Eric Hehman
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erichehman.bsky.social
Eric Hehman
@erichehman.bsky.social

prejudice, person perception at McGill | https://prejudicemap.org

Psychology 43%
Neuroscience 16%
Pinned
We had a new tutorial on representational similarity analysis come out recently. Led by @xallysie.bsky.social with Ruoying Zheng and @chujunlin.bsky.social

This technique lets you compare patterns across diff types of measures (eg correlate correlation matrices), super flexible

Pretty black box, so validated on a variety of posting behaviors, and hate speech. Those expressing more needs were more engaged in these hate group chats. The Relatedness need was also associated with more hate speech (though shakier).

Check it out if interested

4/end

We estimated Discord user's needs using an approach which was new to me and kinda cool, you align their written posts with the semantic structure of established basic psychological needs self-report scales. To the extent they align more, you infer more needs. Pic shows this

3/n

Psychological needs are more recently being used to understand extremist behavior. Theoretically you join to feel autonomy, competence, have friends. The dataset is quite large, 20,000,000 posts from 90,000 users in 233 rooms, many of these chats were various hate groups.

2/n

New paper out led by my student Jeremy Rappel using a natural language processing approach to examine behavior in leaked far right Discord chatrooms.

We find that *estimated* basic psychological needs are related to posting behavior and use of hate speech.
1/n
journals.sagepub.com/doi/10.1177/...

Also agree, Biggest (new) issue is data collection. Local politics always been an issue (just particularly poignant now)
The International Social Cognition Network (ISCON) is pleased to announce Dr. April Bailey as the 2025 winner of the Early Career Award! Dr. Bailey is a Lecturer of Psychology at the University of Edinburgh. She earned her B.A. from Colgate University and her PhD in 2019 from Yale University.
Exclusive: The U.S. Coast Guard will no longer classify the swastika, nooses and the Confederate flag as hate symbols.

The military service drafted a new policy that classifies them as “potentially divisive.”
U.S. Coast Guard will no longer classify swastikas, nooses as hate symbols
The military service, which falls under the Department of Homeland Security, has drafted a new policy that classifies such items “potentially divisive.”
www.washingtonpost.com

Reposted by Eric Hehman

💡New research suggests that suggest that basic psychological needs provide an important and largely untapped theoretical framework for understanding extremist participation and radicalization.

Read more in #SPPS: ow.ly/YW5b50Xrla5
🚨 New paper alert, at @jexpsocpsych.bsky.social:

Classic person perception models argue that group information (e.g., group valence) dominates impression formation, especially in less-than-optimal conditions. But is this really the case?

👉 Read the full paper
authors.elsevier.com/a/1m66p51f8w...

Reposted by Eric Hehman

When do interaction/moderation effects stabilize in linear regression?: https://osf.io/35t84

Reposted by Eric Hehman

How do we succeed at self-control? In a new paper in @pnas.org with James Wilson, David Kalkstein, and Melissa Ferguson, we use mouse-tracking of ~47,000 decisions of long-term over short-term to show that 'willpower' is too narrow a conception of self-control www.pnas.org/doi/abs/10.1...
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
Three German universities offering post-docs for researchers "who cannot conduct or continue their work in the USA appropriately because of actual political pressure. "
www.uni-konstanz.de/zukunftskoll...
Early Career Rescue Fellowship
www.uni-konstanz.de

Reposted by Eric Hehman

Our new study shows that living in states with higher levels of structural sexism was associated with worse cardiovascular disease outcomes for both men and women, especially for diabetes and stroke.

@pahoman.bsky.social @deborascience.bsky.social

www.sciencedirect.com/science/arti...
Immigration raids during Trump II have increased daily student absences by 22 percent in the California Central Valley, with largest increases among the youngest students.
Ouch

Reposted by Eric Hehman

My colleague Falk Lieder and I are hiring a new post-doc at UCLA to join the #WiseJudgementConsortium. The ad is here: recruit.apo.ucla.edu/JPF10650
Postdoctoral Scholar
University of California, Los Angeles is hiring. Apply now!
recruit.apo.ucla.edu
Appreciated the chance to share @arajo-eunkyung.bsky.social and I's work on Streetview Sampling on 🎃! The 📸🚘 costume is only for today, but the methods paper and tools are open access: guilfordjournals.com/doi/pdf/10.1...
🎉 @rpsychologist.com 's PowerLMM.js is the online statistics application of the year 2025 🎉

powerlmmjs.rpsychologist.com

- Calculate power (etc) for multilevel models
- Examine effects of dropout and other important parameters
- Fast! (Instant results)

This is an impressively bad photo haha, but the work seems really interesting! Any chance of getting access to the poster somehow?

Deadline approaching! (Nov 1) Please consider submitting your fave 2024 paper for the ISCON best paper award
ISCON now seeking nominations for the 2024 Best Social Cognition Paper Award!

This award recognizes an outstanding article (theoretical or empirical) in the field of social cognition. Papers eligible if published in 2024.

More info here: www.socialcognition.net/best-paper-a...
Best Paper Award | Home
www.socialcognition.net

So, check it out if this seems useful to you! Done with @xallysie.bsky.social , @eugenekofosu.bsky.social and Gabe Nespoli
/end

That said I've since learned that we are basically brute forcing a math proof of the law of large numbers and approaching population parameters. Convinced this is true, but for me the tool far easier to use practically and we still use it internally all the time. Other approaches in the paper
5/n

Initially an internal tool we made a good while ago to answer some qs and guide data collection. But we made it public with a little write up. And then that white paper got more citations than much of my real empirical work. So seemed useful to folks, and we decided to write it up.
4/n

Having stable ratings trims out some error from your overall model, optimizes data collection so you don't waste money, and helps you plan how many ratings to collect for x rating (for example)
3/n

For people who collect a bunch of ratings, combine them in some way (avg), and then analyze those averages. These avg ratings are "stable" when more ratings wouldn't meaningfully change the avg. When more raters agree on a rating, stability is achieved faster, but this varies by stim and trait.
2/n

Reposted by David Chester

We have a new tutorial out in Social Cog methods issue, a resampling tool we made in R that basically tells you when some average is "stable" and can be used to guide data collection or test hypotheses related to variance. Quick explanation here
1/n

guilfordjournals.com/doi/10.1521/...
#AcademicSky #PrejudiceResearch #PsychSciSky

Our new paper out in American Psychologist.

Led by Meleady, with @debshulman.bsky.social, Kotzur, & Crisp.

Contact "ruptures" (going to university; studying abroad) ==> changes in outgroup attitudes longitudinally

psycnet.apa.org/doiLanding?d...
Context Matters, Doesn't It? The Role of Context in Everyday Emotion Regulation Strategy Use: https://osf.io/axzk6

Reposted by Eric Hehman

There is a robust link between intergroup contact & reduced prejudice, but does contact actually cause a reduction in prejudice?

Across multiple longitudinal data sets (N > 20,000), very few people reported increased contact AND reduced prejudice.

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