Info

social, health, political imagery through the lens of George J Huba PhD © 2012-2019

Posts tagged Structural Equation Models

Structural equation models, popularized by Joreskog and Sorbom within their LISREL computer program that solved long-standing mathematical estimation issues, have been recognized by many as the most powerful (or one of few most powerful) statistical model(s) available within the social and health sciences. A combination of concept mapping and mind mapping can quite effectively be used as a direct visual (or theoretical) analog of complex mathematical structural equation models. Such maps can be a good way of communicating the results of the structural equation modeling or in developing the theoretical models that will be tested. And yes, you can test the fit (appropriateness) of the models (diagrams) in a statistically rigorous way.

Yup, you heard here first (although path-like or combined mind map/concept models have been around for at least 45 years and I published hundreds of these in the late 70s though the 1990s in peer-reviewed social science and methodology journals and others simultaneously and subsequently have done the same). I am going to blog a LOT on this in the next few months. Mind and concept maps can be directly and formally simultaneously assessed if there are appropriate data available. Of course, such data are hard to come by, but not as hard as many believe.

The best way to draw concurrent concept and mind maps models is #iMindMap (using the flow chart option along with a mind map for a hybrid model). In structural equation modeling, a mind map would represent the estimation of measurement model parameters while the concurrent concept map would represent the structural model.

Mind Maps + Concept Maps can be statistically and concurrently estimated from appropriate data by Structural Equation Models.

Really.

Needs a lot of data, though. Current Macs and PCs are finally fast enough to do the statistical calculations in a notebook computer.

This is Mind Mapping 3.0 at its very best.

Much more on this topic is coming including a lot of demonstrations that mind maps and concept maps can be easily developed as a consequence of very rigorous mathematical model. And tested for goodness-of-fit.

[aaaahhh what the hell … While I am tempted to add a lot of equations, numerical analysis, and map pictures to this post, I will not do so and not mix up the media and message. This is the pilot. The series is coming this summer.]

The following generic sample illustrates what the hybrid models look like.

Constructs are measured by indicators. Indicators are usually imperfect and can be corrected in the statistical modeling. The relationship between constructs and indicators is shown in the mind map.

The constructs themselves may be related in a causal or noncausal way. The concept map shows the relationships that are present as determined by the statistical modeling.

Click on image to increase size.

Topic (correlations among constructs)

I confess. In 1979 Pete Bentler and I published an article entitled “Simple Minitheories of Love” in the highest prestige journal on personality and social psychology.

Blame it on the exploits of the greatest psychometrician of his generation and a 28 year-old wanna-be psychometrician, both active personality researchers, trying to convince the field that the new statistical modeling methods (Structural Equation Models; LISREL) they were testing would revolutionize the field (I was wrong on that one, too).

Now ask yourself why neither of these guys — nor any of the other main figures in the fields of psychometrics, sociometrics, personality, social psychology, attraction research — ever went on to start a web site to match individuals on the basis of personality and life style questionnaires (I won’t dignify them by calling them tests); such sites became quite lucrative. This was in spite of the fact that at least one (Huba) had the opportunity to do so during the years when he was the Vice President of R&D for a major psychological testing company and later when most of the other competing testing companies hired him as consultant. Or why did the major personality test developer of his generation and the owner of a psychological testing company (the late Doug Jackson) never consider developing such a product?

See a pattern here? Even the folks who made the most $$$ from psychological instruments and had the most influence in the psychological assessment journals and industry did not develop a Love Site.

I concede that a Love Site may be a good place to find people you might not never meet otherwise through your social and work friends and these might be good mates or sex partners. Or they might be psychopaths, perpetuators of sexual or domestic violence, dependent individuals, or alcoholics.

So far as I can tell from the undisclosed algorithms of the dating sites and their unpublished outcomes, I have no way of knowing for sure if the sites have a good chance of producing a good outcome and avoiding a terrible (and life-threatening) one. I suspect that if there were strong scientific evidence that the sites “work” in both cases, there would be a lot of scientific research published that supports this notion. Where is the incontrovertible evidence? Can I can read it or hear it at professional conventions? Claims on TV that a lot of people got married mean little or nothing without information about comparison groups or negative outcomes.

I would have no problem concluding that the Love Sites are effective if there were psychometric and other scientific evidence that the algorithms used are valid. Without such evidence, I worry that they are more voodoo and “smoke and mirrors” than places where you can find a mate and your date will not result in a rape. Of course I cannot prove my position is right, but neither can the Love Sites. My stance is safer for individuals.

There is that old fashioned system of “meet and greet and respect the people you meet” that did produce so many humans that we now have a problem with world-wide population growth. Sometimes older methods work better if you are patient.

Love Sites