Sample and Recruitment
SHOP
The aim was to include n = 50 participants, which is considered the minimum “adequate” sample size for reliability and validity studies (age 50 years or oldera minimum pure-tone threshold of 35 dB HL averaged across 1, 2, and 4 kHz in at least one earvisited a Schoonenberg HoorSupport shop for a hearing test appointment or a subsequent intake appointment no longer than 1 year ago, but was not inclined to pursue a hearing aid trajectoryowned an e-mail accountnever tried a hearing aid or ALDstill did not want a hearing aid at the time of recruitmentowned a smartphone and uses appswas fluent in Dutchwas willing to use the app regularly throughout the day for the study period.All participants provided informed consent. They received €40 for their participation. The Medical Ethics Committee of the Amsterdam University Medical Center (location VUmc), confirmed that ethics approval was not necessary because the Medical Research Involving Human Subjects Act (WMO) did not apply to the study.