Psychometrics: Machine Learning meets Psychology

Psychometric and item response theory methods have long been used to estimate scores or latent traits.  Although traditionally used for testing, these methods are applicable to other problems to reduce dimensionality or provide aggregate measures.  This presentation briefly introduces models from item response theory and psychometrics, motivated by two real research applications.  First creating a composite from biological markers, and a second assessing individuals’ levels of perceived control and risk from cancer.  Measurement models are presented first as latent variable (factor) models and second as mixed models.  Demonstrations show classical methods using maximum likelihood estimation as well as Bayesian methods for both mixed models and latent variable models.

Joshua Wiley has been working as a statistical consultant for the past two years, and is currently a senior analyst at Elkhart Group Ltd.  He is also completing a doctorate degree in health psychology where he studies how individual differences and mechanisms linking psychological and physiological systems.  Particularly how modern analytics can integrate different levels of analysis from the micro biological level to more macro psychological and social ones.

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  • Dante D.

    Below is the GoToMeeting invite we set up for the event:

    Dial +1 (213)[masked]
    Access Code:[masked]https://www3.gotomeeting.com/join/358757734

    We can record the event and and post the link here after the meeting.

    4 · June 11, 2013

    • Jeff W.

      I video taped it and will upload it sometime next week.

      1 · June 14, 2013

  • Scott P.

    Nice easy to follow examples. I should have taken the metro to the venue b/c it would have been easier than parking, but there are several public parking areas within 2 blocks.

    June 14, 2013

  • Toren A.

    Won't be able to make it tonight after all. Hope there is a meeting next month.

    June 13, 2013

  • Farid H.

    Having a hard time with the go to meeting .

    June 13, 2013

  • RN

    Yes, as Tim T. pointed out, there is a subway station (Red Line) station nearby and I will be taking it to avoid the rush hour traffic. btw Downtown has gone from scary ghost town at night in years past to a hip happenin' kind of place with lots of new lofts and restaurants and chic bars and clubs, so you can check it out after the meeting.

    June 12, 2013

    • Jeremy M.

      Expo, purple and blue lines go there too (I think). I'm going to subway it from Expo/Crenshaw, which has a parking lot with a security guard. You could also go from one of the other stations (like Culver city, La Brea, or La Cienega, which also have parking lots).

      2 · June 13, 2013

  • Drake P.

    Sorry to miss this month's meetup, thanks to all from Lionsolver.

    June 12, 2013

  • wes b.

    Will there be any refreshments ?

    June 12, 2013

  • Carlos M.

    Is there any way we can set up a teleconference or recording of this?

    June 10, 2013

    • Rob Z.

      I would prefer video. You film well, and conference software always fails.

      1 · June 11, 2013

    • Jeff W.

      will do.

      2 · June 11, 2013

  • Tim Triche, J.

    There's a metro station a block away, for those of youse who were aware that Los Angeles has a subway system :-P

    June 10, 2013

  • Daniel G.

    Arrgh! Downtown at rush hour? Will be sorry to miss this meeting, but I will look forward to the next one.

    1 · June 10, 2013

  • Dante D.

    Hey folks, there are a number of parking garages in the area. The closest/easiest one is south of 7th street on Grand ave (725 South Grand Avenue) and they usually charge a flat fee of $5. After parking, walk up (approx 20 yards) to 7th street and you should see the 617 building across the street. In the foyer tell security you are attending the event and they should get you up to the 9th floor. The event room is at the end of the hall. See you there!

    June 10, 2013

  • RN

    Well, this is a very convenient location for me. And as a PhD psychologist (emphasis on quantitative methods) I am really excited about this topic.

    June 10, 2013

  • Mathaeus D.

    can't make it

    June 9, 2013

  • Dante D.

    I might have a location in Koreatown. Contact me to discuss. This is a topic that is right up my alley :-)

    June 7, 2013

  • Jeremy M.

    Who's the speaker(s)?

    May 28, 2013

  • A former member
    A former member

    East side please please if possible :)

    May 28, 2013

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