Native Signer

A person who acquired a sign language as their first language (L1) during the critical period of language development, typically before age 5. Native signers usually learned sign language from deaf parents or through early immersion in deaf education environments. In accessibility research, native signers are essential participants for evaluating sign language technologies because they possess native-level linguistic intuitions about grammaticality, naturalness, and comprehensibility that non-native signers or hearing researchers cannot replicate. Studies involving sign language recognition, animation, or translation systems require native signer input to ensure the technology produces linguistically accurate and culturally appropriate content.