Body-scaled transitions in human grip configurations

This article reports two experiments that were set up to examine the prefer red human grip configuration used to displace cubes that varied in length ( L-c) mass (M-c), and density (ML3). In particular, the authors sought to pr ovide a mole precise test of a dimensional relation between the object and the hand that had previously been shown to predict the grip configuration u sed to transport an object from one location to another. The experiments ex amined 2 grip transitions (from 3 digits to 4 digits and from 1 hand to 2 h ands) within 2 sets of object conditions. In Experiment 1, cubes with a low density and a small increment in size (1 mm) were used, whereas in Experim ent 2, cubes with 2 fixed sizes and small increments in mass were used. The results showed that the body-scaled equation K = logL(c) + (logM(c)/a + bM (h) + cL(h)), where M-h and L-h are the anthropometric measures of the hand mass and length and a, b, and c are empirical constants, is the body-scale d information that predicts the grip configurations used to displace object s.