Finally, a theory of speech acts examines the setting of standards for interpersonal relations through language. The basic goal for speech act theory is to explain how and when utterances in general are "performative". (1979:34) Central to the notion of speech acts are the ideas of illocutionary force and perlocutionary force, both terms coined by philosopher J.L. Austin. "Illocutionary force" describes the intent of the speaker, while "perlocutionary force" means "the effect an utterance has in the world", or more specifically, the effect on others.