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Idiographic Approaches in Psychology: Hold your horses

October 28, 2024 Julia Rohrer

There have been persistent calls spurring psychologists to do more “idiographic” research, starting even before Peter Molenaar’s “Manifesto on Psychology…

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Posted in: Causal inference, Statistics
"Figur 4. Vorwärts- und Rückwärts-Beugen"

Let’s do statistics the other way around

August 27, 2024 Julia Rohrer 3 Comments

Summer in Berlin – the perfect time and place to explore the city, take a walk in the Görli, go…

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Posted in: Causal inference, Statistics, Teaching

Sometimes a causal effect is just a causal effect (regardless of how it’s mediated or moderated)

June 26, 2024 Julia Rohrer 1 Comment

TL;DR: Tell your students about the potential outcomes framework. It will have (heterogeneous) causal effects on their understanding of causality…

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Posted in: Causal inference, Statistics, Teaching

Is [insert statistical approach] good or bad? Let’s settle the debate, once and for all

April 13, 2024 Julia Rohrer

I don’t like getting into fights and sometimes I am concerned this keeps me from becoming a proper methods/stats person.…

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Posted in: Uncategorized
A treemap of how widely reused psychological measures are.

Oooh baby, rescue me from the jingle jangle jungle

March 22, 2024 Ruben Arslan

Recently, Malte, Taym, Ian and I wrote a short commentary paper on the toothbrush problem for measures in psychology: Everybody…

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Posted in: Error culture, Measurement, Metrics

A casual but causal take on measurement invariance

January 10, 2024 Julia Rohrer

Testing for measurement invariance is one of those things where researchers roughly fall into two categories. Either they consider it…

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Posted in: Statistics
Mr Brightside: It started out with a BIS, how did it end up like this?

Disentangling the Dark and Bright Side of Constructs with a Bright and Dark Side

June 13, 2023 Julia Rohrer 3 Comments

This blog post resulted from a draft that was supposed to become a proper article at some point. Michael Dufner…

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Posted in: Statistics

Non-representative samples! What could possibly go wrong?

March 7, 2023 Julia Rohrer

Earlier this year I saw that a study was making the rounds on Twitter under the catchphrase “Representative samples may…

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Posted in: Statistics

Causal Inference | Hypothesis Testing | All at Once

November 18, 2022 Julia Rohrer 2 Comments

Content warning: half-assed philosophy of science Part I: Causal Inference I am not very keen to join the stats wars,…

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Posted in: Statistics
Figure with text in boxes, Step 1: Estimate Model, Step 2: Marginal Effects!, Step 3: Profit

✨ Unleash your inner stats sparkle ✨ with this very non-technical introduction to marginal effects

May 27, 2022 Julia Rohrer

Update August 2025: There’s now a manuscript by Vincent Arel-Bundock and me providing a more thorough introduction to marginaleffects, Models…

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Posted in: Statistics

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