The marshmallow experiment is associated with which researcher?

• A. Erik Erikson
• B. Albert Bandura
• C. Carl Rogers
• D. Walter Mischel

Answer: (D)

The main concept here is identifying who conducted a famous study on self-control and delay of gratification. The marshmallow task was designed by Walter Mischel in the 1960s at Stanford. In the setup, a child could have one marshmallow right away or wait and receive two later. This experiment became a cornerstone in discussions about self-control and how early regulation can relate to later outcomes, though later work shows the connections are more nuanced than once thought. The other researchers listed—Erik Erikson, Albert Bandura, and Carl Rogers—are prominent for different theories and contributions (psychosocial development, social learning theory, and client-centered therapy, respectively), but they did not conduct this marshmallow study.