Intonation Patterns and Meaning Construction in Nigerian English: Evidence from Igbo L1 Speakers in Anambra State

Intonation is a central component of spoken English meaning construction, encoding information status, pragmatic force, and speaker attitude, yet intonation research on Nigerian English varieties remains underdeveloped relative to segmental phonology. This study examines intonation patterns and their meaning construction functions in the spoken English of Igbo L1 speakers in Anambra State, focusing on nuclear tone choice, pitch range, and boundary tone patterns in declarative, interrogative, and exclamatory utterances. Fifty participants at Chukwuemeka Odumegwu Ojukwu University produced a set of elicited speech samples including read sentences, picture description tasks, and semi-spontaneous conversation. Recordings were analysed using Praat acoustic analysis software, with tonal annotation following a ToBI-adapted scheme for West African Englishes. Results indicate that Igbo L1 speakers show a strong preference for high fall nuclear tones in declarative statements compared to the variable tone distribution reported for Standard Southern British English, producing a more emphatic intonational profile. Yes-no questions show a majority rise tone pattern consistent with Standard English conventions, suggesting intonational convergence in conventionalized question forms. Pitch range is generally wider in exclamatory constructions but narrows in formal connected speech contexts. The study contributes descriptive data on Igbo English intonation to the growing literature on Nigerian English prosody and discusses implications for oral communication instruction. Keywords: intonation, Nigerian English, Igbo L1, prosody, Anambra State.