According to Hyman (2001) and Gussenhoven (2004), languages with
downstep in declarative sentences suspend downstep in interrogative
sentences, and for Yoruba, a language with downstep in declaratives
(Laniran 1992; Connell & Ladd 2001; Laniran & Clement 2003) downstep
suspension in questions is expected. However, this claim does not hold
universally. For instance for Akan, no suspension of downstep in polar
questions has been observed (Kügler 2016). Therefore, this study
compares the intonation of declarative sentences in Yoruba with that
of polar interrogative sentences to investigate the role of downstep
suspension in Yoruba.