| The decision-making occurs around daily life, not even in choose what to eat for breakfast,but also in choose when to rest in the evening. Decision-making is facing the problem and aims.analyzing problems, and solving the problems. Individual in the principles of decision-making is their own choice can make themselves meaningful or helpful. Individuals to make decisions in two scenarios:situations of certainty and situations of uncertainty. Deterministic context choice is determined by the individual to make decisions only from individual to determine to choice the optimal selection based on the principle of self. Uncertain situation contain ambiguous choice or selection of risk choice in this context is unclear, to obtain the probability is not clear, it means the benefits and risks coexist. Most of the decision-making in daily life belong to the uncertain situation of risk decision-making. How decision makers perceive and treatment of risk preferences (Risk appetite) has also become important areas of decision-making research. There are many factors that affect risk decision-making, including whether an individual is rational, the account of priori probability, the individual’s state is good or not, gain/loss matrix, and expectations. Neuroscience study found that the neural regions of interest related to income, mainly in the ventral striatum, anterior cingulate cortex (ACC), dorsal striatum, the ventromedial prefrontal cortex (VMPFC) and the nucleus accumbens and other brain regions; regions of the loss associated with anterior cingulate cortex (ACC), amygdala, insular and dorsal striatum.Individual state for the impact of risk decision-making includes the individual’s emotional state on decision-making, and emotional risk decision-making in many studies have been confirmed, anger and happyemotions enable individuals to make decision-making with greater risk, namely risk-seeking preferences,and fears allows individuals to select a less risky option.namely the risk aversion preferences. The neural mechanisms of the fears and amygdala linked to its activation play a key role to judge the fear signal. Fear will lead to overestimate the level of risk appears in the experiment, to avoid greater risk selection decisions named loss aversion. The findings of the amygdala and the loss of evading a direct link only on from the amygdala damage patients,but not been found in the study of normal subjects.In this study, in order to further study the role of the amygdala in risk aversion, the emotional expression of images and emotions masked eyewhites pictures as experimental materials to study early showing fear influence on the subsequent risk decision-making tasks. Study I use the emotions of fear expression pictures and neutral expression picture for investigated whether there is a mood priming effect and its impact on the risk decision-making tasks. The results showed that the fear of emotional information can speed up the trial decision-making choice response, but the final decision-making results have no significant changes. The experiment II use marked eyewhites to stimulate the threshold presentation for investigated the amygdala to be activated separately for risk decision-making tasks. The results showed that subliminal presented the masked fear eyewhites can also speed up the decision selected by the test reaction, and the final performance under the framework of loss the correct rejection rate also increased, indicating activation of the amygdala are indeed able to increase subjects losses disgust. |
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