Marcus Crede

This is just the most amazing teaching tool ever!! Thank you Kristoffer.

It was truly the golden age of psychology when you could get away with testing a supposedly hypothesized three-way interaction with N=106. Or maybe that only worked if you were an Ivy League professor. doi.org/10.1016/j.ob...

Our large-scale study of phone bans just came out in Science. We randomized phone-free classrooms for 16,000+ students across 10 institutions in Odisha, India. Students deposited phones in a box at the start of each class, for a full semester.

A million times this. So unbelievably obnoxious to expect 50 faculty members to give up their time just because you could not come up with a more interesting assignment.

Spectacular thunderstorms in Ames during the night with some torrential rain at times. Or was there? Gemini tells me that no rain at all has fallen in Ames over the last 24 hours. Great that AI can get basic stuff like this wrong. I should definitely trust it with important stuff.😒

My 9-year old kid just got a pretty personalized recruitment letter from a university. 😕

How mean would it be to point out to someone that a huge chunk of their (very well known) life's work is a function of a well-known statistical artifact? Asking for a friend.

Over the past two years, I4R partnered with Psychological Science (@psychscience.bsky.social) on a large reproducibility project. 67 independent teams reproduced 64 articles published in 2024–2025, about 44% of eligible papers. Paper: www.econstor.eu/bitstream/10... Here's what we learned 🧵

Best case scenario: AI causes immense social upheaval via mass unemployment. Worst case scenario: AI kills us all. Politicians: Let's talk about trans people in sport. Fuck AI.

Just reviewed another psych paper with complex analysis, open data & R code - and appallingly bad variable measurement. I do wish psych PhD programs would spend more time teaching methods (e.g., measurement, design, sampling) and a little less time teaching arcane statistical tools & coding.

It's never a bad day to repost this one.

Now out at EJSP: We explored cultural & individual differences in the hierarchy of moral concern across student samples from 41 cultural groups (n >6500). doi.org/10.1002/ejsp...

Me too and I normally don't get any applications at all so I cannot imagine how many of these e-mails more influential and popular researchers get.

You can get a lot of media attention for your work if you artificially create four groups out of a continuous variable, use two strongly confounded IVs, and inappropriately use mediators as control variables. bjsm.bmj.com/content/earl...

Londoners say NO to Ray-Ban pervert glasses

Looks increasingly like the last contribution of Anthropic and OpenAI will be to have solved the Fermi Paradox.

My lower back is insisting that I get a tattoo on my forehead that reads "If you see this man at the gym please remind him that he is no longer 22. He tends to forget".

This is interesting. You get assigned to being born at a random place and time in history, to see what a typical person's life might have been like then. Unfortunately I was born in 1403 in the valley of Mexico and died at age 4 from dysentery.

Dan Ariely has apparently been at Duke since 2008. I hope that the Dean of the B-school there gets someone with data forensics chops to do a complete audit of all the data for papers produced during his tenure there.

All those Duke MBA students must be thrilled to know that their >$80k annual tuition is being used to pay the salary of a demonstrated fraud.

Have criminal charges ever been filed against a researcher for stuff like this? It strikes me as horrific fraud on other researchers, the public, the employer, and funding agencies - as well as doing great damage to the public's trust in science. How Ariely still has a job is completely beyond me.

Psych Science has retracted Ariely & Wertenbroch (2002). The second author requested the retraction. Both authors agreed to it. journals.sagepub.com/doi/full/10.... So grateful to @datacolada.bsky.social for these blog posts and the work behind them: datacolada.org/138 and datacolada.org/139 1/2

Data Colada strikes again with incredible data forensics work

The Hugging Face incident apparently involved over 1000 agents collaborating and with some sacrificing themselves to achieve the collective end of cheating and fooling the scorer open.substack.com/pub/plannedo...

Has there ever been a dumber and more brand-destructive ad than the Good Good Callaway ad?

Apparently Tim Curry wanted to go hang out with Dolly. RIP.

What are some examples of *non-fraudulent* major errors in scientific papers that had major consequences, perhaps after taking a long time to be corrected?

The "Minnesota Study of Twins Apart" is the #1 most often cited study by IQ hereditarians and race science supporters in favor of high within-group IQ heritability. In this 2022 peer-reviewed article, I explained why the study's conclusions should be rejected. jayjoseph.net/wp-content/u...

You know you're getting old when there is a >700 point difference between your bullet chess rating and your rapid chess rating.

I am proud of this paper. Since it came out in 2022 it has received 0 citations (yes that's a zero). But multiple young scientists have found it useful! (from other labs, so they were not coerced...). Perhaps you will find it useful too? SOME TIPS FOR WRITING SCIENCE doi.org/10.1523/ENEU...

This is a masterpiece. Simply excellent www.instagram.com/reel/DMVGMIC...

That certainly qualifies as a "significant methodological error". I'd even wager that p<.01.

we have got to put that into a causal inference lecture

I'm excited to announce that I will be reviewing graduate student applications for Fall 2027 admissions! I review applications in both the Personality, Development, and Health and the Clinical Science (Weinberg) programs.

New paper out now 🥳 When psychologists discuss generalisability, they often refer to vague notions of representativeness. We provide an accessible intro to the total survey error framework as a tool to reason about this more rigorously. w @taymalsalti.bsky.social @ruben.the100.ci >

I find this, 1806 letter from Thomas Jefferson to Edward Jenner, so moving 🥺

New: TOP 2025 is published in RIPR. This paper updates the original 2015 framework for journals, funders, institutions, and others for promoting open research. Congrats and thanks to the TOP Advisory Board and leadership from @seangrant.bsky.social and @katiecorker.bsky.social

Without peeking how many articles do you think were published in 2014 by the Journal of Business Ethics?

For the revision for our "Meta-Analysis with JASP, Part I: Classical Approaches" tutorial, I recorder a series of YouTube videos walking through the examples in JASP www.youtube.com/watch?v=mbou... First time doing this. Do you find walkthroughs like this useful? Let me know any suggestions!

Yesterday's temperature topped 105° in Fresno. "Carlos" and team were working in the watermelons. "Our team is paid piece rate. The more boxes we fill the more we make. The person closest to the truck has the hardest job so we switch off. This is exhausting work." #WeFeedYou

Yesterday, the dew point in Ames, Iowa was 86F (30C), and today is not much better. It is hard to overstate just how awful and dangerous this is. I'm a relatively fit guy but after even 5 minutes outside I was feeling dizzy and nauseous. #Climatechange+cornsweat

Please stop referring to yourself as a "quantitative psychologist" if you don't understand what odds ratios are.

"Maya" is harvesting squash in Tucson AZ where temps as she labored hit 95°. "We start work at 5:30am, but even so, the heat gets the best of us. By 11am it's very hot. Drinking water doesn't relieve my dizziness and nausea caused by the heat." That day hit 107°. #WeFeedYou

Once again convinced that 50% of psychology "researchers" decide on the story that they want to tell first and then shoehorn their analysis and literature review to fit this narrative. Another 40% decide on the story after they've run all analyses that their data allows them to.

I p-hacked my early work on prejudice. It never felt like cheating. I now wonder if that's because I believed the cause was good. New essay on why scholar-activism is a dangerous turn for social psychology. If justice comes first, truth is what gets sacrificed. open.substack.com/pub/michaeli...

Does the (live) shingles vaccine protect against dementia? Fergus Hamilton and colleagues provide important evidence in a new preprint using hospital data from the whole of England in a regression discontinuity design from which we *don't* show evidence of a meaningful protective effect /cont

Comparing registrations to published papers is essential to research integrity - and almost no one does it routinely because it's slow, messy, and time-demanding. RegCheck was built to help make this process easier. Today, we launch RegCheck V2. 🧵 regcheck.app

We need to change norms around sexual harassment Yesterday Tessa West spoke up about a sexual harassment complaint she filed against John Jost. Not only is he a senior colleague in the dept of psychology, but he is one of the most prominant figures in the field of social and political psychology.