Playlist: Study Design & Validity

S3E10: Observation and Exploration

Patrick and Greg discuss the often forgotten importance of observation and exploration for the purpose of suggesting patterns and forming hypotheses, which can later be refined and rigorously tested within the framework of our well-developed confirmatory machinery. Along the they way they also discuss Orlando road trips, our inner child, crappy glue, melted chocolate, leaning …

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S3E08: Statistical Degrees of Freedom…An Intimate Stranger

In today’s episode Patrick and Greg talk about statistical degrees of freedom: what they represent, how they are computed, and the importance they play in daily life. Along the way they also mention color blindness, the Skinnylicious menu, Kevin Bacon, Elmo’s Diner, the flatties, Amtrak, drinking Guinness at room temperature, sudoku, courage, paying the reaper, …

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S3E07: In Defense of Researcher Degrees of Freedom

In this episode, Greg and Patrick discuss the many places where researchers make decisions throughout the research process, and they weigh the pros and cons of those researchers having such decision-making freedom. Along the way, they also mention Lucky Charms, frozen waffles for dinner, the fifth down, forking paths, Dirty Deeds Done Dirt Cheap, sharks …

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S3E04: Two Time Point Data: What Is Your Quest?

Patrick and Greg talk about the potential advantages and disadvantages of alternative approaches to analyzing two time-point data. They discuss traditional models for raw and residualized change scores, and describe how each of these remains baked into the soul of contemporary models for repeated measures data.  Along the way they also mention: 24 inch pizza …

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S2E33: Truth, Balderdash, and Construct Validity

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. 

S2E24: The Equivalent Models Problem

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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S2E14: Control (Variable) Issues

Greg and Patrick discuss issues of controlling for extraneous variables, by randomization and by design, but especially the challenges and assumptions associated with statistical control. Along the way they also mention drag racing, Volkswagen Bugs, Seabiscuit, Harrison Bergeron, Diet Coke, Janet Jackson, John Denver, gastrointestinal distress, Sewall Wright, and babies and bathwater. 

S2E05: Model Based Thinking

In this episode Greg and Patrick wander semi-drunkenly around the topic of model-based inference and discuss how this perspective can help move us forward as a scientific discipline. They also somehow manage to discuss explosives, sniffing glue, homemade 787s, catfish noodling, the Ikea helpline, Calvinball, Ludwig Beethoven, Rube Goldberg, hell’s half acre, denouements, and intolerable …

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S2E02: The Auto-Regressive Cross-Lagged Horror Picture Show

Patrick and Greg open with a disagreement about time travel movies, which then somehow devolves into a discussion of alternative approaches to modeling longitudinal data. They agree that a core issue to consider is the separation of within-person and between-person components of change over time, both theoretically and analytically. Throughout the discussion they also mention …

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