The theory of oppositional defiant disorder and more broadly, oppositional development, is most notably attributed to David Ausubel .

Ausubel's work focused on adolescent and child development, contributing significantly to understanding how individuals navigate developmental stages, including those characterized by oppositional behaviors.

• David Ausubel:
  • Known for his work in educational psychology and developmental psychology.
  • Developed the theory of meaningful learning.
  • Contributed to the understanding of adolescent development, including oppositional behavior.