Abstract
In this research, we investigated to clarify the layered structure of based on what physical characteristic people are discriminating the difference in a forest scene. First, the physical characteristic item and the subdivision item were extracted from a subjects words, and importance between items was examined. Then, it investigated about the relation of experience and knowledge of an evaluator, and the characteristic that each item has. Consequently, the items used as an index were extracted, and it turns out that “the form of a tree crown” is the most important factor on the occasion of discernment, and there is a possibility that the importance between items changes with experience etc.
