“…There is considerable research indicating that performance on perceptual tasks is susceptible to improvement with training (e.g. Ahissar, 1999Ahissar, , 2001Aiken & Lau, 1967;Annett, 1966;Annett & Patterson, 1967;Cuddy, 1968;Lunn, 1948;Prather, Berry, & Bermudez, 1972;Proctor & Dutta, 1995;Sidley, Winograd, & Bedarf, 1965;Swets, Millman, Fletcher, & Green, 1962), including perceptual learning specific to audition (Cuddy, 1968). Cuddy's results indicated not only that training could alter the performance of untrained subjects, but also that the focus of the training programme was an important factor in the amount of improvement attained (Cuddy, 1968;Heller & Auerbach, 1972).…”