ECKERT, HELEN M., and EICHORN, DOROTHY H. Construct Standards in Skilled Action. CHILD DEVELOPMENT, 1974, 45, 439-445. Factorial analyses of various eye-hand coordination tasks were computed by age and sex for longitudinal data from ages 41 through 8i. The results indicated a reduction from 3 to 2 factors between 41 and 51 years for females and between 51 and 61 for males. These factors were tentatively identified as patterning and speed. Increases in performance means and decreases in standard deviations occurred with increasing age for both sexes. Generally, sex differences were nonsignificant. Theoretical models of skilled action development are discussed, with the results tending to support a construct standards model.