International Conference on Auditory-Visual Speech Processing 2008

Tangalooma Wild Dolphin Resort, Moreton Island, Queensland, Australia
September 26-29, 2008

A, V, and AV Discrimination of Vowel Duration

Björn Lidestam

Department of Behavioural Sciences and Learning, Linköping University, Sweden

Discrimination of vowel duration was explored with regard to JNDs, error bias, and effects of modality and consonant context. 90 normal-hearing participants discriminated either auditorily, visually, or audiovisually between pairs of stimuli differing with regard to duration of the vowel /a/. Duration differences varied in 24 steps: 12 with the first token longer and 12 with the second token longer (33-400 ms). Results: accuracy was lower for V than A and AV; step difference affected performance in all modalities; error bias was affected by modality and consonant context; and JNDs (> 50% correct) were not possible to establish.

Full Paper

Bibliographic reference.  Lidestam, Björn (2008): "A, v, and AV discrimination of vowel duration", In AVSP-2008, 159-162.