This thesis estimates the rate between real acrophobic stress level and acrophobic stress level with immersive virtual system based on electro-dermal activity. One result is that the stress under the VR system is larger than the real stress. The other result comes from gender difference under the VR circumstance. The stresses of female participants are larger than that of male examinees. The reasons of these results can be due to the system. According to the questionnaires, participants embrace more sense of altitude and dread of height and lose sense of postural stability under VR condition, which can engender additional stress.
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