Perlocutionary effect
A perlocutionary effect is defined as what a speaker aims an utterance to achieve in an interlocutor (to amaze, to bore, to frighten); it produces a specific consequential impact upon the feelings, thoughts, or actions of the audience [Piskorska, Chapter 10]. Some scholars regard an intended perlocutionary effect as a part of the definition of a type of illocutionary act [Glossary of Linguistic Terms].
But the perlocutionary effect of an utterance differs from the intended effect of the speaker's Illocutionary act [Baldick, p. 189].
A perlocutionary effect is, in a certain sense, external to the performance, unlike the notion of a locutionary act, describing the linguistic function of an utterance [bab.la].
An example of the perlocutionary effect of an utterance: the speaker intends to persuade X (person) to do Y (act) but instead succeeds in getting X to do Z (another act) [Crystal, p. 358].
Simply speaking, the perlocutionary effect is the impact of what you say on the addressee [Trask, p. 189].
⠀ Agnieszka Piskorska. (2016). Perlocutionary effects and Relevance Theory. Relevance Theory: Recent Developments, Current Challenges and Future Directions. Amsterdam: John Benjamins Publishing.
⠀ Chris Baldick. (2015). The Oxford Dictionary of Literary Terms. Oxford: Oxford University Press.
⠀ Perlocutionary effect. bab.la. Retrieved from: https://www.babla.ru/%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%B8%D0%B9-%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%B9/perlocutionary-effect.