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 […]
S3E11: The Cons and the Cons of Median Splits Read More »
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
S3E10: Observation and Exploration Read More »
Patrick and Greg answer a mailbag question about some foundational principles of regression and correlation, specifically the differences among correlation, standardized regression weights, semi-partial correlations, and partial correlations. They also check in with someone from Season 2: Amanda Montoya’s undergrad mentee, Kat. Along the way, they also mention: Ap Olo Gies, mocking by text, particle
S3E09: Semi-Partially Clarifying Measures of Association in Regression Read More »
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,
S3E08: Statistical Degrees of Freedom…An Intimate Stranger Read More »
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
S3E07: In Defense of Researcher Degrees of Freedom Read More »
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,
S3E06: Item Parcels: What Could Possibly Go Wrong?! Read More »
What starts as a friendly check-in with our intern Ethan McCormick in the Netherlands turns into Ethan’s Pop Quiz Revenge around the themes of statistical paradoxes and distributions. Along the way, Greg and Patrick also discuss headlamps, airport carousels, prostrate vs. prostate, operatic ambulances, ungulates, how X-mas got its X, Cobra Kai, bromeo, metric time,
S3E05: Pop Quiz 3: Ethan’s Revenge Read More »
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
S3E04: Two Time Point Data: What Is Your Quest? Read More »
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 leads Greg and the rest of us through the incredibly cool and powerful topic of regions of significance, a way to help unpack under what moderating conditions treatments and variable relations are statistically significant. Along the way, they also mention: parallelism, Olivia Newton-John, going to the wrong church, laws in Vermont,
S3E02: Johnson-Neyman Regions of Significance Read More »
