This is the second of two measures designed for this study to test the child's vigor. The measure consists of instructing the child to turn a large wooden crank, mounted on a stand, as fast as he can until the E says to stop. Two trials of 15 second each, preceded by a practice trial, were presented. The score was the number of turns completed in each 15-second trial. The test had low correlations with other test scores in both year. The Vigor 2 score appeared to be determined by more than immediate energy level, but the nature of these other components is presently unclear. The data indicated that cognitive and motivational variables were associated with the score. Sex and age differences suggest that sex-typed behaviors and physical coordination are also being tapped. The extent to which Vigor 2 also taps vigor, persistence and/or willingness to please the examiner is unknown. (For related documents, see TM 003 174-197.) (KM)