Gua was a chimpanzee raised as though she were a human child by scientists Luella and Winthrop Kellogg alongside their infant son Donald. Gua was the first chimpanzee to be used in a cross-rearing study in the US.
Gua was brought into the Kellogg home at the age of 7+1⁄2 months, and reared with their son Donald, who was 10 months old at the time. For nine months the Kelloggs raised the two as "brother and sister", and comprehensively recorded the development of the chimpanzee and the human child. When she was around one year old, Gua often tested ahead of Donald in such tasks as responding to simple commands or using a cup and spoon.[1] Slight differences in their placement included people recognition. Gua recognized people from their clothes and their smell while Donald recognized them by their faces.
The parting difference came with language. Donald was about 16 months and Gua was a little over a year old when they had language testing. Gua could not speak, but Donald could form words. On March 28, 1932, nine months into the experiment, the Kelloggs officially ended it as Donald began to copy Gua's sounds[citation needed]. Gua was returned to the primate center with Robert Yerkes in Florida, where she was the subject of further studies by Yerkes' wife Ada. The Kelloggs returned to Indiana.
Gua died of pneumonia on December 21, 1933, less than a year after she left the Kelloggs' family and just after turning three years old.
W.N. Kellogg and L.A. Kellogg (1933) The Ape and The Child: A Comparative Study of the Environmental Influence Upon Early Behavior, Hafner Publishing Co., New York and London.
