“…Several factors have been found to affect performance with a CI, including, amongst others, duration of hearing loss, age, duration of CI experience, percentage of active electrodes and cognitive skills (Blamey et al, 2013;Green et al, 2007;Holden et al, 2013;Lazard et al, 2012). Different interventions aimed at improving outcomes have been tested, including computer-based auditory and speech training (Fu & Galvin, 2007;Oba et al, 2011Henshaw & Ferguson, 2013Zhang, Miller, & Campbell, 2014), group therapy (Heydebrand, Mauze, Tye-Murray, Binzer, & Skinner, 2005), and musical training (Smith, Bartel, Joglekar, & Chen, 2017;van Besouw, Oliver, Hodkinson, Polfreman, & Grasmeder, 2015). Again, all of these show variable outcomes, with some participants improving only in trained tasks, some showing benefits also in untrained tasks, and others showing little difference in performance after training for any of the measures (Henshaw and Ferguson, 2013).…”