Relevance Theory

Definition:

Relevance Theory is a cognitive theory of human communication and comprehension developed by Dan Sperber and Deirdre Wilson, first presented in Relevance: Communication and Cognition (1986; 2nd ed. 1995). The theory proposes that all human communication is governed by the pursuit of optimal relevance — the greatest possible cognitive effects (new information, modified beliefs, resolved questions) for the lowest possible processing effort. Rather than Grice’s multiple maxims, Relevance Theory posits a single Communicative Principle of Relevance: every act of ostensive communication (deliberate, signal-based communication) creates an expectation that the communicated stimulus is worth the effort of processing — i.e., that it achieves sufficient cognitive effects to justify its processing cost. Listeners interpret utterances by searching for the interpretation that satisfies this expectation.

Core Concepts

Cognitive effects:

An input has cognitive effects when it changes the listener’s cognitive environment — creating new contextual implications, strengthening or weakening existing assumptions. More cognitive effects = more relevant.

Processing effort:

Understanding an utterance requires cognitive effort — parsing syntax, accessing lexical meanings, identifying the speaker’s intent, computing pragmatic inferences. More effort = less relevant (all else equal).

Optimal relevance:

A stimulus is optimally relevant when it achieves sufficient cognitive effects for the processing effort it requires. Communication creates an expectation of optimal relevance: the listener assumes that the speaker’s utterance is worth processing.

Ostensive communication:

Sperber and Wilson distinguish coded communication (decoding a signal, like reading a stop sign) from ostensive-inferential communication (interpreting intentional meaningful behavior by a communicative agent). Human language use is primarily ostensive-inferential: speakers make their meaning manifest by producing stimuli that the listener is expected to interpret.

Relevance Theory vs. Gricean Pragmatics

Relevance Theory is more cognitively explicit than Grice: it attempts to explain the psychological mechanism of pragmatic inference, not just describe conversational norms.

Relevance Theory and Utterance Interpretation

The interpretive procedure, according to RT:

1. Follow a path of least effort in computing contextual effects
2. Stop when the expected level of relevance is achieved
3. The first interpretation found that satisfies the relevance expectation is adopted

This predicts that listeners do NOT consider all possible interpretations and choose the most relevant — rather, they take the first interpretation that appears sufficiently relevant. This has been supported by experimental psycholinguistic research.

Relevance Theory in SLA and Pragmatics

RT has been applied to:

• Figurative language interpretation: Metaphors, irony, and hyperbole are understood not via special interpretive rules but as attempts to achieve optimal relevance through loose use of language
• Implicature derivation: Implicatures arise from the hearer’s attempt to find the intended interpretation that satisfies the relevance expectation
• L2 pragmatic development: L2 learners may apply relevance optimization differently — deriving less-inferential, more literal interpretations due to processing effort demands in the L2 (the literal processing cost is already high, leaving less capacity for pragmatic inference)
• Cross-cultural variation: What counts as “worth the processing effort” varies — different cultures have different optimal relevance thresholds

Relevance Theory and Japanese

Japanese high-context communication can be analyzed in RT terms as deliberately creating utterances with low explicit content but high expected cognitive effects:

• Indirect no responses — the high processing effort of working out the refusal is intentionally productive rather than inefficient
• Silence and underspecification create space for the hearer to construct contextually rich interpretations
• This contrasts with low-context communication styles that prefer explicit encoding of propositional content

History

Relevance Theory was developed by Dan Sperber and Deirdre Wilson, first presented in their book Relevance: Communication and Cognition (1986, revised 1995). The theory emerged as an alternative to Grice’s (1975) cooperative principle and conversational maxims, which Sperber and Wilson argued were too vague and numerous. They proposed reducing all pragmatic principles to a single cognitive principle: human cognition is geared toward maximizing relevance — achieving the greatest cognitive effect for the least processing effort. Communication succeeds when the speaker produces an utterance that is relevant enough to be worth the listener’s processing effort. The theory has become one of the most influential frameworks in cognitive pragmatics, generating extensive research on how listeners infer meaning beyond what is literally said.

Common Misconceptions

“Relevance Theory is just a rewording of Grice’s maxims.”

Relevance Theory fundamentally differs from Gricean pragmatics: it replaces multiple cooperative maxims with a single cognitive principle, treats communication within a general theory of cognition rather than as a cooperative convention, and provides an explicit cognitive mechanism (relevance-guided inference) for how listeners derive speaker meaning.

“‘Relevant’ means ‘on topic.’”

In Relevance Theory, relevance is a technical term: an input is relevant when it yields positive cognitive effects (new conclusions, strengthened or contradicted assumptions) at minimal processing cost. This is different from everyday “relevance” or conversational topic-relevance.

“Listeners always arrive at the correct interpretation.”

Relevance Theory predicts that listeners follow the path of least effort and stop at the first interpretation that meets their expectation of relevance. This may not be the intended interpretation — misunderstandings occur when the first adequately relevant interpretation differs from what the speaker intended.

“Relevance Theory only applies to verbal communication.”

The theory is a general cognitive framework that applies to any ostensive communicative act — including gesture, visual communication, and non-verbal signals — not just spoken or written language.

Criticisms

Relevance Theory has been criticized for unfalsifiability: the claim that cognition is relevance-oriented is argued to be too general to test experimentally, and any communicative behavior can potentially be explained post hoc as relevance-maximizing. The theory’s predictions about processing effort and cognitive effects are difficult to measure independently, making empirical validation challenging.

Gricean pragmatists have argued that reducing all pragmatic principles to a single relevance principle loses the explanatory specificity of individual maxims — the Quantity maxim (say enough but not too much) and Manner maxim (be clear) capture distinct communicative phenomena that a single relevance principle conflates. Additionally, the theory has been criticized for underemphasizing social and cultural factors in communication — treating inferential processes as primarily cognitive while giving less attention to the social conventions that shape interaction.

Social Media Sentiment

Relevance Theory is discussed in academic linguistics communities but has no presence in language learning spaces. Its principles are indirectly relevant to learner experience — the effort of processing L2 input and the difficulty of inferring speaker meaning are core challenges of language learning — but learners do not frame these experiences in Relevance Theory terms.

In linguistics education communities, Relevance Theory is often contrasted with Gricean pragmatics as part of introductory pragmatics courses, generating discussion about which framework better explains conversational inference.

Practical Application

1. Understand the effort-effect balance — As an L2 listener, processing effort is higher than for native speakers. Increase your automatic processing ability (vocabulary, grammar) to reduce effort and free cognitive resources for inferring speaker meaning.
2. Don’t over-process — When interpreting L2 utterances, consider the first interpretation that makes sense in context rather than exhaustively analyzing all possible meanings. This mirrors the relevance-theoretic processing strategy that native listeners use.
3. Make your speech optimally relevant — When speaking in L2, provide enough context for your listener to reach your intended meaning without excessive processing effort. Over-implicit or over-explicit communication both create relevance problems.
4. Build contextual knowledge — Relevance Theory shows that interpretation depends on accessible context (background assumptions). Building cultural and situational knowledge about your target language community improves your interpretive accuracy.

Related Terms

• Conversational Implicature
• Cooperative Principle
• Pragmatic Competence
• Speech Act Theory
• Discourse Analysis

See Also

• Conversational Implicature
• Cooperative Principle
• Pragmatic Competence
• Sakubo

Research

Sperber and Wilson (1986/1995) is the foundational text. Wilson and Sperber (2004) provided an updated summary of the theory’s development. Carston (2002) extended Relevance Theory’s treatment of explicit communication and the semantics-pragmatics boundary.

For SLA, Relevance Theory has been applied to explain L2 pragmatic development: Jodlowiec (2010) argued that L2 learners’ pragmatic difficulties can be understood as relevance-processing challenges — higher processing effort in L2 reduces the cognitive resources available for pragmatic inference. Zegarac and Pennington (2000) applied Relevance Theory to cross-cultural communication, proposing that misunderstanding arises when speakers from different cultures have different contextual assumptions available, leading to different relevance-guided interpretations of the same utterance.