Chimpanzee language research: Status and potential

The impact of ape-language research upon current thought pertaining to language and man in relationship to the apes is discussed within an evolutionary framework. Studies of apes can reveal certain requisites to the language skills of humans. Social adaptations are thought to be important to the evolution of those requisites. A review of ape-language research is made, with emphasis given to the problems of controls where work is doneen face with the subjects, as where Ameslan (signing) is the system employed. The need for careful definition of what is a “word,” and the need for tracing through experience how responses come to acquire meaning, hence “wordness,” is emphasized. Levels of wordness are discussed which emerge initially from basic operants and performatives. Evidence is reported in support of the conclusion that it is through direct experience, through the pragmatic application and use of instruments, and through important social relationships that word learning is facilitated. Finally, it is noted that an important step of validation in our own work is in the successful application of methods emanating therefrom to work with mentally retarded children.