>>35950936Studies in the field generally focused on picking unusual instances out of thousands of hours footage, rather than systematically studying whether apes expressed meaningful ideas. When Terrace did this, he found that interesting sentences began to look like drops in the ocean.
Most of that footage demonstrated the apes producing word salads that contained signs for food or affection they desired. Usually these sentences were very short, and in no sense grammatical. Terrace noted that nearly all Nim’s sentences were two or three words long; extended sentences were very rare. The general pattern was: Nim or me followed by eat, play, tickle, banana, grape, or the like. Human children begin with short sentences. But they rapidly develop the ability to form longer sentences, conveying meaningful thoughts, asking questions, and expressing new ideas. Nim never did any of these things.