FIRST-ORDER AND SECOND-ORDER PATTERN PSYCHOPHYSICS
Pattern psychophysics involves intrinsically difficult problems. It is not easy to determine a relevant physical parameter for shapes and forms to be judged. Moreover, stimulus patterns always produce various psychological responses such as regularity, complexity, goodness, beauty, or preference. Therefore, in this study, we tentatively propose two kinds of pattern psychophysics. In first-order pattern psychophysics, functional relationships between variables that describe physical features of patterns and intermediate perceptual or affective dimensions such as regularity or softness are derived by multidimensional analyses. In second-order psychophysics, correspondences between the obtained intermediate dimensions and higher-order perceptual or affective properties such as goodness, beauty, or attractiveness are further examined by appropriate multivariate data analyses. Typical studies in first-order and second-order pattern psychophysics are introduced and their versatile utilities are discussed.