This review aims to provide information on the prevalence and frequency of adult males' pornography use. It appears, the majority (> 80%) of adult men have accessed pornography at some point, and in the past year (40-70%). Around half of younger men (25 or under) are weekly consumers. Pornography use tapers-off with age. Relatively few…

Prior research in non-U.S. samples has found a complex nonlinear relationship between loneliness and age. This research has shown that established predictors of loneliness--poor health, being unmarried, living alone, and having infrequent social interactions--help to explain age differences in loneliness. However, while some variables were found…

Respondent incentives are a popular instrument to achieve higher response rates in surveys. However, the use of incentives is still a controversial topic in the methodological literature with regard to the possible reduction or increase in response quality. We conducted an experiment in a large-scale German face-to-face study in which the…