| Emotional stability is basic psychological character which is essential for such professional activities as aviation and space, etc. which are high dangerous and high cognitive workload. Meanwhile it is precondition that the high tech tasks are accomplished under the special condition and circumstances as well. The flying achievements and the ability to deal with flying emergency are close related to the pilot's emotional stability. Therefore, studies on effective prediction of emotional stability and the relationship between the flying cadets' emotional stability and the influencing personality traits are very important.There were 353 flying cadets of civil aviation as subjects in this research. Firstly, through the literature search and analyse on the research's purpose, determined the operating definition of emotional stability. Secondly, through the interviews with 63 pilots and job analyse of flight, the evaluating system of criteria on flying cadets' emotional stability has been founded, integrating the operating definition. Thirdly, some dimension and some questions concerned were selected from MMPI, EPQ and ANSLE. And on the basis of former study, questionnaires on situational cognition were worked out. And UK test was chosen as a judgment test of temperament.The subjects' scores of psychological admission test for flying cadets and the achievements of academic study, and of the selected flying test and of the first-single flying test were available as working performance. The subjects'flying operation in cabin were evaluated by their flying coaches as well. Fourthly, the subjects' personality traits, the traits of the situational cognition and the working performance were evaluated with the battery mentioned above. Lastly, the effective predicated indexes were selected with statistical method.The main results:1. Found the evaluating system of criteria on flying cadets' emotional stability and the measure of personality traits influencing emotional stability.2. Found the significantly relationship between the emotional stability and the flying performance in cabin.3. EPQ-N was found to be significantly correlated to MMPI-MAS, MMPI-A, attitude towards test, attitude towards flight and self-cognition.4. Among the indexes of personality, the significantly correlationship between MMPI-MAS, EPQ-N and 2 factors of criterion, 'the general emotional stability' and 'flying tension' were found.5. Among the situational cognitions, 'self-cognition' was found to be significantly correlated to 'the general emotional stability' and 'emotional expression in flight'.6. In UK test, the significantly correlation was found among 'excitability', 'disorder' and all the 3 factors of criterion.7. The significantly correlation among flying operation, scores of psychological admission test for flying cadets and all the 3 factors of criterion were found.8. A comprehensive evaluation with the indexes above got a satisfied predicted conclusion on another samples, 18 flying cadets.9. Among all of the indexes, working performance under stress condition was the most effective.Theory proved:1. Emotional stability consists of two kinds, one is under high stress and another is in general condition. Only viewing from personality, emotional stability in general condition can be evaluated with EPQ-N, MMPI-MAS and 'excitability' and 'disorder' of UK test. As for the emotional stability in general condition, the effective evaluating indexes include working performance under high stress, self-cognition, 'excitability' and 'disorder' of UK test. Therefore when the emotional stability is evaluated, the integrated methods must be used.52. The excitability of UK can reflect the subjects' temperamental reaction, and the degree of reaction is related to their emotional stability and working performance under high stress.3. build up a basic model for psychological stability.Conclusion: Emotional stability is a vital psychological character for flying cade...
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