RESEARCHERS AT Harvard University have evidence that monkeys can understand the difference between prefixes and suffixes, showing that animals may have more capacity to learn language than previously thought.
In a study in Biology Letters journal, Ansgar Endress and his colleagues tested 14 cotton-top tamarins to see if they could learn the linguistic rule that adds “-ed” to create the past tense, as in transforming “kick” to “kicked”.
The scientists used the nonsense syllable “shoy” as a base. Then they added prefixes and suffixes such as “ba, pu, di, ki, lu, ro and mo”, and played the monkeys recordings of humans saying these “words”.
One group became familiar with prefixes, such as “ba-shoy” and “mo-shoy”, and the other group heard suffixes, such as “shoy-ba” and “shoy-mo”.
On testing day, the researchers played a recording of words, half of which stuck to the monkey’s familiarisation pattern and half of which violated it – similar to saying “kicked” and “edkick”.
When the tamarin turned his head at least 60 degrees towards the speaker, the researchers counted this as a response. The human equivalent would be if someone said, “The girl edkick the ball”, and the listener cocked his head as if to say, “What?”
Dr Endress said he “would be surprised” if the ability to understand prefixes and suffixes was limited to humans and primates. – (LA Times- Washington Post service)