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Comparing National Probability and Community-Based Samples of Sexual Minority Adults: Implications and Recommendations for Sampling and Measurement

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Abstract

Scientific evidence regarding sexual minority populations has generally come from studies based on two types of samples: community-derived samples and probability samples. Probability samples are lauded as the gold standard of population research for their ability to represent the population of interest. However, while studies using community samples lack generalizability, they are often better able to assess population-specific concerns (e.g., minority stress) and are collected more rapidly, allowing them to be more responsive to changing population dynamics. Given these advantages, many sexual minority population studies rely on community samples. To identify how probability and community samples of sexual minorities are similar and different, we compared participant characteristics from two companion samples from the Generations Study, each designed with the same demographic profile of U.S. sexual minority adults in mind. The first sample was recruited for a national probability survey, whereas the second was recruited for a multicommunity sample from four U.S. cities. We examined sociodemographic differences between the samples. Although there were several statistical differences between samples, the effect sizes were small for sociodemographic characteristics that defined the sample inclusion criteria: sex assigned at birth, race/ethnicity, and age cohort. The samples differed across other characteristics: bisexual respondents, respondents with less education, and those living in non-urban areas were underrepresented in the community sample. Our findings offer insights for recruiting community samples of sexual minority populations and for measuring sexual identity on probability surveys. They also bolster confidence in well-designed community samples as sources for data on sexual minority populations.

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Notes

  1. Age parameters for each cohort were established based on when respondents experienced specific LGBT-related historical events (e.g., Stonewall uprising, discovery of AIDS, legalization of same-sex marriage) in the course of their development (e.g., puberty, early adulthood). For example, the oldest cohort experienced early adulthood in the post-Stonewall era of heightened visibility and collective identity mobilization for LGBT people. By contrast, the middle cohort experienced early adulthood with the emergence of the Internet as a new tool for social interaction, and the younger cohort experienced early adulthood with the legalization of same-sex marriage and the rising visibility of sexual and gender diversity. For more details about the definition of cohorts, see Frost et al. (2019).

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Acknowledgements

Research reported in this article is part of the Generations Study, supported by the Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD) of the National Institutes of Health (NIH) under award number R01HD078526. This research was also supported by Grants P2CHD042849 and T32HD007081, both awarded to the Population Research Center at the University of Texas at Austin by the NICHD. This research was also supported by NICHD Grant P2CHD041041, awarded to the Maryland Population Research Center, and from the University of Maryland Prevention Research Center cooperative agreement U48DP006382 from the Centers for Disease Control and Prevention (CDC). The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH or CDC. The Generations investigators are: Ilan H. Meyer, Ph.D. (Principal Investigator), David M. Frost, Ph.D., Phillip L. Hammack, Ph.D., Marguerita Lightfoot, Ph.D., Stephen T. Russell, Ph.D., and Bianca D.M. Wilson, Ph.D. (Co-Investigators, listed alphabetically).

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Correspondence to Evan A. Krueger.

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Krueger, E.A., Fish, J.N., Hammack, P.L. et al. Comparing National Probability and Community-Based Samples of Sexual Minority Adults: Implications and Recommendations for Sampling and Measurement. Arch Sex Behav 49, 1463–1475 (2020). https://doi.org/10.1007/s10508-020-01724-9

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  • DOI: https://doi.org/10.1007/s10508-020-01724-9

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