The formal operations skills and problem solving performance of 60 gifted girls (grades 4 through 6) were investigated. Ss were given Piagetian tasks which involved conservation of mass and weight, use of proportion, oscillation of the pendulum, and projection of shadows. Among findings were the following: (1) no relationship between IQ and either concrete operations (CO) or formal operations (FO) total scores; (2) positive association between age and total FO scores; (3) inverse correlation between time and IQ, CO, FO, and total Piagetian test score; and (4) precocity in 9 to 10 year old gifted girls on standardized intelligence scales and ability to solve Piagetian tasks quickly and correctly. Tables with statistical data are provided and descriptions of Piagetian tasks are appended. (SB)