Influences of talker gender on second language speech perception

Abstract

This study examined how talker gender information may influence second language speech perception. The participants were ten right-handed male Japanese adults with normal hearing. The speech stimuli were two minimal pairs of English words, “heed-hod” and “head-had”, recorded from twenty male and twenty female native English speakers. The stimuli were delivered binaurally at a sensation level of 50 dB. In the gender recognition task, the subjects were asked to judge talker gender. In the vowel recognition task, they were asked to identify the vowel category. Magnetoencephalography data were recorded during the experiment. For gender recognition, there was no significant difference in identification accuracy between the two word pairs while reaction time was significantly faster for the difficult “head-had” pair. In the phoneme recognition task, there was a significant phoneme*gender interaction for the difficult “head-had” pair but not for the easy “heed-hod” pair. The MEG data for gender recognition showed right hemisphere dominance, and the phoneme recognition task showed overall bilateral activation. Time-frequency analysis further revealed distinctions between male and female voices and the difficulty differences for the two word pairs in the phoneme recognition task. The results suggest a complex role of paralinguistic gender information in L2 speech perception.