Probability sampling remains the gold standard for producing results that are representative of target populations. So much so that non-probability...

Where river sampling is typically a supplemental source of responses to panel surveys, intercept surveys gather all their responses by interrupting...

People who are willing to be members of panels differ in many ways from people who aren’t. This too lessens the representativeness of panel...

One of the “magic” techniques for improvement representativeness is sample matching. The easiest way to think of sample matching is that is quota...

Given that effective sample size declines dramatically when the characteristics of the sample don’t approximate national representativeness, one...

We classified all respondents to our Sports Superstitions study as either "Unsuperstitious" or "Superstitious." A respondent had to answer "Not at...

We asked every respondent to rate their level of fear about how their actions at home might affect the team they are rooting for: while 21% of...

Convenience sampling is almost the exact opposite of probability sampling: there is no sampling frame, there is no external random selection -...

With the 2016-17 NFL season scheduled to start tonight, we thought we'd remind you to do your laundry - make sure your lucky jersey is ready! We...

A probability online panel selects candidates for participation through a probability sample (typically using Address Based Sampling) and then...

As part of an ongoing series of research into how consumers engage and identify with brands, Researchscape International surveyed 1,112 U.S. adults...