Roger V. M. D. C. Mehrabian

Roger V. M. D. C. Mehrabian was a renowned psychologist and researcher known for his work on communication and nonverbal behavior. He is best known for his "7%-38%-55% Rule," which suggests that in face-to-face interactions, only about 7% of communication is conveyed through words, while 38% is through tone of voice, and 55% through body language and facial expressions. This underscores the importance of nonverbal cues in understanding and effective communication beyond just spoken words. His research has significantly influenced fields like interpersonal communication, psychology, and business.