Development of quantitative evaluation method of view effects as a window performance of buildings (part 1) 1 2 3 4 Takuya MURACHI, Shigeki MATSUNAGA, Yoshiro HORI and Nozomu YOSHIZAWA The final purpose of this study is to position the psychological "view effects" as one of the quantitative evaluation items of windows. In this paper, firstly, users' own criteria for evaluation on views from windows were collected by interviews based on the evaluation grid method, and then subjective experiments in the actual commercial buildings were conducted and the relationship between psychological value judgement of views and the environmental conditions was examined through covariance structure analysis. As a result, "good view" is determined by three factors: "clarity", "wide view", "landscape evaluation", and "clarity" has the strongest influence on "good views".