Table 2. Use of trained and untrained items and voices in different tasks.

Task	Items	Voice
Picture identification	Trained	One trained voice (counterbalanced, see Table 3) One untrained voice (counterbalanced, see Table 3)
Three interval oddity (Pre and Post)	Trained and untrained	Four new voices
Picture naming	Trained	NA
Word repetition (Pre and Post)	Trained and untrained	One trained voice (counterbalanced, see Table 3)
Individual aptitude test 1 Pitch contour perception test (Pre and post)	Vowels	Four untrained voices
Individual aptitude test 2 Categorisation of synthesised tonal continua (Pre and Post)	Synthesised voice	Synthesised voice