ONTOGENY OF 2-POINT DISCRIMINATION FOR FINGERS AND TOES IN CHILDREN (AGES 7 THROUGH 15 YEARS)

Accuracies of two-point discriminations (successive 2-mm increments be tween 0 and 10 mm) for the middle fingers and the middle toes for 87 c hildren from ages 7 through 15 years were measured to obtain normative data. The finer discriminative capacity for the fingers rather than t he toes was evident. Whereas discriminative accuracy approached the as ymptote with distances equal to or greater than 4 mm for the fingers, distances equal to or greater than 8 mm were required for the toes. Fo r this ontogenetic range, the effects for toes vs fingers was much gre ater than the effect size far age.