ABOUT MATTHEW AJIBADE
My research sits at the intersection of phonetics, phonology, and speech perception, with a central focus on Yoruba and other understudied West African languages. I investigate how listeners with different language experiences- such as heritage speakers, second language learners, and native speakers- perceive and process complex phonological contrasts. A key strand of my work examines the perception of labial-velar stops, which are typologically rare sounds that offer rich insights into models of phonological representation and cross-linguistic speech processing.
Grounded in experimental methodologies, my research draws from acoustic analysis, behavioral perception tasks, and advanced statistical modeling. I am particularly interested in how language experience shapes the phonological grammar and the extent to which perceptual learning is influenced by native-language categories. My dissertation, supported by the NFMLTA-NCOLCTL Research Award, advances empirical and theoretical contributions to models of speech perception, including the Perceptual Assimilation Model (PAM), the Speech Learning Model (SLM), and Second Language Linguistic Perception (L2LP).
I earned my Ph.D. in Linguistics from Indiana University, where I specialized in phonological perception and African linguistics. Beyond my core phonological research, I also engage in work on Yoruba language pedagogy and the integration of digital tools- such as artificial intelligence- for teaching and learning African languages. I currently serve as a Visiting Lecturer in the African Studies Program at Indiana University, where I teach Yoruba language and culture and contribute to curriculum development and community engagement.
Research Interests
General Linguistics, Phonetics-Phonology, Phonological Acquisition, Labial-velars,
L2 & Heritage Phonology, African Languages and Linguistics, African Language Pedagogy
Ajibade, Matthew (2025). Heritage perceptual phonological advantage over non-native listeners is not a universal phenomenon. In Aditya, Yedetore, Rebecca D. Bonney, & Yuanyuan Zhang (eds.), BUCLD 49: Proceedings of the 49th Annual Boston University Conference on Language Development, (35-47). Somerville, MA: Cascadilla Press.
January 2026. Ajibade, Matthew. (2026, January 8-11). Early input and the uneven acquisition of phonological contrasts. [Oral Presentation]. 2026 LSA Annual Meeting. New Orleans, Louisiana.
February 2026. Ajibade, Matthew & Bonney, Rebecca D. (2026, February 27-28). African Languages and the Expansion of Heritage Phonology Research. Fifth International Conference on Heritage/Community Languages. Los Angeles: UCLA
Ajibade, Matthew (2025, October 10-11). When early exposure isn’t enough: contrast-specific effects in Yoruba phonological perception [Oral Presentation]. The 30th Mid-Continental Phonetics and Phonology Conference (MidPhon 30), Indiana University Bloomington.
Ajibade, Matthew (2025, May 15-17). Perceptual comparison of voicing distinctions across labial-velar, labial, and velar stops. 56th Annual Conference on African Linguistics (ACAL) [Oral Presentation]. Twin Cities: MN: University of Minnesota.
Ajibade, Matthew, Darcy, Isabelle, & De Jong, Kenneth (2025, April 23-25). CV transitions and L1 experience explain perceptual discrimination of Yoruba labial-velar stops [Oral Presentation]. New Sounds. Toronto, Canada: University of Toronto.
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Lab Membership
I am a member of the Second Language Psycholinguistics Lab and the Phonetics & Phonology reading (Phlegme) group.