A University of Washington study finds that 18-month-old toddlers conduct a form of cost-benefit analysis, making choices based on how much effort they want to expend, or on whether they like the people involved.


A University of Washington study finds that 18-month-old toddlers conduct a form of cost-benefit analysis, making choices based on how much effort they want to expend, or on whether they like the people involved.

University of Washington researchers argue that further study of why infants persist, and to what end, may shed new light on how they learn and what the future yields.