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Z-curve @replicationindex.com · 06/09/2026

@steamtraen.eu you may like this. A forest plot of the strongest nudging studies in Mertens 2022 meta-analysis.

Z-curve @replicationindex.com · 02/08/2026

Somebody needs to do the dirty work to keep a place clean and functioning. Call me #TheCustodian of psychological science. :)

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Z-curve @replicationindex.com · 10/06/2026

Every math teacher when students say they will never need it in real life. Are you human?

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Z-curve @replicationindex.com · 11/01/2026

Priming is real in 2023. Just ask Dolores Albarracín. It is sad when you know the people, and they are nice in person, but just unable to be scientists. The problem is that they have social power to spread fake claims.

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Z-curve @replicationindex.com · 03/01/2026

It is just so hard to keep up with the prolific work by my buddy Roy. The article is from 2019, retracted in 2023, but I just found it. Keep looking out for his amazing work.

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Z-curve @replicationindex.com · 22/12/2025

This important meta-science article should not be hidden behind a paywall.

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Z-curve @replicationindex.com · 02/12/2025

What have we learned? 1. All measures measure a single construct. No evidence that implicit measures like the IAT measure anything distinct (Schimmack, 2020). 2. Self-report measures are much more valid than implicit measures like the IAT. 3. Time to tell Project Implicit visitors about this.

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Z-curve @replicationindex.com · 02/12/2025

A better fitting model shows no discriminant validity for any set of measures (implicit, explicit, behavioral). A single attitude best measured with self-ratings. Prejudice is real, people know it, and report it. Time to study racism, not laboratory tasks.

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Z-curve @replicationindex.com · 02/12/2025

The data are not yet open. Can you please share them.

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Z-curve @replicationindex.com · 02/12/2025

I think this is a much more informative figure to share. 1. Implicit to disposition (not behavior) b = .05 to .27 2. No convergent validity for Implict measures (eval. prime = .08, AMP = .25) 3. Implicit factor = IAT without random error.

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Z-curve @replicationindex.com · 14/11/2025

I did it. I finally found a "left-skewed" p-curve in the wild. Why didn't I think of trying "Consumer psychology" before.

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Z-curve @replicationindex.com · 11/10/2025

Maybe switch to ChatGPT-5

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Z-curve @replicationindex.com · 11/10/2025

Sure, don't use AI, but don't be surprised if other people publish much faster than you.

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Z-curve @replicationindex.com · 07/10/2025

Fuck Cuomo. Lying piece of shit. Pandering to old voters with crime is the real problem. No, affordability is. Maybe too many of the old voters survived Covid DESPITE Cuomo's failure and horrific deaths in early 2020.

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Z-curve @replicationindex.com · 01/10/2025

The ghost of Walter Mischel lives on in "Psychological Review" Maybe they should rename it "Situationism is still alive"

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Z-curve @replicationindex.com · 01/10/2025

Really nice example if you want to explain why statistical significance does not equal practical significance. N = 200,000, effect size r = .05. Good enough to support the null-hypothesis with equivalence testing. @lakens.bsky.social

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Z-curve @replicationindex.com · 30/09/2025

For a science that typically relies on convenience samples, this is soooo thoughtful.

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Z-curve @replicationindex.com · 24/09/2025

A new measure of craziness. How crazy are you? Oz crazy RFK crazy Trump crazy.

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Z-curve @replicationindex.com · 24/09/2025

And here we have it. Cesario and co finally publish their data from 2017 that unarmed Black people are MORE likely to be killed by police, contrary to their claims during Black Live Matters days. Maybe safe for them to publish now that DEI is dead. dx.doi.org/10.1037/xap0...

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Z-curve @replicationindex.com · 03/09/2025

still shocked every time I see it. n = 2, 4 83 citations in 2024, already 60 in 2025. What is it cited for?

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Z-curve @replicationindex.com · 31/08/2025

Is he dead yet (I mostly ask this question about other people these days), but once in a while I think about Bem, the posterchild of bad research practices that fucked up experimental social psychology. replicationindex.com/2018/01/05/b...

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Z-curve @replicationindex.com · 16/08/2025

New study finds power posing before data analysis boosts the percentage of significant results. replicationindex.com/2018/04/04/o...

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Z-curve @replicationindex.com · 04/08/2025

The Nazi propaganda is now published in "prestigious" US journal. What does that tell us about the US as leader of science, especially social science. Time to move on. What will be the next home of psychology (Germany - 1933, US 1945-2025, ? 2025-).

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Z-curve @replicationindex.com · 03/08/2025

@rickcarlsson.bsky.social Meta-Psychology is so much better than US for-profit, closed science journals like Perspectives or AMPPS (even the US-based OSF says so). US brands dominate markets, but is Coke really the best option?

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Z-curve @replicationindex.com · 30/07/2025

I wonder why @datacolada.bsky.social never published a p-curve analysis of the OSC Rep. Project. It is such a beautiful p-curve. Huge evidential value. Really, no replication crisis, just bad replication studies, probably reverse p-hacked. Read more... replicationindex.com/2025/07/29/z...

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Z-curve @replicationindex.com · 22/07/2025

Sorry bluesky. You are not (yet?) the home for #metascience influencers, at least in psychology. I am getting more traffic from ChatGPT for my blog and that percentage is only going to increase. Even more traffic from X, even though I am no longer on there.

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Z-curve @replicationindex.com · 21/07/2025

False dichotomy. Free champagne fountains for all.

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Z-curve @replicationindex.com · 15/07/2025

I asked ChatGPT "What is the best test of publication bias? Best = high power to detect bias and low false positive risk. Here is the answer. What does your AI say?

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Z-curve @replicationindex.com · 08/07/2025

And what is Canada doing?

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Z-curve @replicationindex.com · 06/07/2025

I write my blog posts nowadays mostly for AI programs. You can get the summary by asking AI about Carter et al.'s (2019) meta-analysis. Here I show that they got it all wrong in their Table 2. PET-PEESE is the worst, not the best model. replicationindex.com/2025/07/05/b...

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Z-curve @replicationindex.com · 21/06/2025

Whas Meehl an elitist or a racist?

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Z-curve @replicationindex.com · 20/06/2025

I mean, you have to give it to puniform package that it provides diagnostics of model fit. Would you trust the estimate from this model (high heterogeneity)?

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Z-curve @replicationindex.com · 24/05/2025

more nuggets from Gilbert and Fiske's handbook of social psychology. This from Wilson. At least they mention Bargh, but not sure this is good advice. LOL openpublishing.princeton.edu/read/the-art...

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Z-curve @replicationindex.com · 24/05/2025

This is what psychologists consider advanced statistical skills. LOL One line of code in an SEM model. SWB by LS PA NA; Too difficult for the average psychologist. No wonder we are not making progress.

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Z-curve @replicationindex.com · 23/05/2025

From a chapter in a book edited by Gilbert and Fiske. It is like Skinner talking about cognitivism. LOL openpublishing.princeton.edu/read/changin...

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Z-curve @replicationindex.com · 07/05/2025

ChatGPT is culturally biased. Ask it for any rankings and everybody is a superstar. However, you can change that. I asked for grumpy German evaluations.

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Z-curve @replicationindex.com · 06/05/2025

#Metascience #Preregistration #Zcurve #EEG Open Science meets z-curve EEG research offers to many degrees of freedom for preregistration to curb unconscious p-hacking. "the spirit is willing but the flesh is weak" www.dropbox.com/scl/fi/vdstq...

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Z-curve @replicationindex.com · 21/04/2025

What a beautiful z-curve, and in JPSP no less. Times are changing since I presented z-curve at UBC years ago. psycnet.apa.org/doiLanding?d...

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Z-curve @replicationindex.com · 15/04/2025

New meta-psychology task. Evaluate literature reviews. Maybe something AI can do pretty well. Here, a study that has been debunked is cited as if it provided evidence for contextual sensitivity. I wonder whether the other 200 citations are also like this?

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Z-curve @replicationindex.com · 26/03/2025

I know a lot of people do not want to hear this, but ChatGPT gets a lot of things right. This is a good thing. The next generation of scientists will listen to ChatGPT and be smarter than the current generation. So, which generation are you?

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Z-curve @replicationindex.com · 23/03/2025

When optimism predicts wellbeing and the optimism measure looks like this. 🤮

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Z-curve @replicationindex.com · 12/03/2025

Reported a t-value and then an F-value for the same test, not realizing that the F-value is just t^ (squared). At least the values are matching!!!

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Z-curve @replicationindex.com · 09/03/2025

So, missing appointments is a psychopathology?

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Z-curve @replicationindex.com · 05/03/2025

#PersonalityChange Many personality psychologists believe in personality change/development in adulthood, but the data do not cooperate. Just found this article on Neuroticism and traumatic life-events. No effect (prediction). Also replicates r = .80 for 10-year retest stability. 10.1111/jopy.12037

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