The development of strategies that support autonomous self-regulation of emotion is key for early childhood emotion regulation. Children are thought to transition from predominant reliance on more automatic or interpersonal strategies to reliance on more effortful, autonomous strategies as they develop cognitive skills that can be recruited for self-regulation. However, there are few longitudinal studies documenting age-related changes in different forms and dimensions of strategies. The current study tested predicted agerelated changes in strategy use in a task requiring children to wait for something they want. Specifically, we examined the longitudinal trajectories of 3 strategies commonly observed in delayed reward tasks: selfsoothing, seeking attention about the demands of waiting (bids), and distracting oneself. We followed a sample of 120 children (54% male, 93.3% white, from semirural and rural economically strained households) from ages 24 months to 5 years who participated in a waiting task each year. Using growth curve modeling, we found declines in self-soothing, rises and then declines in bidding, and increases in distraction from 24 months to 5 years. Next, we investigated whether strategy use trajectories predicted adult ratings of children's emotion regulation during the task, that is, whether children appeared calm and acted appropriately while waiting. Growth in duration and dominance of distraction use predicted judgments that children were well-regulated by age 5 years, whereas growth in dominance of bidding use negatively predicted being rated as well-regulated. We discuss implications for the understanding of strategy development and future directions, including understanding strategy effectiveness.

Self-regulation often refers to the executive influence of cognitive resources to alter prepotent responses. The ability to engage cognitive resources as a form of executive process emerges and improves in the preschool-age years while the dominance of prepotent responses, such as emotional reactions, begins to decline from toddlerhood onward. However, little direct empirical evidence addresses the timing of an age-related increase in executive processes and a decrease in age-related prepotent responses over the course of early childhood. To address this gap, we examined children’s individual trajectories of change in prepotent responses and executive processes over time. At four age points (24 months, 36 months, 48 months, and 5 years), we observed children (46% female) during a procedure in which mothers were busy with work and told their children they had to wait to open a gift. Prepotent responses included children’s interest in and desire for the gift and their anger about the wait. Executive processes included children’s use of focused distraction, which is the strategy considered optimal for self-regulation in a waiting task. We examined individual differences in the timing of age-related changes in the proportion of time spent expressing a prepotent response and engaging executive processes using a series of nonlinear (generalized logistic) growth models. As hypothesized, the average proportion of time children expressed prepotent responses decreased with age, and the average proportion of time engaged in executive processes increased with age. Individual differences in the developmental timing of changes in prepotent responses and executive process were correlated r = .35 such that the timing of decrease in proportion of time expressing prepotent responses was coupled with the timing of increase in proportion of time engaging executive processes.