Toddlers' Helping Behavior Is Affected by the Effortful Costs Associated With Helping Others.

Although the presence of early helping behavior has been firmly established, it is unclear to what extent children are willing to adopt costs to help others, as well as how this willingness changes as children get older. Canadian 21- to 36-month-olds (N = 48) participated in four helping tasks varying in the type and degree of effort required to help (lifting force, cognitive load, the number of steps in a task, and pushing force). When costs were lower, toddlers were not only more likely to help but also provided help more readily and helped in ways that prioritized others' needs. Importantly, we found that age and how costly helping was to individual children each uniquely predicted high-cost helping, but not low-cost helping. Overall, we demonstrate that toddlers' helping is sensitive to a variety of effortful costs, while simultaneously demonstrating that maturation and individual costs appear to uniquely influence high-cost helping.