Multiple measures of vowel overlap have been proposed that use F1, F2, and duration to calculate the degree of overlap between vowel categories. The present study assesses four of these measures: the spectral overlap assessment metric [SOAM; Wassink (2006). J. Acoust. Soc. Am. 119(4), 2334–2350], the a posteriori probability (APP)-based metric [Morrison (2008). J. Acoust. Soc. Am. 123(1), 37–40], the vowel overlap analysis with convex hulls method [VOACH; Haynes and Taylor, (2014). J. Acoust. Soc. Am. 136(2), 883–891], and the Pillai score as first used for vowel overlap by Hay, Warren, and Drager [(2006). J. Phonetics 34(4), 458–484]. Summaries of the measures are presented, and theoretical critiques of them are performed, concluding that the APP-based metric and Pillai score are theoretically preferable to SOAM and VOACH. The measures are empirically assessed using accuracy and precision criteria with Monte Carlo simulations. The Pillai score demonstrates the best overall performance in these tests. The potential applications of vowel overlap measures to research scenarios are discussed, including comparisons of vowel productions between different social groups, as well as acoustic investigations into vowel formant trajectories.
Come find us running our most recent experiment as part of the Lab Quests program at the Telus World of Science! This experiment is for ages 4 and up and you can compete on our leader board.
We are at the Telus World of Science from 9:30 am to 3:00 pm August 2, 3, 9, 10, 17, 18, 24, 25, 30, 31.
Thank you for your interest in our experiment!
Purpose: to investigate language comprehension in Canadian English speakers
Eligible participants are:
- Monolingual Canadian English speakers (knowledge of different languages is ok as long as English was the language spoken at home while growing up)
- 30 years old and above
- Basic hearing test
- Listening to words and nonwords, pressing a button to indicate “word” or “nonword”, typing words
- 1 hour participation; $10 Compensation
- Can participate for a maximum of 2 times on separate days
- If you are interested in participating but believe you have previously participated, please contact us and we will double check for you
Locations (click on links for directions)
Sign Up Options:
- Call us at 780-248-1409
- Email us at firstname.lastname@example.org
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Congratulations Dr. Sims on successfully defending your dissertation!
Lab meetings this semester will be held every other week starting September 9th. Anyone with an interest in phonetics is welcome to attend.