds..First each sound was listened once, and then memory test was conducted. The subjects were instructed recognize the181istened sounds. Besides, at the same time,18 no-listened were presented, that concluded 6 positive、6 negative and 6 neutral sounds.26 depressive persons participated in the memory test, among them; the girl is 17, the boy 9. The control group had 28 persons, the girl 16, and the boy 13. Error rate of three valences was satiated within subjects and between subjects. There main effect exists in valence, and the error rate of positive and negative stimulus is lower than the neutral stimulus. The error rate of depression group to emotional stimulus was lower than the control group. In addition, the error rate of depression group in negative sound was lower than emotional sounds, but the memory error rate of the control group in negative sound was higher than emotional sound. So the mood could be beneficial for memory, and depression group were more susceptible to emotional interference. But interference effect wasn’t not in the neutral stimulus. And relative to positive stimulus depression group were easier to remember negative stimulus, while control group were easier to remember positive stimulus. And then through statistical analysis of two kinds of the errors (wrong rejects, misidentification) in the two groups, the wrong reject rate of negative sounds of depression group were found lower than positive stimulus, and the misidentification rate of negative stimulus of depression group was higher than positive stimulus. That explained that depression group were better at memorizing negative sound than affected sounds. In summary, the memory of the depression group is more vulnerable to the interference of emotional stimulus, and the negative stimulus memory is stronger than positive stimulus..Through biofeedback instrument two groups had the autonomic nervous reaction record of three valences of sound.Emotional stimulus can cause people emotional responses, and emotional responses have three aspects:the external emotional expression, physiological response and psychological experience, so emotion will cause the autonomic nervous changes. The autonomic nervous include sympathetic and parasympathetic nerve. The autonomic nervous change [5], namely the emotional response can cause the heart rate, blood pressure, skin electricity and muscle electricity to change. For both groups, the autonomic nervous reaction recorded basically has the corrugator supercilii muscle and zygomaticus major muscle electricity, the heart rate, skin electricity. The activation of the corrugator supercilii muscle existed the valence main effect, and there was more corrugator EMG activity when listening unpleasant, compared to pleasant sounds. Compared to the control group, but this difference was larger for the depressive group. In addition, corrugator activity was decreased when listening pleasant, compared to neutral, sounds. The normal group did not show this effect. Pleasant sounds caused more zygomaticus muscle activation than negative sounds. Compared to the normal group, but this difference was smaller for the depressive group. Across all sounds, the depressive group showed larger changes in skin conductance levels, compared to the normal group. Greater reactivity when hearing unpleasant sounds for the depressive group was supported by a difference in skin conductance magnitude when hearing unpleasant sounds, but not when hearing pleasant sounds. Greater heart rate deceleration occurred when hearing unpleasant, relative to pleasant sounds, Compared to the normal group, but this difference was larger for the depressive group.After physical experiment, the two group were asked to rate the valence, arousal of these 18 sounds. The relationship between individual’s ratings of pleasure and arousal and their physiological responses, were assessed. Corrugator EMG activity was inversely related to judgments of pleasure. Zygomatic EMG activity and ratings of pleasure showed a modest and significant linear dimensional correlation. Skin conductance responses increased with increases in rated arousal, resulting in a small, but significant dimensional correlation. Heart rate change did not consistently co-vary with either ratings of pleasure or arousal in this study.