It was by chance as these things tend to happen on the net that I read about High Variability Pronunciation Training (HVPT). What are the odds language teachers know about HVPT?
My extremely representative and valid polling on Twitter and G+ gave me a big fat 2 out of 24 teachers who knew the acronym. Of the two who said yes one had looked up the acronym and the other is an expert in pronunciation.
I would put good odds that most language teachers have heard of and use minimal pairs, i.e. pairs of words which differ by one sound, the famous ship/sheep for example.
HVPT can be seen as a souped up minimal pairs where different speakers are used and sounds presented in different contexts. Learners are then required to categorize the sound by picking a label for the sound. Feedback is then given on whether they are correct.
Pronunciation research has shown that providing a variety of input in terms of speakers and phonetic contexts helps learners categorize sounds. That is the V of variability in the acronym. Furthermore such training focuses learners on the phonetic form and thus reduces any effect of semantic meaning since it has been shown that attending to both meaning and form reduces performance.
Currently there is one free (with registration) program that helps with Canadian pronunciation it is called EnglishAccentCoach.1 This web and IOS program is developed by Ron Thompson a notable researcher in this field. It is claimed that it can significantly help learners in only 8 short training sessions and effects last for up to a month. There is a paid program called UCL Vowel Trainer2 which claims learners improved from 65% accuracy to 85% accuracy over 5 sessions.
Another (open source) program is in development called Minimal Bears which is based on PyPhon.3 MinimalBears aims to build up crowdsourcing feature so that many languages can be accommodated. Interested readers may like to see a talk about HVPT from the developers.4
So it is quite amazing as Mark Liberman from Language Log pointed out how little is known by language educators about HPVT. One of the commenters to the Language Log post suggested association with drill and kill stereotypes of language learning may have tainted it. No doubt more research is required to test the limits of HPVT. Hopefully this post will pique interest in readers to investigate these minimal pairs on steroids.
Many thanks to Guy Emerson for additional information and to the poll respondents.
2. UCL Vowel Trainer
3. PyPhon I have yet to be able to get this working
4. (video) High Variability and Phonetic Training – Guy Emerson and Stanisław Pstrokoński
Thomson, R. I. (2011). Computer assisted pronunciation training: Targeting second language vowel perception improves pronunciation. Calico Journal, 28(3), 744-765. Retrieved from http://www.equinoxpub.com/journals/index.php/CALICO/article/viewPDFInterstitial/22985/18991
Liberman, M. (2008, July 6) HVPT [Blog post]. Retrieved from http://languagelog.ldc.upenn.edu/nll/?p=328