Peter Kvam

Comparing likelihood-based and likelihood-free approaches to fitting and comparing models of intertemporal choice - Behavior Research Methods Machine learning methods have recently begun to be used for fitting and comparing cognitive models, yet they have mainly focused on methods for dealing with models that lack tractable likelihoods. Eva...

Machine learning / AI approaches can work well for model comparison and fitting, but how do they stack up against likelihood-based methods like hierarchical Bayes / MCMC?

link.springer.com/article/10.3...

(Generally the same for fitting, but neural networks were better for model comparison!)

Society for Mathematical Psychology Online conferences, news, membership functions, and information about the Society

The 2025 MathPsych/ICCM meeting starts tomorrow with a day of workshops and symposia!

#iccmpsyched but can't make it this year? Get your fomo here:

Spoiler: the answer is that they are both special cases of a more general representation of evidence accumulation, and yes you can tell the differences using at least four methods!

As a bonus, we provide machine learning methods for fitting and comparing a variety of evidence accumulation models.

The Tweedledum and Tweedledee of dynamic decisions: Discriminating between diffusion decision and accumulator models - Psychonomic Bulletin & Review Theories of dynamic decision-making are typically built on evidence accumulation, which is modeled using racing accumulators or diffusion models that track a shifting balance of support over time. How...

What are the differences between diffusion and accumulator models, and can you even tell them apart?

"The Tweedledum and Tweedledee of dynamic decisions: Discriminating between diffusion decision and accumulator models" open access link:

link.springer.com/article/10.3...

Now officially out and open access:
doi.org/10.1037/rev0...

Summer Institute

🚨 Applications for the 22nd Summer Institute on Bounded Rationality are now open!

🌐 Join us in Berlin @mpib-berlin.bsky.social from June 17–25, 2025 to explore "Decision Making in a Digital World".

✏️ Application deadline is March 9 - more info at 👇!!

www.mpib-berlin.mpg.de/research/res...

Here's a starter pack for mathematical psychology! please add if you know folks who should be on here go.bsky.app/QNKpfeS

Society for Mathematical Psychology Online conferences, news, membership functions, and information about the Society

I am currently co-organizing a preconference for Psychonomics with the topic "Memory in the Wild". Registration will close soon! Check it out: mathpsych.org/conference/17/

How do people make good decisions when their options change over time, such as dynamic housing markets?

New paper at Psych Review suggests evidence is accumulated for unavailable options -- a serious challenge to "option-specific" diffusion / accumulator models:

psycnet.apa.org/fulltext/202...

First first-author paper submitted; preprint: osf.io/preprints/ps... We (@colinsmithpsych.bsky.social and @peterkvam.bsky.social ) give a tutorial on a mathematical model of attitudes associations, the Tug-of-war model (TOW), as applied to IAT data (N > 10,000). TOW quantifies associations as (1/13)

VOTE NOW! While you are enjoying the Virtual MathPsych/ICCM 2024 pre-recorded presentations, don't forget to hit the ❤️ up at the top for your favorites to vote for the 2024 People's Choice Awards. One award is given for the MathPsych track and one for ICCM track. #iccmpsyched

Don’t miss your opportunity to discuss a career in mathematical psychology with 2022 Senior Fellow Jerome Busemeyer in the live Q&A on June 18 at 12:30 EDT. Watch his "Conversation with a Senior Fellow" at mathpsych.org/presentation...

#iccmpsyched

Society for Mathematical Psychology Online conferences, news, membership functions, and information about the Society

👀 READY FOR VIEWING AT VMP2024 👀

Pre-recorded presentations are posted for viewing for the Judgment session in the "Day 2" room. Live Q&A will start June 18 at 12:00 EDT. #iccmpsyched

mathpsych.org/session/400

Society for Mathematical Psychology Online conferences, news, membership functions, and information about the Society

👀 VIEWING IS LIVE AT VMP2024 👀

Pre-recorded presentations are posted for viewing for the Development & Dynamics session in the "Day 2" room. Live Q&A with the authors will start June 18 at 13:00 EDT. #iccmpsyched

mathpsych.org/session/398

Virtual MathPsych/ICCM 2024 is LIVE at mathpsych.org/conference/16/! 👀 Watch the pre-recorded talks at your leisure. Then join in for the live Q&A with the authors, held via zoom; details on
mathpsych.org/conference/1...

#iccmpsyched

Society for Mathematical Psychology Online conferences, news, membership functions, and information about the Society

👀 WATCH NOW! 👀
Pre-recorded presentations are posted for viewing for the VMP 2024 Methods & Models session in the "Day 1" room. Live Q&A will start June 17, at 12:00 EDT.

mathpsych.org/session/409

#iccmpsyched

👀 READY TO WATCH NOW 👀

Pre-recorded presentations are posted for viewing for the Virtual MathPsych Measurement & Reasoning session in the "Day 1" room. Live Q&A will start June 17, at 13:00 EDT.

mathpsych.org/session/396

#iccmpsyched

👩‍🏫 FAST TALKS ARE LIVE FOR VIEWING! 👨‍🏫

Pre-recorded presentations are posted for viewing for the VMP2024 Fast Talk session in the "Day 1" room. Fast Talks are VMP’s virtual poster sessions. Live Q&A with the authors will start June 17 at 14:00 EDT. 

mathpsych.org/session/397

#iccmpsyched

The 2nd talk in Measurement & Reasoning is “Revisiting the role operational definitions in psychological science” by Peter Kvam @peterkvam.bsky.social

mathpsych.org/presentation...

#iccmpsyched

How do we make choices when our options change over time? In a new paper with @lazyneuron.bsky.social
& Andy Fitch, just accepted at Psych Review, we explore "alternative-general" representations of evidence that allow us to make good decisions even when our options shift.

osf.io/preprints/ps...

No better way to express trust and respect than by firing the people who are working toward creating trust and respect

UF eliminates all DEI-related offices, programs and positions

dystopian

Just got this in an email from UF admin. They like to do this on Friday afternoons so that we can enjoy our weekends.

If only there were a way to stop citing the Florida legislature..

The New Science of Psychology and Evolution Psychology and evolution have a difficult relationship, but AI may help mend it.

A short piece on what we do -- and more importantly, don't -- know about the relationship between human behavior and evolution. Plus, what approaches like computational evolution can tell us:

www.psychologytoday.com/us/blog/defi...

What Is a Scientific Model? Models help us simplify and understand the world around us.

What is a scientific model?

www.psychologytoday.com/us/blog/defi...

Models bridge the gap between what we can understand and what we want to understand -- and extend that bridge in both directions. Now on the front page of Psychology Today!

psychologytoday.com/us

#PsychSciSky #scicomm #science

We often take them for granted, but operational definitions are a weird vestige of early 20th century science. It's time for psychology to leave them behind in favor of better measurement models:

Re-assessing the role of operational definitions in psychology
osf.io/preprints/ps...

(Reposted 🐦🦣🧵)

BlueSky Science-Related Feeds Sheet1 Likes,Name (Click to visit feed),Tags,Contact to ask to be added to contributor list 2,<a href="https://bsky.app/profile/did:plc:ftnzzw4cnon2pzpw7i5m2xu7/feed/aaaiqnkwsgsz6">#AI&HCI</a>,#HCI, ...

New BlueSky Scientists - Find Your Community! 🧪

Put hashtags in your posts to make them appear in subject-specific “feeds.”

Check out this list of hashtags and feeds that BlueSky scientists are using 👇

Click "Add to My Feeds" and "📌" the feeds you like.

Make your own feed! See next post 👉

Debunking AGI inevitability claims Have you heard these claims? "AGI is imminent!" or "At current rate of progress, AGI is inevitable!" In a recent preprint, my co-authors and I explain why, and present a formal proof that, such claims...

Have you heard these claims?

"AGI (short for “artificial general intelligence”) is imminent!"

or

"At current rate of progress, AGI is inevitable!"

We explain why, and present a formal proof that, such claims are false and misleading.

irisvanrooijcogsci.com/2023/09/17/d...