[1] Univ Western Ontario, Ctr Brain & Mind, Schulich Sch Med & Dent, Dept Physiol & Pharmacol, London, ON N6A 5K8, Canada
[2] Univ Western Ontario, Fac Sch Sci, Dept Psychol, London, ON N6A 5C2, Canada
[3] Univ Western Ontario, Fac Hlth Sci, Natl Ctr Audiol, London, ON N6G 1H1, Canada
[4] Univ Texas Dallas, Sch Behav & Brain Sci, Richardson, TX 75080 USA