Psychological Methods, Research & Statistics
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Geoffrey Marczyk, JD, PhD, is Assistant Professor at Widener University's Institute for Graduate Clinical Psychology in Chester, Pennsylvania.
David DeMatteo, JD, PhD, is a behavioral scientist at the Treatment Research Institute at the University of Pennsylvania in Philadelphia, Pennsylvania.
David Festinger, PhD, is a behavioral scientist at the Treatment Resarch Institute at the University of Pennsylvania in Philadelphia, Pennsylvania.
Related Titles
Psychological Methods, Research & Statistics
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