Examined longitudinally changes in inhibition from toddler age to age 4 and age 7 years. Found that temperament change in children who tested as inhibited or uninhibited as toddlers was more common than remaining extremely inhibited or uninhibited, but that change was largely limited to intermediate groups. Subgroups distinguished by responses on measures of shyness, inhibitory control, impulsivity, behavioral inhibition, and exuberance showed stable outcomes. (JPB)