14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

The McGurk Effect and !Xóõ Clicks

Anthony Traill

University of the Witwatersrand, Johannesburg, South Africa

Visual information can influence the perception of speech sounds, particularly concerning place of articulation (POA). However, the perception of manner features relies on the auditory modality. This study explores these factors with the five basic click consonants of !Xóõ, a San language. The clicks utilize labial or corono-dorsal POA and thus allow for the replication of POA-by-visual-effect-manipulation used in studies employing conventional speech sounds. Since click contrasts rely on a number of salient manner distinctions involving spectral emphasis, intensity, and noisiness, it was hypothesized that the auditory stimulus would over-ride conflicting visual cues, particularly where labial POA was not cross classified for the abrupt click types. Results provide weak confirmation for the hypothesis when auditorily salient features over-ride conflicting visual cues. In other cases visual cues strongly influence perception.

Full Paper

Bibliographic reference.  Traill, Anthony (1999): "The mcgurk effect and !Xóõ clicks", In ICPhS-14, 1933-1935.