What methodology is Lightner Witmer known for in the field of psychology?

Lightner Witmer is known as the founder of school psychology, which highlights his significant contributions to the field. He established the first psychological clinic at the University of Pennsylvania in 1896, where he focused on assessing and providing services for children with learning difficulties. Witmer's work emphasized the application of psychological principles in educational settings, aiming to understand and address the needs of students more effectively. His approach laid the foundation for what would become the school psychology profession, demonstrating the importance of behavioral and cognitive assessments and interventions tailored to improve learning outcomes.

While structuralism, developmental psychology, and behaviorism represent important areas within psychology, they do not specifically capture Witmer's primary focus and impact in the realm of education and psychological assessment in schools.