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Andrew Pereira, McNair Scholar

Mentor: Dr. Jane Simone, Dept. Psychology at University of Washington


Over the past two decades, men who have sex with men (MSM) have engaged in increasing consumption of MSM-specific sexually explicit online media (i.e., online pornography). Furthermore, the amount of MSM-specific sexually explicit online media portraying unprotected anal intercourse (UAI) has increased, raising concerns about HIV transmission among the actors and the potential encouragement of risky sex among consumers. The influence of sexually explicit online media on sexual risk-taking, at present largely understudied, could lead to new avenues for innovative HIV-prevention strategies targeting at-risk MSM. In this preliminary assessment, in-depth qualitative interviews were conducted with 16 MSM in the Seattle area to elucidate MSM’s perceptions about the influence of sexually explicit online media on their own and other MSM’s sexual behaviors. Participants reported that sexually explicit online media: (1) plays an educational role, (2) increases comfort with sexuality, and (3) sets expectations about sexual behaviors. While participants overwhelmingly reported not feeling personally influenced by viewing UAI in sexually explicit online media, they believed viewing UAI increased sexual risk-taking among other MSM. Specifically, participants reported that the high prevalence of UAI in sexually explicit online media sends the message, at least to other MSM, that (1) engaging in UAI is common, (2) UAI is acceptable and “ok” to engage in, and (3) future partners will desire or expect UAI. Overall, this preliminary assessment indicates that sexually explicit online media exposure may have both positive (e.g., helping MSM become more comfortable with their sexuality) and negative (e.g., normalizing UAI) impacts on the sexual health of MSM and may be useful in the development of novel HIV-prevention interventions.

Nelson, K.M., Leickly, E., Yang, J.P., Pereira, A,, & Simoni, J. M. (2014). The influence of sexually explicit online media on sex: do men who have sex with men believe they “do what they see”? In AIDS Care: Psychological and Socio-medical Aspects of AIDS/HIV.

Grace Cooper, McNair Scholar

Mentor: Dr. Julia Smith, Dept. Anthropology Eastern Washington University  


This study discusses the perceptions and understandings of code-switching of bilingual English-Spanish speakers from the Inland Northwest. Earlier studies reported that speakers generally hold a negative view of code-switching; however, results of this study questions whether these conclusions remain true. Results from ten, hour-long semi-structured interviews including four musical selections as examples of code-switching demonstrate a shift away from traditional views towards code-switching. Rendering, older studies problematic this study calls for the continuation of code-switching research as well as new and inventive approaches for researching code-switching in the future.

Grace Cooper. “An Exploration of Intentions and Perceptions of Code-switching Among Bilingual Spanish-English Speakers in The Inland Northwest.” In Journal of Northwest Anthropology, 47(2):119-129. 2013.

Michelle Keller, McNair Scholar

Mentor: Dr. Joanna Joyner Matos, Dept. Biology, Eastern Washington University  


We explored the relationship between relaxed selection, oxidative stress, and spontaneous mutation in a set of mutation-accumulation (MA) lines of the nematode Caenorhabditis elegans and in their common ancestor. We measured steady-state levels of free radicals and oxidatively damaged guanosine nucleosides in the somatic tissues of five MA lines for which nuclear genome base substitution and GC-TA transversion frequencies are known. The two markers of oxidative stress are highly correlated and are elevated in the MA lines relative to the ancestor; point estimates of the per-generation rate of mutational decay (ΔM) of these measures of oxidative stress are similar to those reported for fitness-related traits. Conversely, there is no significant relationship between either marker of oxidative stress and the per-generation frequencies of base substitution or GC-TA transversion. Although these results provide no direct evidence for a causative relationship between oxidative damage and base substitution mutations, to the extent that oxidative damage may be weakly mutagenic in the germline, the case for condition-dependent mutation is advanced.

Joyner-Matos, J., Hicks, K. A., Cousins, D., Keller, M., Denver, D. R., Baer, C. F., and S. Estes. 2013. Evolution of a Higher Intracellular Oxidizing Environment in Caenorhabditis elegans Under Relaxed Selection. PLOS ONE

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