Rudolf Arnheim, former Harvard Professor of the Psychology of Art, developed a theory that the perception of the structure of things in the world is based on simultaneous use of two primary systems: (1) the cosmic system of concentricity and (2) the parochial system of the Cartesian grid. The Cartesin grid imposes order, while the concentric…

Factor analysis of correlations among the measures of recall clustering, free sorting, and recognition errors revealed significant convergent validity for consistent use of a semantic perceptual organization strategy in the three tasks. Ten-year-old, adult, and elderly adult subjects relied on a semantic strategy; four- and six-year-olds encoded…