Definition:
A clarification request is a conversational move in which one interlocutor signals that the other’s utterance was not understood (or only partially understood) and asks for repetition, rephrasing, or elaboration. In SLA, clarification requests are a primary mechanism of negotiation of meaning — they push learners to modify their output and attend to form, making them a powerful source of comprehensible input and implicit corrective feedback.
In-Depth Explanation
Forms of Clarification Requests
Clarification requests range from general to specific:
- Open requests: “What?” / “Sorry?” / “Pardon?” / “What do you mean?”
- Repetition requests: “Could you say that again?”
- Specification requests: “What do you mean by [X]?”
- Confirmation checks: “Did you say [X]?” (partially overlaps with clarification)
- Non-verbal signals: Confused facial expression, head tilt, furrowed brow
Role in SLA
Michael Long’s Interaction Hypothesis identifies clarification requests as a central mechanism of language development. When a learner says something a native speaker doesn’t understand, the resulting negotiation sequence forces the learner to:
- Notice that their output was unclear (triggers noticing)
- Modify their output — rephrase, simplify, or correct (produces pushed output)
- Attend to form — the gap between what they said and what they meant becomes salient
This is different from explicit correction. A clarification request doesn’t tell the learner what was wrong — it signals a communication breakdown and pushes the learner to solve it themselves.
As Corrective Feedback
In classroom and conversational contexts, clarification requests function as implicit corrective feedback. When a teacher responds to an error with “What do you mean?” rather than “No, the correct form is X,” the learner must self-correct, which involves deeper processing.
Research (Lyster & Ranta, 1997) shows that clarification requests generate more uptake (learner modification of output) than recasts, precisely because they require active reformulation rather than simple repetition.