Beginnings of self-control
1. Emerges in infancy and gradually improves during the preschool years
2. At about their first birthday, infants become aware that people impose demands on them and they must react accordingly
3. At about 2 years of age, toddlers have internalized some of the controls imposed by others and are capable of some self-control in their parents' absence
4. At about 3 years of age, children become capable of self-regulation; they can devise ways to control their own behavior
5. Although preschoolers are able to regulate impulsive behavior somewhat, they still have much to learn, and control is achieved only gradually throughout the elementary-school years