Animal Language
While the term "animal languages" is widely used, most researchers agree that they are not as complex or expressive as the human language. They argue that there are significant differences separating human language from animal communication even at its most complex, and that the underlying principles are not related.
Other researchers argue that an evolutionary continuum exists between the communication methods these animals use and human language. Everybody agrees that human language is more complex than communication between animals. For more on communication among non-human animals, see The Animal Communication Project.
These are the properties of human language that are argued to separate it from animal communication:
- 'Arbitrariness:' There is no relationship between a sound or sign and its meaning.
- 'Cultural transmission:' Language is passed from one language user to the next, consciously or unconsciously.
- 'Discreteness:' Language is composed of discrete units that are used in combination to create meaning.
- 'Displacement:' Languages can be used to communicate ideas about things that are not in the immediate vicinity either spatially or temporally.
- 'Duality:' Language works on two levels at once, a surface level and a semantic (meaningful) level.
- 'Metalinguistics:' Ability to discuss language itself.
- 'Productivity:' A finite number of units can be used to create an infinite number of ideas.
Research with apes, such as the research Francine Patterson has done with