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Reviewer notes: In a randomized experiment, the pre-post differences are not effect estimates

January 22, 2025 Julia Rohrer 4 Comments

Reviewer notes are a new short format with brief explanations of basic ideas that might come in handy during (for…

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Posted in: Causal inference, Reviewer notes, Statistics, Teaching

The Untold Mystery of Rogue RA

December 18, 2024 Malte Elson 2 Comments

The 100% CI unravels serial cases of mysterious research misconduct by a single villain: Rogue RA

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Posted in: Shitposting
Funny Bunny/Lotti Karotti

The Hare-Brained Generation: Teen mental health crisis or lacklustre record keeping?

December 10, 2024 Ruben Arslan Leave a comment

In The Anxious Generation, Jon Haidt argues that social media is driving a mental health crisis among teens. It’s a…

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Posted in: Causal inference, Error culture, Measurement Filed under: error culture, mistakes, peer review, social media
Sampling distribution of the mean with an observed mean and the resulting confidence interval indicated by a shruggie emoji

Why you are not allowed to say that your 95% confidence interval contains the true parameter with a probability of 95%

December 5, 2024 Julia Rohrer 7 Comments

A shibboleth is a custom, such as a choice of phrasing, that distinguishes one group of people from another. The…

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Posted in: Statistics, Teaching
A screenshot of the first page of "Writing the Empirical Journal Article" by Daryl J. Bem, whose name has been crossed out and cruedly replaced by "Julia Rohrer"

Writing about technical topics in an accessible manner

December 1, 2024 Julia Rohrer 5 Comments

A wise man – I’m quite sure it was Brian Wansink – once pointed out that it is impossible to…

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Posted in: Teaching, Writing

Idiographic Approaches in Psychology: Hold your horses

October 28, 2024 Julia Rohrer Leave a comment

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 2 Comments

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 Leave a comment

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 Leave a comment

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

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