Measurement, Reliability, & Scoring

S3E15: Heywood You Help Me With Negative Residual Variances?

Uncategorized / 2 minutes of reading

In today’s episode Greg & Patrick discuss the causes, consequences, and potential solutions associated with negative residual variances in factor analyses, a condition commonly called a Heywood case. Along the we way they also discuss vegetarian pepperoni, Jaws Part 2, coffin seat belts, balancing a ship, bad puns, sterilizing needles, dead canaries, hitchhikers, legal depositions, […]

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S3E12: The History of Measurement: A Conversation with Derek Briggs

Uncategorized / 1 minute of reading

Patrick and Greg have an in-depth conversation with Derek Briggs, from the University of Colorado, about his new book exploring the fascinating and at times uncomfortable history of measurement and the people who helped develop methods we still use today. Along the way they also mention: outsourcing parenting, where do babies come from, hearing colors,

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S3E11: The Cons and the Cons of Median Splits

Uncategorized / 1 minute of reading

Greg and Patrick talk about median splits and other ways that continuous variables might be categorized to simplify analyses, and the often very high cost of doing so. Along the way they also mention Never Have I Ever, hand cuffs, gold hoop earrings, bungee jumping, Erik, Henry and Penny, having a mini, chug jugs, Hill

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S3E06: Item Parcels: What Could Possibly Go Wrong?!

Uncategorized / 1 minute of reading

In today’s episode Patrick & Greg talk about the use of item parcels in latent variable modeling: what they are, what might motivate you to use them, and what unexpected complications can arise. Along the way they also mention wheel extenders, walking toward the light, logorrhea, party bands, corpse sniffing dogs, boxes of human heads,

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S3E03: Principal Components Analysis is your PAL

Uncategorized / 1 minute of reading

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,

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S2E33: Truth, Balderdash, and Construct Validity

Uncategorized / 1 minute of reading

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.

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S2E27: (re)Connecting With Discrete Data

Uncategorized / 2 minutes of reading

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

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S2E24: The Equivalent Models Problem

Uncategorized / 1 minute of reading

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

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S2E21: Yes, Virginia… There ARE Latent Variables

Uncategorized / 1 minute of reading

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.

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S1E22: Factor Analysis — The Good, The Bad, & The Ugly

Uncategorized / 1 minute of reading

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

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