Streetscape evaluation sometimes varies from person to person. The authors have attempted to identify the aspects of the evaluation structure from which this individual variation in evaluation arise, and to ascertain what kind of conditions must be satisfied in order to express the structure of streetscape evaluation in a way that accounts for individual variation. Based on the data assessed by the leslees, the authors determined the primary cause of individual difference in streetscape evaluation to be not differences the conventional "attributes of people" or "weighting of assessment parameters", but rather differences in the elements perceived in streetscape, that is, differences in assessment parameters. This fact has lead the authors to conclude that while it is necessary to incorporate individual variation into the relationship between streetscape characteristics and assessment parameters, it is sufficient to incorporate the relationship between assessment parameters and streetscape assessment using elements that are universal to a certain extent.
