20 of the 24 subjects had a clear fitting preference. This is surprising, since the two fittings were acoustically identical. We must suppose that it is the subjects’ perception of the fitting process which determined their preferences. However, all subjects except one gave exclusively sound-related reasons for their preferences (“Sounds more clear” etc.). Thus it seems that clinicians may not always hear the ‘true’ reasons for preferences from their clients.
Bentler R, Niebuhr DP, Johnson TA, Flamme GA (2003). Impact of digital labeling on outcome measures. Ear and Hearing, 24(3), p. 215-224.
Dawes P, Powell S, Munro KJ (2011). The placebo effect and the influence of participant expectation on hearing aid trials. Ear and Hearing, 32(6), p. 767-774.