By Courtney Kennedy, Andrew Mercer, Scott Keeter, Nick Hatley, Kyley McGeeney and Alejandra Gimenez As the costs and nonresponse rates of traditional, probability-based surveys seem to grow each year, ...

Many epidemiologic studies forgo probability sampling and turn to nonprobability volunteer-based samples because of cost, response burden, and invasiveness of biological samples. However, finite ...

With few exceptions, much of sexual science builds upon data from opportunistic nonprobability samples of limited generalizability. Although probability-based studies are considered the gold standard ...

One possible explanation for the variability in estimates across the different nonprobability samples is the range of methods that online sample vendors employ. They differ on recruitment, weighting ...

Comparison of probability (simple random sampling) and non-probability sampling (convenience sampling) methods. R code for simulating a convenient sample, simple random sample, and compare bias and ...

Comparison of probability (simple random sampling) and non-probability sampling (convenience sampling) methods. R code for simulating a convenient sample, simple random sample, and compare bias and ...