| Military psychological operations (PSYOPS) was defined as the means in which some effective information stimulus could pass to enemy personnel by some specifically information medium to cause their decaying will, confused thinking, unadvisable decision-making and degressive battle effectives. Information was thought as the most important tool of psychological operations. Implicit psychological stimulus could act on human subconsciousness by some hidden manner and cause anticipant mental responses. In psychological operations, those obvious elements were understandable, but enemy could see them though easily. Those implicit elements were inexplicable, but enemy could be decoyed and accept some idea or standpoint.The elements of the information used in psychological operations contained carrier element, code element, rule element and meaning element. Colour could fuse into and give expression to every element meanwhile it could transmit some information as a carrier or a code. Colour also had some societal meaning because it could have different characteristics in different country or nation. Colour could have double features of psychology and physiology, so it could impact psychological and physiological functions through ocular and nocular passage. Because colour could transmit implicit stimulus effectively, the study on the impact of implicit stimulus transmitted by colour on human sentimen, cognition, manner and behavior should be very important.Knowledge is updating just as colour is fluid, so the psychological meaning of colour is changing and growing year by year. But the researchers follow foreign theory and results of some old empirical researches in most domestic studies. On the other hand, there were some problems of sociality and ergonomics in military operation. It has been a considerable question for study or discussion to elevate performance achievement and mental shelter in war. Information stimulus could activate some dormant cognition which rooted in societal experience. It should become an important topic if some implicit stimulus transmitted by colour could do so in psychological operations.Aims:1. To establish a library of psychological meaning of Chinese military personnel by analyzing their culture of colour meaning for selecting colour used in psychological operations.2. To investigate the impact of some implicit stimulus transmitted by colour on the testee's subjective evaluation on their emotion.3. To investigate if the colored light can influence the degree of vigilance and analyze its axiom. To provide some evidences in abstract for using color or colored light as weapons in psychological operations.Methods:1. The investigation on colour's meaning for Chinese military personnel. Some special questionnaires were used to exam subjects for evaluating color's meaning and quantizating colour information.2. Subjects'emotional responses were evaluated by quantizating the information of emotional response. Then their emotional responses to some pictures in different colored background were evaluated by Osgood's methods, meanwhile some capital physiological index and eyes's motion of Subjects were monitored and recorded by polyphysiograph and Eyelinkâ…¡respectively.3. Subjective evaluation on the relationship between color and the degree of vigilance was tested. The conditions of visual consciousness in 3 different neutral colour and 7 colour backgrounds were compared. Furthermore, the impact of different color backgrounds on the cognitive performance was evaluated. Physiological index in different backgrounds were recorded and analyzed to evaluate the different influence of various color backgrounds on subject's physiological functions.Results:1.The architecture of color meaning was reconstituted preliminarily by localization classify, which contained synestheea, concrete thought association, figure delineation, things delineation, emotion, symbol and so on. Color meaning was zoomed and enriched, so a library of psychological meaning of Chinese military personnel was provided.2. Color as a kind of implicit information, could impact on subjective emotional responses to the pictures with different emotional characteristics effectively. Therefore, the results of this study suggested that color background could be very helpful to enhance the effectiveness of pictorial main body, which provided a theoretical evidence for using special color background in psychological operations.3. The results of this study suggested that different color backgrounds could influence subject's ability of cognitive performance powerful and the influence could be different based on different degree of difficulty of performance. One the other hand, the change of subject's physiological index could be different exposed in different color backgrounds or exposed for different duration.Conclusion:1. The color psychological meaning of Chinese military personnel has stability and particularity.2. Color as a kind of implicit information, could impact on subjective emotional.3. People have favorable physiological status and well operate ability when they work in short wave light.
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