Results from these two studies show that fast mapping--gaining information about a word from how it is used in a sentence, what words it is contrasted with, and other factors--can be used successfully by children two to four years old to form quick and rough hypotheses about the meaning of a word. (PCB)

A discussion of the functions of human communication shows that underlying them is the cognitive process by which people have the ability to take the view of others, to internally represent reality, and to take into account knowledge and experience to choose future actions. These features of decentration and abstraction reveal the link between…

A collection of research materials on sign language and primatology is presented here. The essays attempt to show that: sign language is a legitimate language that can be learned not only by humans but by nonhuman primates as well, and nonhuman primates have the capability to acquire a human language using a different mode. The following…