A characteristic incident involved Koko and assistant Barbara Hiller. Koko was nesting with a number of white towels and signed, ‘that red’, indicating one of the towels. Barbara corrected Koko, telling her that it was white. Koko repeated her statement with additional emphasis, ‘that red’. Again Barbara stated that the towel was white. After several more exchanges, Koko picked up a piece of red lint, held it out to Barbara and, grinning, signed, ‘that red’.
A characteristic incident involved Koko and assistant Barbara Hiller. Koko was nesting with a number of white towels and signed, ‘that red’, indicating one of the towels. Barbara corrected Koko, telling her that it was white. Koko repeated her statement with additional emphasis, ‘that red’. Again Barbara stated that the towel was white. After several more exchanges, Koko picked up a piece of red lint, held it out to Barbara and, grinning, signed, ‘that red’.