Dr. Patterson began working with Koko in 1972, when Koko was a year old. She dedicated her life to studying and communicating with Koko, teaching her American Sign Language and developing a unique communication system between them.
Dr. Patterson began working with Koko in 1972, when Koko was a year old. She dedicated her life to studying and communicating with Koko, teaching her American Sign Language and developing a unique communication system between them.