Perlocutionary act
Encyclopedia
A perlocutionary act is a speech act
Speech act
Speech Act is a technical term in linguistics and the philosophy of language. The contemporary use of the term goes back to John L. Austin's doctrine of locutionary, illocutionary, and perlocutionary acts...

, as viewed at the level of its psychological consequences, such as persuading, convincing, scaring, enlightening, inspiring, or otherwise getting someone to do or realize something. This is contrasted with locutionary
Locutionary act
In linguistics and the philosophy of mind, a locutionary act is the performance of an utterance, and hence of a speech act. The term equally refers to the surface meaning of an utterance because, according to J. L...

 and illocutionary
Illocutionary act
Illocutionary act is a term in linguistics introduced by John L. Austin in his investigation of the various aspects of speech acts. We may sum up Austin's theory of speech acts with the following example...

 acts (which are other levels of description, rather than different types of speech acts).

Unlike the notion of locutionary act
Locutionary act
In linguistics and the philosophy of mind, a locutionary act is the performance of an utterance, and hence of a speech act. The term equally refers to the surface meaning of an utterance because, according to J. L...

, which describes the linguistic function of an utterance, a perlocutionary effect is in some sense external to the performance. It may be thought of, in a sense, as the effect of the illocutionary act
Illocutionary act
Illocutionary act is a term in linguistics introduced by John L. Austin in his investigation of the various aspects of speech acts. We may sum up Austin's theory of speech acts with the following example...

via the locutionary act. Therefore, when examining perlocutionary acts, the effect on the hearer or reader is emphasized.

As an example, consider the following utterance: "By the way, I have a CD of Debussy; would you like to borrow it?" Its illocutionary function is an offer, while its intended perlocutionary effect might be to impress the listener, or to show a friendly attitude, or to encourage an interest in a particular type of music.
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