Impact of Mode Switching on Nonresponse Bias in a Multimode Longitudinal Study of Young Adults

This project draws on data from the National Young Adult Health Survey (NYAHS). NYAHS is a longitudinal study of adults aged 18-34 initially recruited in 2019 through RDD sampling of cell phone numbers nationwide. Prior to recruitment, cell phone numbers were randomly assigned to one of the following modes of data collection for the main interviews: 1) telephone only, 2) telephone mostly, 3) web mostly. This project explores the impact of mode switching on young adults’ likelihood of participating in later surveys and on nonresponse bias in key survey outcomes.