Henry L. Roediger III is a prominent American psychologist known for his research in the field of memory and learning. He has made significant contributions to understanding how people remember and forget information, particularly through his work on the testing effect, which highlights the benefits of retrieval practice in enhancing memory retention. Roediger has authored numerous articles and books, including the widely used textbook Memory, which serves as a resource for students and professionals alike. He is also a co-founder of the Journal of Applied Research in Memory and Cognition, furthering the study of cognitive psychology and its applications in real-world settings.