3
Lana produced had to be learned over many trials. Additionally, as Wallman (1992) notes, there
is a problem with this and many of the ape-language studies because ‘there is no evidence to
suggest that Lana had any notion of the meaning of “please” or even a child’s rudimentary
understanding of the sociolinguistic rules governing its usage’.
5. Nim Chimpsky and Chimpskyan revolution
Still other experiments in teaching chimpanzees sign language have produced
contradictory results. The achievements of a chimpanzee named Nim have been interpreted by
his teachers as consisting of frequent repetitions of a small number of all-purpose signs (NIM,
ME, YOU, EAT, DRINK, MORE, and GIVE) that were largely appropriate to any context.
These signs are said to have made up almost 50 percent of Nim’s production. Furthermore, there
are no reports of his engaging in creative combining of signs.
6. Sarah: the magnetic token chimp
David Premack of the University of Pennsylvania involved a chimp by the name of
Sarah. Premack gave Sarah 130 plastic tokens with magnets so that they could be manipulated
easily by her and others. These included tokens for the names of colours such as ‘red’ and ‘blue’
for different fruits such as ‘banana’ and ‘peach’, and for actions such as ‘wash’, ‘cut’, and ‘take’.
7. Koko: the signing gorilla
Francine Patterson (1978a, 1978b, 1980) repots remarkable results with the gorilla Koko,
born in 1971, which she has trained in American Sign Language and speech since 1972. Unlike
Washoe, Koko received speech input from her trainers as well as sign and speech exposure, with
help in molding the hands for sign making.
One interesting fact Patterson discovered was that Koko was productive in her sign
language. Koko could make new word to describe new objects by combining previously known
ones. Koko, for example, created ’eye-hat’ for mask, ‘white-tiger’ for a toy zebra, ‘finger-
bracelet’ for ring, and ‘bottle-match’ for a lighter. Human languages, of course, include similar
devices for word-making, e.g. ‘blackbird’ in English and ‘white bird’ for swan in Japanese.
After four-and-a half years of instruction Koko had learned 132 sign words. After 10
more years that total came to 500 or more. This is impressive compared to the achievements of
the chimpanzees; it is below the level, though, of that of 3 –year-old human child, whose
vocabulary, Koko’s syntax has not progressed beyond the same elemental level as that of the
chimpanzees who were taught language, i.e. two or three words utterances.
As far as speech is concerned, it is claimed that Koko is able to comprehend in speech
whatever she can understand in sign (Patterson & Lindeln, 1981). Patterson also reports that
Koko uses her signs for such purposes as to swear, rhyme, joke, and lie. She further states that
Koko can refer to past incidents, thus showing one of the cardinal characteristics of human
language, displacement, i.e, the ability to refer to events removed in time and place from the act
of communication. For example, when asked in sign, ‘you remember what you had for
breakfast?’ she replied with the sign, ‘yes, cake’ (Patterson, 1980, p.540). the fact, that Koko said
‘cake’ as a response indicates that she at least knew the word ‘breakfast’ and associated cake
with breakfast.