Measuring sexual behaviours and attitudes in hard-to-reach groups: A comparison of a non-probability web survey with a national probability sample survey

Introduction: Hard-to-reach and minority groups are often at higher risk for adverse sexual health outcomes. While such groups are therefore of
interest to sexual health researchers, it can be difficult to locate and recruit sufficient sample sizes using probability sampling methods. This study
aims to establish whether web-panel surveys can provide a viable less resource intensive means of boosti…