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 Collins, L. M., Chakraborty, B., Murphy, S. A., & Strecher, V. J. (2009). Comparison of a phased experimental approach and a single randomized clinical trial for developing multicomponent behavioral interventions. Clinical Trials, 6(1), 5-15.
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Every spring semester, The Methodology Center organizes a series of three one-credit courses in research methodology. Read more...
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September 2009 Featured Article |
 Lanza, S. T., Savage, J. S., & Birch, L. L. (2009). Identification and prediction of latent classes of weight-loss strategies among women. Obesity. Advance online publication. doi:10.1038/oby.2009.275.
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Latent Class and Latent Transition Analysis Book |
 August 2009:
The book Latent Class and Latent Transition Analysis: With Applications in the Social, Behavioral, and Health Sciences, by L. M. Collins and S. T. Lanza, is now available for pre-order from the publisher (Wiley) and other online vendors.
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Summer Institute Improves Research Skills |
July 2, 2009:
by Liam Jackson
If you attend one of the Methodology Center’s Summer Institutes, the probability is very high that you’ll learn something new about statistics. This year, forty researchers from more than twenty universities and research organizations convened at the Penn State Conference Center Hotel, June 29 to July 1, for the 14th Summer Institute on Longitudinal Analysis.
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July 2009:
The 14th Summer Institute on Longitudinal Methods was sponsored by The Pennsylvania State University and the National Institute on Drug Abuse. It provided researchers who have varying levels of methodological training the opportunity to familiarize themselves with longitudinal data analysis. In addition, the Institute was designed to facilitate the exchange of ideas among substantive and methodological researchers.
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Summer 2009 Featured Article |
 Summer 2009:
Schafer, J. L. & Kang, J. (2008). Average causal effects from nonrandomized studies: A practical guide and simulated example. Psychological Methods, 13(4), 279-313.
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Scientist News - Runze Li |
 April 2009:
Runze Li named an Institute of Mathematical Statistics (IMS) Fellow.
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Announcing the 2009 Summer Institute |
March 2009:
The Methodology Center announces its 14th Summer Institute on Longitudinal Methods. This year's three-day Institute features a workshop on latent class and latent transition analysis by experts Linda Collins and Stephanie Lanza.
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Spring 2009 Featured Article |
 Spring 2009:
Coffman, D. L. (2008). Model error in covariance structure models: Some implications for power and Type I error. Methodology, 4(4), 159-167.
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Spring 2009: 