A major open question in natural language research is the role of communicative efficiency in the origin and on-line processing of language structures. Here, we use word pairs like "chimp/chimpanzee", which differ in length but have nearly identical meanings, to investigate the communicative properties of lexical systems and the communicative…

In 3 experiments, 9-month-old infants' expectations for what distinct count noun labels refer to were investigated. In Experiment 1, a box was opened to reveal 2 objects inside during familiarization: either 2 identical objects or 2 different objects. Test trials followed the same procedure, except before the box was opened, the contents were…

Describes a paired-associate learning experiment in which American Sign Language signs of high and low translucency and high and low cheremic similarity were presented to sign-naive subjects. One hypothesis, that translucency would facilitate learning, was confirmed; a second, that cheremic similarity would retard sign learning, was not.…