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  • UC Davis Psychology Quantitative Program

    Quantitative Brown Bag Series

    Location:  Young Hall 166 (Unless specified otherwise)
    Thursdays from 1:35 PM - 2:35 PM (Unless specified otherwise)
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    ACADEMIC YEAR:      2014 - 2015 Print Page
    Fall 2014
    10/02/2014
    Bayesian versus Frequentist Estimation of Multitrat-Multimethod Confirmatory Factor Models 
    SPEAKER: Dr. Jonathan Helm

    Campbell and Fiske's (1959) separation of trait, method, and unique variance across a set of multitrait-multimethod (MTMM) manifest variables directly translates to a confirmatory factor model, and several reports support this approach for partitioning variance (Cole, 1987; Widaman, 1985; Schmitt & Stults, 1986). However, researchers selecting this approach often encounter estimation problems (i.e., failed convergence or solutions with out-of-bounds estimates; Widaman, 1985). Mathematical investigations have identified several potential sources of these problems (Kenny & Kashy, 1992; Grayson & Marsh, 1994), forcing applied researchers to face an analytic conundrum when performing MTMM data analysis. The advent of Bayesian estimation for structural models offers many new opportunities, including the ability to fit models that would fail to converge when estimated within a frequentist framework (Scheines, Hoijtink, & Boomsma, 1999; Asparouhov & Muthén, 2010). Based on the non-identification problems that typically arise when fitting the CTCM model to MTMM data (Kenny & Kashy, 1992; Grayson & Marsh, 1994), and extra modeling flexibility provided by Bayesian estimation, the current paper examines the differences between maximum-likelihood (ML) and Bayesian estimation of the CTCM model. *Prior to Dr. Helm's presentation Dr. Emilio Ferrer will be introducing our area's new graduate students. He'll also be giving updates on the area search for a new faculty member, with emphasis on opportunities for us to attend prospective candidates' job talks later this quarter and/or early winter. The meeting will conclude with asking for volunteers to present at fall brown bag meetings.
    10/09/2014
    TBA 

    10/16/2014
    TBA 

    10/23/2014
    TBA 

    10/30/2014
    TBA 
    SPEAKER: Tentative: Dr. Dean K. Simonton
    11/06/2014
    TBA 

    11/13/2014
    TBA 

    11/20/2014
    TBA 

    11/27/2014
    Thanksgiving Holiday 
    Agenda
    No brown bag this week. Happy Thanksgiving and safe travels.
    12/04/2014
    TBA 
    SPEAKER: Melissa McTernan
    12/11/2014
    TBA 
    SPEAKER: Marilu Isiordia

    TBA
    12/18/2014
    Finals Week 
    Agenda
    No brown bag this week. Good luck with finals, whether taking or grading them.