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Susan Murphy, 2013 MacArthur Fellow

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April 13, 2015

LCA Stata PluginThe Methodology Center is pleased to release the latest version (1.2) of the LCA Stata plugin for conducting latent class analysis (LCA). We improved the plugin based on user feedback. Specifically, we altered the plugin to prevent lower versions of Stata from generating errors based on the matrix size used in the analysis. As always, the software is available for download free of charge, though you need Stata to run it. For an overview of the functionality of the LCA Stata plugin, please visit the download page. The users’ guide has also been updated. Please email with any questions or feedback.

Read more or download the software.

Megan Patrick, Ph.D.

March 12, 2015

Congratulations to Methodology Center Affiliate Megan Patrick and the team of researchers from Penn State’s Methodology Center and the University of Michigan’s Institute for Social Research, who were awarded an R01 from the National Institute on Drug Abuse for their project, “Dynamic Links Between Risk Factors, Substance Use, and Consequences: Ages 18-35." The investigators will use innovative methods developed at The Methodology Center to examine long-term panel data from the University of Michigan’s Monitoring the Future study, which has been gathering data from a large, national sample of adolescents since 1975.

March 8, 2015

Melissa Boone, Ph.D.Unprotected sexual intercourse among HIV-positive men who have sex with men (MSM) puts them at risk for sexually transmitted infections and their partners at risk for HIV. Therefore, it is important to understand factors that lead to sexual risk among HIV-positive MSM. A recent article examined how changes over time in a person’s sense of well-being can influence their sexual risk behavior. The article, “Fluctuations in Depression and Well-Being Are Associated With Sexual Risk Episodes Among HIV-Positive Men,” was authored by Prevention and Methodology Training (PAMT) postdoctoral fellow Melissa Boone and a research group at Columbia University. In it, the authors analyzed intensive longitudinal data collected from 106 sexually active, HIV-positive MSM.

Aaron Wagner and Sara Vasilenko recording podcastFebruary 26, 2015

In this podcast, we discuss the Prevention and Methodology Training (PAMT) program, which is a collaboration between The Methodology Center and The Bennett Pierce Prevention Research Center. Host Aaron Wagner talks with Melissa Boone, Michael Russell, and Sara Vasilenko, all current or former PAMT postdoctoral fellows. The opportunities and unique features of the program are discussed in under 20 minutes. PAMT also trains Penn State graduate students as predoctoral fellows, but that aspect of the program is not discussed in the podcast. For more information about PAMT predoctoral and postdoctoral fellowships, contact Bethany Bray.

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