For the dual-task experiment, six SNR conditions (0, 12, 14, 16, 18, and 110 dB) based on results from the SNR-50 were presented randomly to the participants. These SNR conditions were selected based on (a) previous research (Wu et al, 2016) which showed that RT on the Stroop reached a peak at the SNRs where participants’ achieved 40–50% for speech recognition on the primary task and (b) our experiences with CI users that require a more positive SNR to achieve this level of speech recognitionperformance.Inaddition,onebaselinecondition was included to assess secondary task performance on the Stroop test in quiet, consistent with the methodology from other studies of listening effort that have also measured baseline performance in quiet (Hick and Tharpe, 2002; Gosselin and Gagn´e, 2011). For all conditions includingtheprimaryspeechperceptiontask,20sentences were presented per condition, and consequently, 20 reaction times weremeasured. Frequent breakswere provided throughout the dual task to each participant as needed.