Data collection
Data were collected between September 18, 2017, and June 30, 2018. The mH-L, mH, and control groups each completed a pretest survey (T0), two post-test surveys at T1 (Week 8), and a follow-up test at T2 (Week 20). The method for data collection was a paper-based self-administered questionnaire survey.The research instruments consisted of structured questionnaires, used with permission from the original developers and translators. The questionnaires included sociodemographic characteristics, healthcare behaviors for young children, eHealth literacy, and family strength. The instruments utilized Korean, English, Chinese, and Vietnamese translations, meaning that participants could either select the Korean version or that in their native language. The instruments were translated by a professional organization, which was a translation and interpretation cooperative founded by a group supporting immigrant women. The instruments were translated by immigrant women who were fluent in Korean and their native language, and the translated content was further edited to improve its validity.