Herek noted that most of the Cameron group's academic publications in the past 15 years have been based on a survey study conducted in 1983 and 1984. The main survey was completed in seven U.S. cities and towns in 1983. Data were later added from a 1984 Dallas (TX) sample. Most of the Cameron group's papers have reported data from the combined samples. According to Herek, a critical review of the Cameron group's sampling techniques, survey methodology, and interpretation of results reveals at least six serious errors in their study. Herek concludes, "an empirical study manifesting even one of these six weaknesses would be considered seriously flawed. In combination, the multiple methodological problems evident in the Cameron group's surveys mean that their results cannot even be considered a valid description of the specific group of individuals who returned the survey questionnaire. Because the data are essentially meaningless, it is not surprising that they have been virtually ignored by the scientific community." "The Cameron group has published its empirical research in academic journals with low prestige and, at least in the case of Psychological Reports, with a low rejection rate. Other than the Cameron group itself, researchers have not cited their empirical studies as a source of ideas for new research on sexual orientation. Nor have scientists cited the group's papers to support assertions about the dangers to society posed by homosexuals."