Greg and Patrick discuss Principal Components Analysis: what it is, what it absolutely isn’t, and what kind of cool things it can do in its own right. Along the way, they discuss Twinkle Twinkle Little Star, the division symbol, Spider Pig, croissants & skewers, doing a nickel in the big house, jumping the starter solenoid, […]
S3E03: Principal Components Analysis is your PAL Read More »
In this episode Patrick and Greg construct a deconstruction of the construct of construct validity. Constructively. Along the way they also discuss Jacques, sheep STDs, Bill Clinton, college admissions, touching a giant turtle, butwinking, cadaver bingo, nomological networks, teen spirit, playing drop-the-hanky, ticket to the prom, and lipstick on a pig.
S2E33: Truth, Balderdash, and Construct Validity Read More »
In this episode Patrick and Greg discuss the challenges of having ordered categorical data, as well as the seemingly magical limited information and full information analytical options to deal with such data. Along the way they also discuss sky cranes, the Mars Climate Orbiter, metric vs. imperial units of measurement, Lockheed-Martin, left hands and right
S2E27: (re)Connecting With Discrete Data Read More »
In this episode Greg and Patrick explore the freakish and terrifying topic of equivalent models, particularly as they arise within the structural equation modeling analytical framework. Along the way they also discuss rinsing toes, palindromes, anagrams, being a tad unquiet, under-teaching, double-secret probation, scary cousins, sausage makers, Tribbles, empty beer bottles, Hard Core History, a
S2E24: The Equivalent Models Problem Read More »
In this episode Patrick and Greg talk about latent variables: what they are, why we care, and under what circumstances we can analyze them directly. Along the way they also discuss: BWI, dadgic, Patrick’s bromance, the economy, Chris Botti, inter-planetary probes, Gronk, 118 degree dry heat, the evil eye, and Dora the Explorer.
S2E21: Yes, Virginia… There ARE Latent Variables Read More »
Greg and Patrick are inspired by possibly the greatest Western movie ever filmed as they navigate The Good, The Bad, and The Ugly of factor analysis. In addition to arguing that exploratory factor analysis isn’t really exploratory and confirmatory factor analysis isn’t really confirmatory, they adroitly traverse topics including sabbatical do-overs, Corona Academy, leeches, tall
S1E22: Factor Analysis — The Good, The Bad, & The Ugly Read More »
Greg and Patrick pursue several topics raised on prior episodes on scale reliability and measurement invariance to their logical conclusion. Namely, they ponder the multitude of persnickety issues associated with putting a set of items into the psychometric sausage maker to grind out scale scores for use in subsequent analysis. In addition to bickering with
S1E13: How Do I Get Scale Scores? Weight, Weight… Don’t Tell Me… Read More »
In this episode, Patrick and Greg respond to a call-in question that raises a host of issues revolving around measurement invariance testing. In addition to complaining about horrible terminology commonly used in quantitative methodology, they also address pirate mothers, irreverance, time machines, quadruple negatives, buying firewood, digging up bodies, the Schotz clock, and dumpster fires.
S1E12: Measurement (Non)Invariance — Can We Ever Fail to Not Incorrectly Reject It? Read More »
In this first episode of 2020, Greg and Patrick welcome the new year by offering what listeners have come to expect: no apparent plan for the episode, followed by rambling, circular, and barely internally-consistent discussion. At least they are, well, reliable. In fact, their meanderings lead them to a discussion of just that topic —
S1E09: Grumpy Old Man & Village Idiot Argue About Reliability Read More »
