Jake McMullen's Avatar

Jake McMullen

@jakmull

Academic at the University of Turku, Finland. Math ed, ed psych, methods.

635
Followers
187
Following
15
Posts
03.08.2023
Joined
Posts Following

Latest posts by Jake McMullen @jakmull

I'm convinced AI is our generation's radium - a discovery with genuinely useful applications in specific, controlled circumstances that we stupidly put in everything from kid's toys to toothpaste until we realised the harm far too late where future generations will ask if we were out of our minds.

08.02.2026 22:23 πŸ‘ 17926 πŸ” 5442 πŸ’¬ 245 πŸ“Œ 258

i have just gotten off a productive call with sauron where i laid out our requests

- nazgul bodycams
- morgul knife must remain sheathed unless suspect is determined to be carrying the one ring
- shelob will be the new point of contact

27.01.2026 15:15 πŸ‘ 10243 πŸ” 2945 πŸ’¬ 110 πŸ“Œ 72
Preview
RegCheck RegCheck is an AI tool to compare preregistrations with papers instantly.

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

22.01.2026 11:05 πŸ‘ 174 πŸ” 90 πŸ’¬ 8 πŸ“Œ 6

It's also very handy with a 12 year old boy at home

01.01.2026 20:12 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

In Swedish, there's killgissning, which roughly translates to 'dude guessing'

01.01.2026 20:06 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Models as Prediction Machines: How to Convert Confusing Coefficients into Clear Quantities

Abstract
Psychological researchers usually make sense of regression models by interpreting coefficient estimates directly. This works well enough for simple linear models, but is more challenging for more complex models with, for example, categorical variables, interactions, non-linearities, and hierarchical structures. Here, we introduce an alternative approach to making sense of statistical models. The central idea is to abstract away from the mechanics of estimation, and to treat models as β€œcounterfactual prediction machines,” which are subsequently queried to estimate quantities and conduct tests that matter substantively. This workflow is model-agnostic; it can be applied in a consistent fashion to draw causal or descriptive inference from a wide range of models. We illustrate how to implement this workflow with the marginaleffects package, which supports over 100 different classes of models in R and Python, and present two worked examples. These examples show how the workflow can be applied across designs (e.g., observational study, randomized experiment) to answer different research questions (e.g., associations, causal effects, effect heterogeneity) while facing various challenges (e.g., controlling for confounders in a flexible manner, modelling ordinal outcomes, and interpreting non-linear models).

Models as Prediction Machines: How to Convert Confusing Coefficients into Clear Quantities Abstract Psychological researchers usually make sense of regression models by interpreting coefficient estimates directly. This works well enough for simple linear models, but is more challenging for more complex models with, for example, categorical variables, interactions, non-linearities, and hierarchical structures. Here, we introduce an alternative approach to making sense of statistical models. The central idea is to abstract away from the mechanics of estimation, and to treat models as β€œcounterfactual prediction machines,” which are subsequently queried to estimate quantities and conduct tests that matter substantively. This workflow is model-agnostic; it can be applied in a consistent fashion to draw causal or descriptive inference from a wide range of models. We illustrate how to implement this workflow with the marginaleffects package, which supports over 100 different classes of models in R and Python, and present two worked examples. These examples show how the workflow can be applied across designs (e.g., observational study, randomized experiment) to answer different research questions (e.g., associations, causal effects, effect heterogeneity) while facing various challenges (e.g., controlling for confounders in a flexible manner, modelling ordinal outcomes, and interpreting non-linear models).

Figure illustrating model predictions. On the X-axis the predictor, annual gross income in Euro. On the Y-axis the outcome, predicted life satisfaction. A solid line marks the curve of predictions on which individual data points are marked as model-implied outcomes at incomes of interest. Comparing two such predictions gives us a comparison. We can also fit a tangent to the line of predictions, which illustrates the slope at any given point of the curve.

Figure illustrating model predictions. On the X-axis the predictor, annual gross income in Euro. On the Y-axis the outcome, predicted life satisfaction. A solid line marks the curve of predictions on which individual data points are marked as model-implied outcomes at incomes of interest. Comparing two such predictions gives us a comparison. We can also fit a tangent to the line of predictions, which illustrates the slope at any given point of the curve.

A figure illustrating various ways to include age as a predictor in a model. On the x-axis age (predictor), on the y-axis the outcome (model-implied importance of friends, including confidence intervals).

Illustrated are 
1. age as a categorical predictor, resultings in the predictions bouncing around a lot with wide confidence intervals
2. age as a linear predictor, which forces a straight line through the data points that has a very tight confidence band and
3. age splines, which lies somewhere in between as it smoothly follows the data but has more uncertainty than the straight line.

A figure illustrating various ways to include age as a predictor in a model. On the x-axis age (predictor), on the y-axis the outcome (model-implied importance of friends, including confidence intervals). Illustrated are 1. age as a categorical predictor, resultings in the predictions bouncing around a lot with wide confidence intervals 2. age as a linear predictor, which forces a straight line through the data points that has a very tight confidence band and 3. age splines, which lies somewhere in between as it smoothly follows the data but has more uncertainty than the straight line.

Ever stared at a table of regression coefficients & wondered what you're doing with your life?

Very excited to share this gentle introduction to another way of making sense of statistical models (w @vincentab.bsky.social)
Preprint: doi.org/10.31234/osf...
Website: j-rohrer.github.io/marginal-psy...

25.08.2025 11:49 πŸ‘ 1007 πŸ” 288 πŸ’¬ 47 πŸ“Œ 22

I mean, beside the environmental, ethical, and intellectual issues, obvs

07.11.2025 08:58 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Of all of the ills brought on by genAI, the co-opting of the em-dash may be one of the worst

07.11.2025 08:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
Statistical evidence in psychological networks - Nature Human Behaviour Psychometric network models have become increasingly popular in psychology and the social sciences. Huth et al. show that a large proportion of reported network findings are based on weak or inconclusive evidence inviting caution when interpreting results.

A new take on the limitations of "psychometric networks" now out in Nature Human Behavior. You don't want to put too much confidence in individual edges. Something we cautioned against in 2017.

1/2

www.nature.com/articles/s41...

12.10.2025 11:08 πŸ‘ 68 πŸ” 21 πŸ’¬ 4 πŸ“Œ 0
Slide: There are no shortcuts--'ugly social realities' 
Fear of being left out a fabricated & marketing public relations rhetoric 
Evidence, rigorous testing and evaluation 
AI in education = commercialization of a collective responsibility 
Outsourcing a social, civic, and democratic process of cultivating the coming generation to commercial and capitalist enterprise whose priority is profit

Slide: There are no shortcuts--'ugly social realities' Fear of being left out a fabricated & marketing public relations rhetoric Evidence, rigorous testing and evaluation AI in education = commercialization of a collective responsibility Outsourcing a social, civic, and democratic process of cultivating the coming generation to commercial and capitalist enterprise whose priority is profit

Mic drop from @abeba.bsky.social at UNESCO Digital Learning Week

02.09.2025 15:07 πŸ‘ 179 πŸ” 84 πŸ’¬ 2 πŸ“Œ 8

Exploring Pre-service Teachers' Generative AI Readiness and Behavioral Intentions: A Pilot Study: https://osf.io/3aygt

11.05.2025 18:18 πŸ‘ 2 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
Bayes is using a JASP magic wand to conjure a white rabbit out of a top hat. Artwork by Viktor Beekman (instagram.com/viktordepictor), concept by Eric-Jan Wagenmakers (@ejwagenmakers.bsky.social). Available under a CC-BY license here: https://www.bayesianspectacles.org/artwork-library/

Bayes is using a JASP magic wand to conjure a white rabbit out of a top hat. Artwork by Viktor Beekman (instagram.com/viktordepictor), concept by Eric-Jan Wagenmakers (@ejwagenmakers.bsky.social). Available under a CC-BY license here: https://www.bayesianspectacles.org/artwork-library/

This summer: A week of hybrid workshops. πŸ› οΈβ˜€οΈ
jasp-stats.org/workshops/

Discovering Statistics using JASP

Bayesian Hypothesis Testing with JASP

Machine Learning with JASP

State-of-the-Art Meta-Analysis with JASP

ECs for students available.

07.03.2025 08:41 πŸ‘ 15 πŸ” 12 πŸ’¬ 0 πŸ“Œ 1

I wanted to highlight key findings from our study and the replication, and how they extend to 2024.

Now it provides a systematic review of more than 600 scientific studies on the relationship between digitalization and democracy.

So what does science have to say? We actually know quite a bit: 1/5

08.03.2025 16:01 πŸ‘ 49 πŸ” 24 πŸ’¬ 1 πŸ“Œ 1
Preview
Western Postdoctoral Fellowship Program Western University, in vibrant London, Ontario, delivers an academic and student experience second to none.

Looking for a post-doc? Apply for the Western Postdoctoral Fellowship Program at Western University @westernu.bsky.social in CanadaπŸ‡¨πŸ‡¦. Comes with a competitive salary and a research stipend: www.uwo.ca/research/fun...

06.03.2025 16:56 πŸ‘ 18 πŸ” 19 πŸ’¬ 2 πŸ“Œ 0
A collage where the top photo has Trump smiling glbly in the Oval Office while Musk stands nearby in a t-shirt, baseball cap, and black coat, and where the bottom photo has Trump in the Oval Office pointing angrily at Zelensky, who is wearing a black, high-collar shirt with official Ukrainian insignia.

A collage where the top photo has Trump smiling glbly in the Oval Office while Musk stands nearby in a t-shirt, baseball cap, and black coat, and where the bottom photo has Trump in the Oval Office pointing angrily at Zelensky, who is wearing a black, high-collar shirt with official Ukrainian insignia.

It's hard not to see the hypocrisy of his attacks on Zelensky's choice of clothes.

02.03.2025 16:16 πŸ‘ 92 πŸ” 6 πŸ’¬ 3 πŸ“Œ 1
Preview
Google’s Sergey Brin Asks Workers to Spend More Time In the Office (Gift Article) The tech giant’s co-founder said that if employees worked harder and were in the office more, the company could reach an artificial general intelligence breakthrough.

If "60 hours a week is the sweet spot of productivity," that's only because the tech workers who can put in all those hours at the office have offloaded all their caregiving responsibilities onto others more vulnerable than them.
www.nytimes.com/2025/02/27/t...

28.02.2025 16:04 πŸ‘ 785 πŸ” 200 πŸ’¬ 43 πŸ“Œ 67
Post image

POV: You're 16, believe being in advanced placement math class means you're a once in a generation genius, and have just discovered Reddit.

23.02.2025 11:07 πŸ‘ 11515 πŸ” 1025 πŸ’¬ 315 πŸ“Œ 96

I think we're seeing what happens when one side builds a coalition around collective outrage, and the other side mistakes the appeal of collective outrage for the appeal of particular policies.

23.02.2025 12:04 πŸ‘ 468 πŸ” 81 πŸ’¬ 4 πŸ“Œ 12

And people talk about how Koreans "showed up for their country" but like. Why do you think they showed up where they showed and when they showed up? The opposition party was literally sending SMS alerts and mass-printing glossy color cardstock signs for their voters

14.02.2025 01:31 πŸ‘ 1654 πŸ” 353 πŸ’¬ 25 πŸ“Œ 17

Scientists! Can you share examples of society-run, open-access, non-profit journals that you know of? I'm thinking of this like AERA Open, Journal of Numerical Cognition, Frontline Learning Research

12.02.2025 13:28 πŸ‘ 5 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0
5Γ¨mes ConfΓ©rences Jean Piaget - Sciencesconf.org

We are pleased to announce that the 5th Jean Piaget Conferences will take place from 25 to 27 June 2025 at the University of Geneva.
This year’s conference will be structured around three key axes: development, learning, and teaching.
Submissions : Feb 28th
confpiaget.sciencesconf.org

13.02.2025 08:48 πŸ‘ 6 πŸ” 5 πŸ’¬ 1 πŸ“Œ 0

Kiitos Antti!

12.02.2025 17:56 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Thanks Nicole!

12.02.2025 16:29 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Scientists! Can you share examples of society-run, open-access, non-profit journals that you know of? I'm thinking of this like AERA Open, Journal of Numerical Cognition, Frontline Learning Research

12.02.2025 13:28 πŸ‘ 5 πŸ” 3 πŸ’¬ 2 πŸ“Œ 0

I've got a meeting free day next week and I'm trying so hard to not book anything. Even the potential feels glorious already

07.02.2025 19:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
Preview
INTRODUCTION

Modern-Day Oracles or Bullshit Machines?

Jevin West (@jevinwest.bsky.social) and I have spent the last eight months developing the course on large language models (LLMs) that we think every college freshman needs to take.

thebullshitmachines.com

04.02.2025 16:12 πŸ‘ 2707 πŸ” 990 πŸ’¬ 168 πŸ“Œ 240
Preview
All U.S. federal government websites are already archived by the End of Term Web Archive Here's all the information you might need. Official website: https://eotarchive.org/ Wikipedia:...

Signal Boost: All U.S. federal government websites are already archived by the End of Term Web Archive

Let people know, download your own copies.
Don't let this digital book burn continue.

#Feds #Health #WHO #CDC #AMA #USPHS #FDA #NIH #NCHS #PCORI

31.01.2025 23:19 πŸ‘ 4277 πŸ” 2937 πŸ’¬ 56 πŸ“Œ 69
Post image

πŸ“£ Big news: Lifecycle Journal is now open for submissions! πŸ“£

Lifecycle Journal is a new, innovative, community-driven approach to scholarly publishing, initiated by COS.

Learn more and submit: lifecyclejournal.org/

30.01.2025 19:00 πŸ‘ 73 πŸ” 42 πŸ’¬ 1 πŸ“Œ 6

Hi, Vox reporter here: If you've had a study section, NIH travel, or other NIH-related meeting cancelled (or not), raise your hand! Reply or DM me, and repost for visibility if you're able.

#academicsky @drugmonkey.bsky.social

23.01.2025 18:03 πŸ‘ 624 πŸ” 587 πŸ’¬ 22 πŸ“Œ 9