In September 2008, the AAPOR Executive Council established an Opt-In Online Panel Task
Force and charged it with “reviewing the current empirical findings related to opt-in online …

Scholars routinely employ rating scales to measure attitudes and other bipolar constructs
via questionnaires, and prior research indicates that this is best done using sequences of …

BACKGROUND There is a history of methods attempting to reduce the magnitude of social-desirability
bias, ranging from a “truth-detection device”(Nederhof, 1985, p. 272) to simpler …

BACKGroUnD In 2015, most online market research in the United States relied on nonprobability
samples. Compared with a probability-based sample of the general US population (ie, …

Slider scales and radio buttons scales were experimentally compared in horizontal and
vertical orientation. Slider scales lead to statistically significantly higher break-off rates (odds …

Allergic conjunctivitis has been reported to be increasing in prevalence in the United States.
It significantly impacts patient quality of life and reduces their productivity. It has been noted …

Background The Antibiotic Resistance Monitoring in Ocular micRoorganisms study is an
ongoing surveillance study that tracks antibiotic resistance among bacterial isolates from ocular …

Most Americans recognize that smoking causes serious diseases, yet many Americans
continue to smoke. One possible explanation for this paradox is that perhaps Americans do not …

Objective: With today's new military deployment environment, characterized by more frequent
and longer deployments, significant attention has focused on the effects of deployment on …

Objectives: We assessed validity of self-reported smoking prevalence estimates from an online
sample, and explored the impact of different item response formats on estimates. Methods…