Between 1972 and 1977 , Koko was administered several infant IQ tests , including the Cattell Infant Intelligence Scale .
Between 1972 and 1977 , Koko was form B of the Peabody Picture Vocabulary Test .
Between 1972 and 1977 , Koko was administered several infant IQ tests , including the Cattell Infant Intelligence Scale and form B of the Peabody Picture Vocabulary Test .