Do we perceive correctly whether a 2-D object is balanced or unbalanced? What would be the cause of biased equilibrium judgments? In two psychometric studies, we varied independently the characteristics of the objects and the equilibrium states. First, we observed that observers were excessively sensitive to the eccentricity of the object top.…

Examined the ability of children from 6 to 12 years of age to draw human figures and to reconstruct the drawing abilities they possessed at earlier ages. Found that diachronic thinking, or the ability to understand a present situation as a stage in an evolving process, developed with age. (MDM)