Joseph Walther is a prominent figure in the field of communication studies, known for his research on interpersonal communication and computer-mediated communication. He has contributed significantly to understanding how technology affects human interactions, particularly through social media and online platforms. Walther is best known for developing the Social Information Processing Theory, which explains how people form relationships and communicate effectively in online environments. His work has influenced both academic research and practical applications in areas such as psychology, sociology, and media studies.