An experiment to determine whether color or form "plays a major part in the total apprehension of an object by individuals of a given age and whether this relative potency tends to change with age." The method consisted in matching a series of geometrical solids and surfaces of different colors, so arranged that either form or color might be matched but never both simultaneously. 474 S's from two years to adulthood were used. Below three years form predominates, then color up to age six. From six years to adulthood form gains steadily. At 4 1/2 years 75% of the choices were based on color; in adults 90% of choices were based on form. (PsycINFO Database Record (c) 2006 APA, all rights reserved)