Abstract
Impressions regarding risks related to traffic scenes were investigated. Adult participants（N=97）were shown five pictures consisting of traffic scenes drawn from the driver’s perspective. Using the hypothetical situation method, participants were requested to point to parts of the drawings that gave an impression of a risk. They identified 54 such parts. These parts, with the exception those identified by only a few participants were categorized as feeling risky or not risky. Then they were analyzed using Hayashi's quantification theory （III） and hierarchical cluster analysis. Results indicated five clusters: （1） Feeling of risk evoked by stimulus features, （2） Feeling of risk caused by distance from others, （3） Judgments on riskiness of a situation, （4） Expectations of risks caused by own behavior, and （5） Expectation that something will collides with own vehicle. These results suggest that both intuitive and analytic processing underlie the risk perception.
