Question

This person's work on cognitive stages of development was not widely accepted under behaviorism, was welcomed by cognitive theorists, and finally was rewarded by mainstream psychology when he became the first European psychologist to receive the APA Distinguished Scientific Contribution Award.

Answer 1

Jean Piaget.

Step-by-step explanation:

While Jean Piaget described himself as a genetic epistemology, his contribution to the field of psychology, education and natural science. one of the most influential psychologist of the twentieth century he not only developed the constructivist theory but he also inspired other great psychologist such as Howard Gardner and Robert Sternberg. American Psychologist Association awarded him with the Distinguished Scientific Contribution award for his contribution to the field of Psychology.