Harvey EJ, Rubin LF, Smiley SL, Zhou Y, Elmasry H, Pearson JL
JMIR Mhealth Uhealth.;6(2):e21. doi: 10.2196/mhealth.8123.
Rather than providing participants with study-specific data collection devices, their personal mobile phones are increasingly being used as a means for collecting geolocation and ecological momentary assessment (EMA) data in public health research. The purpose of this study was to (1) describe the sociodemographic characteristics of respondents to an online survey screener assessing eligibility to participate in a mixed methods study collecting geolocation and EMA data via the participants’ personal mobile phones, and (2) examine how eligibility criteria requiring mobile phone ownership and an unlimited text messaging plan affected participant inclusion.