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Julia Stern

@juliastern.bsky.social
1.1K followers 280 following 43 posts

Personality & Psychological Assessment @UniBremen, Mom 👦🏼👶🏼 I study Personality and Individual Differences (broadly), in relation to Hormones, Menstrual Cycle, Puberty, Mating, Singlehood, Voices, personality perception & development #OpenScience

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Reposted by Julia Stern
Vishnu Sreekumar @vishnusreekumar.bsky.social · 05/08/2026
There is also another call for papers on “Advancing Psychological Science Using Large Language Models” that you should all check out: www.psychologicalscience.org/publications... Stay tuned for a few more upcoming special issues on underrepresented populations and descriptive research.
psychologicalscience.org
Special Issue Call for Submissions: “Advancing Psychological Science Using Large Language Models”
Editors: Jamie Cummins and Ruben C. ArslanPsychological Science invites submissions for a special issue on psychological science involving large language models. We welcome theoretically and empirical...
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Vishnu Sreekumar @vishnusreekumar.bsky.social · 05/08/2026
📢 ***Call for papers at Psychological Science (APS)*** Dr Roni Porat and I are editing a special issue, "From Lab to Life: Psychological Science in the Real World.” Please see the detailed call here (www.psychologicalscience.org/publications...) and send us your best work!
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Ted Schwaba @tedmond.bsky.social · 02/09/2026
Our big Big Five GWAS, out today! Personality Genomics is extremely hot in 2026.
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simine vazire @simine.com · 02/09/2026
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
journals.sagepub.com
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
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simine vazire @simine.com · 28/08/2026
Psych Science (the journal) is broader than you might think! Do you do descriptive research? Or research w/ underrepresented populations or cultural frameworks? Or research on AI/LLMs for psych? Or research testing lab findings in the real world? We have a special issue for that!
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simine vazire @simine.com · 10/08/2026
Special issue at Psych Science on psychology research using LLMs Theoretical & methodological work welcome. Read the full call for important info about what we’re looking for! Submission deadline: 15 March 2027 (15 October 2026 for Registered Reports) www.psychologicalscience.org/publications...
psychologicalscience.org
Special Issue Call for Submissions: “Advancing Psychological Science Using Large Language Models”
Editors: Jamie Cummins and Ruben C. ArslanPsychological Science invites submissions for a special issue on psychological science involving large language models. We welcome theoretically and empirical...
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Reposted by Julia Stern
simine vazire @simine.com · 10/08/2026
Special issue at Psych Science on psychological science in the real world! Send us your best work looking at whether effects from the lab (or from theories) hold up in ecologically valid settings. Submission deadline: 15 January 2027 www.psychologicalscience.org/publications...
psychologicalscience.org
Special Issue Call for Submissions: “From Lab to Life: Psychological Science in the Real World”
Editors: Roni Porat and Vishnu SreekumarPsychological Science invites submissions presenting innovative research that brings psychological science “into the wild,” whether to strengthen its ecological...
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Anne Reitz @annereitz.bsky.social · 28/07/2026
📢 We’re hiring! Postdoc in Personality Psychology & Psychological Assessment at the University of Greifswald. ✨ Lots of freedom for your own research ✨ Start Oct 2026 or later ✨ Long-term perspective toward a permanent position Deadline: 15 Aug Please share — and feel free to get in touch!
uni-greifswald.de
Research Associate (Postdoc) - Institute of Psychology 26/Sa23
Stellenausschreibung Institut für Psychologie
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Julia Stern @juliastern.bsky.social · 06/07/2026
I'm hiring! I am currently establishing my new Research Group for Personality Psychology at Ulm University and am looking for a motivated researcher to join the team starting October 1, 2026 (or by arrangement). 🧵👇 (1/4) 🔗 Full description and details: stellenangebote.uni-ulm.de/jobposting/a...
stellenangebote.uni-ulm.de
Akademische/r Beschäftigte/n (m/w/d) - Abt. Persönlichkeitspsychologie - Referenz-Nr. 26091
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Jessie Sun @jessiesun.bsky.social · 07/07/2026
Interested in doing a postdoc with me in Auckland, New Zealand? 🇳🇿 See info below on a competitive award opportunity, and please spread the word!
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Julia Stern @juliastern.bsky.social · 06/07/2026
I'm hiring! I am currently establishing my new Research Group for Personality Psychology at Ulm University and am looking for a motivated researcher to join the team starting October 1, 2026 (or by arrangement). 🧵👇 (1/4) 🔗 Full description and details: stellenangebote.uni-ulm.de/jobposting/a...
stellenangebote.uni-ulm.de
Akademische/r Beschäftigte/n (m/w/d) - Abt. Persönlichkeitspsychologie - Referenz-Nr. 26091
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Michael D. Krämer @mdkraemer.bsky.social · 24/04/2026
project, we‘re hiring a PhD student at the University of Zurich who will be supervised by @wiebkeb.bsky.social and myself. If you are interested or know someone who might be, you can find more information on the position here: jobs.uzh.ch/job-vacancie... (3/3)
jobs.uzh.ch
UZH: Doctoral (PhD) position
The chair of Individual Differences and Assessment (headed by Prof. Dr. Wiebke Bleidorn) focuses on measuring, explaining, and predicting the structures and processes of personality that underlie huma...
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Geoff MacDonald 🇨🇦 @gmacdonalduoft.bsky.social · 26/01/2026
The effect of life events on personality and well-being is a hot topic. But our new paper on the effects of romantic partnering suggests you need to also consider the effect of NOT experiencing the life event. unromanticprof.substack.com/p/do-boosts-...
unromanticprof.substack.com
Do Boosts in Well-Being from Partnering Last?
The importance of tracking both those who partner and those who stay single longitudinally
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Brent W. Roberts @bwroberts.bsky.social · 20/01/2026
A bit of a Festivus inspired post about CLPMs and RI-CLPMs: floggingpvalues.blog/2026/01/20/t...
floggingpvalues.blog
The Inconceivability of the CLPM and RI-CLPM
Written by Brent Roberts and not ChatGTP. Really* The existence of an observational scientist can be a frustrating affair. Relegated to second class citizen status due to interest in phenomena that…
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PsyPost @psypost.bsky.social · 16/01/2026
Remaining single in your twenties is linked to lower life satisfaction
psypost.org
Remaining single in your twenties is linked to lower life satisfaction
A longitudinal analysis of British and German youth finds that staying single through the twenties correlates with rising loneliness and falling life satisfaction, widening the gap with partnered peers.
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Michael D. Krämer @mdkraemer.bsky.social · 07/01/2026
Excited to see this paper now in print at JPSP! doi.org/10.1037/pspp... You can find the postprint version here: osf.io/8c6sz_v2 Thanks again to @berndschaefer.bsky.social (shared 1st author 🙏), Cornelia Wrzus, Yannick Roos and @drichter77.bsky.social for the great collaboration!
doi.org
APA PsycNet
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Ruben C. Arslan @ruben.the100.ci · 03/12/2025
Want to make nice graphs with me, starting next year? I'm hiring for a position at the University of Witten/Herdecke. uni-wh.softgarden.io/job/61280592...
 ‘A fragmented field: Construct and measure proliferation in psychology.’ (2025)From ‘Language models accurately infer correlations between psychological items and scales from text alone.’ (2025)From ‘Not within spitting distance: salivary immunoassays of estradiol have subpar validity for predicting cycle phase.’ (2023)Work in progress with cycle tracking data from the app Clue
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Björn E. Hommel @bjoernhommel.bsky.social · 26/11/2025
🚨 SynthNet is out 🚨 Researchers propose new constructs and measures faster than anyone can track. We (@anniria.bsky.social @ruben.the100.ci) built a search engine to check what already exists and help identify redundancies; indexing 74,000 scales from ~31,500 instruments in APA PsycTests. 🧵1/3
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Tom Hardwicke @tomhardwicke.bsky.social · 24/11/2025
Congratulations to @simine.com well deserved winner of the Einstein Foundation Individual Award for Promoting Quality in Research 2025 🎉 www.einsteinfoundation.de/en/media/pre...
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Julia M. Rohrer @dingdingpeng.the100.ci · 24/11/2025
I think it's hard to overstate how much Simine has changed research practices and standards in psychology for the better, despite at times massive resistance from powerful parties with a vested interest in maintaining the status quo. Very well deserved award imho 🥳
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Michael D. Krämer @mdkraemer.bsky.social · 02/11/2025
New preprint! 📚📱 osf.io/3kpf9_v1 Did you ever stand in a bookshop and wondered who tends to buy self-help books, and whether people who buy them actually change? Here, we looked at these questions for self-help products more generally (also apps, seminars, etc.), which are a rapidly (1/3)
osf.io
OSF
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European Association of Personality Psychology (EAPP) @eapp-official.bsky.social · 22/10/2025
☀️To all Master’s & PhD students: Join the Summer School of Personality Science 2026 (July 15–19, Edinburgh) for a week of research training, mentoring & networking in personality psychology. Template: osf.io/76ej2/files/... Apply Nov 2-20: www.conftool.org/ssps2026 #SSPS #eapp
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Geoff MacDonald 🇨🇦 @gmacdonalduoft.bsky.social · 15/09/2025
Is the idea that getting into a romantic relationship increases well-being a myth? A new MacLab paper says no. And I had so much to say about this work, I started a Substack: The Unromantic. Links for the paper and the Substack in replies.
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Niclas Kuper @niclaskuper.bsky.social · 03/09/2025
Very excited to share our new manuscript accepted at JPSP: "Cultural Differences in the Personality Triad: The Interplay of Personality Traits, Situation Characteristics, and Behavioral States Around the World"
researchgate.net
(PDF) Cultural differences in the personality triad: The interplay of personality traits, situation characteristics, and behavioral states around the world
PDF | Understanding the interplay of persons, situations, and behavior (the Personality Triad) is a key task of psychology. However, previous research... | Find, read and cite all the research you nee...
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Niclas Kuper @niclaskuper.bsky.social · 14/08/2025
Excited to share this new preprint with Simon Breil, Katharina Utesch & Mitja Back: "Predicting More Behavior More of the Time: On the Behavioral Nature of Different Personality Trait Measures" osf.io/preprints/ps...
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StressLab UniVienna @stresslabvienna.bsky.social · 12/08/2025
Read our new meta-analyses paper on the connection between stress and premenstrual symptoms. Congratulations to Celine Bencker for leading this project!
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Celine Bencker @celinebencker.bsky.social · 11/08/2025
How are #stress and premenstrual symptoms connected? And are those with a #trauma history more likely to have #PMS or #PMDD? 🌩️ Our systematic review & three meta-analyses combine evidence from 66 studies to explore these questions. Excited our work is finally out! ✨ 👉 doi.org/10.1192/bjp....
doi.org
Associations between premenstrual symptoms and (traumatic) stress: a systematic review and three multilevel meta-analyses | The British Journal of Psychiatry | Cambridge Core
Associations between premenstrual symptoms and (traumatic) stress: a systematic review and three multilevel meta-analyses
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Dr. Lutz Böhm @drlutzboehm.bsky.social · 24/07/2025
I ❤️ MDPI Schaut euch mal die Editoren dieses Special Issues an. Dann schaut mal bei allen Artikeln auf die Autorenliste. Und dann sagt mir, ob euch etwas auffällt. Special Issue: "Towards Autonomous Operation of Biologics and Botanicals" www.mdpi.com/journal/proc...
mdpi.com
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Michael D. Krämer @mdkraemer.bsky.social · 21/07/2025
Check out our preprint - the result of a really fun collaboration!
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Geoff MacDonald 🇨🇦 @gmacdonalduoft.bsky.social · 08/07/2025
New MacLab paper. Do people partner up to save on rent? Apparently not.
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Lynda Boothroyd @drboothroyd.bsky.social · 02/07/2025
Saw off two PhD students and one MRes student this morning. Happy day 🥳🍾. If you want an amazing PhD of developmental body image hit up Dr Louise Hanson; for a post doc on voices I cannot recommend Dr @jrut.bsky.social highly enough. And Joe McAdam is looking for PhD funding too 😊
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Catherine Molho @cmolho.bsky.social · 24/06/2025
Many thanks to HBES for this recognition and congratulations to Rising Stars @mohammadatari.bsky.social @danielredhead.bsky.social @juliastern.bsky.social 💫
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Human Behavior & Evolution Society @humbehevosoc.bsky.social · 23/06/2025
HBES is happy to recognize the following Rising Stars (<8 years post-PhD) for their research contributions: Mohammad Atari: mohammadatari.com Catherine Molho: catherinemolho.github.io Daniel Redhead: www.rug.nl/staff/d.j.re... Julia Stern: www.uni-bremen.de/en/pppd/team...
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Human Behavior & Evolution Society @humbehevosoc.bsky.social · 23/06/2025
Congrats to HBES Rising Star Julia Stern, for her evolutionary work on personality, including its effects on well-being, mate choice, as well as the development and hormonal correlates of personality: www.uni-bremen.de/en/pppd/team...
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Ruben C. Arslan @ruben.the100.ci · 23/06/2025
New results from one of the few preregistered, placebo-controlled combined oral contraceptive RCTs. No pill effects found on preferences for masculine or symmetric faces, no menstrual cycle effects. N=340, so small effects may have gone undetected. www.sciencedirect.com/science/arti...
We provide the first evidence from a randomized double-blind placebo control study of oral contraceptives on women's preferences for masculine and symmetric faces in men. We find no evidence of an effect. Similar, our correlational results testing for an association between menstrual cycle phases and facial preferences fail to reject the null hypothesis of no association, as do our estimated correlations between hormone levels and facial preferences. Although the early literature largely found support for variation in facial preferences over the menstrual cycle and with oral contraceptive use (Feinberg et al., 2008; Johnston et al., 2001; Little et al., 2002; Little et al., 2013; Penton-Voak et al., 1999; Roney & Simmons, 2008), our null results align with more recent large-sample correlational studies (Jones et al., 2018; Marcinkowska et al., 2019). One possible motivation of the hypothesis that oral contraceptives lower the preferences for facial masculinity and symmetry is in terms of the dual mating theory. In a recent review of the literature Jones et al. (2019) point out several methodological problems in the early work testing this hypothesis, such as low statistical power, and conclude that recent and methodologically stronger work fails to support the hypothesis. Our findings lend further support for their conclusions.
There are also several reasons for why false positive results could have been published in the earlier literature. Low statistical power increases the probability for false positive results as well as inflated effect sizes. Many of the older studies also rely on self-reported menstrual cycle data, which is subject to mismeasurement. In addition, without pre-analysis plans there is room for the so-called “researcher degrees of freedom” (Simmons et al., 2011) to influence the analysis such that statistically significant results become more likely to be false positive ones. This can occur through excluding observations, using covariates, testing…Table 2. The effect of OC on facial preferences.

Empty Cell	% Change in Facial Preferences
(Follow-Up - Baseline)	Difference	P-value of difference
Empty Cell	Treatment (N = 165)	Placebo (N = 168)	Empty Cell	Empty Cell
Masculine Faces	−0.083	−0.034	−0.049	0.162
Empty Cell	(0.026)	(0.023)	(0.035)	
Symmetric Faces	−0.025	0.027	−0.052	0.132
Empty Cell	(0.024)	(0.025)	(0.034)
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Michael D. Krämer @mdkraemer.bsky.social · 16/06/2025
Self-improvement, self-acceptance, and/or methods effects? Travis Miller, @chopwood.bsky.social , and @wiebkeb.bsky.social, and I examined factors that might explain personality change intervention effects - now in print at JPSP 🥳: doi.org/10.1037/pspp...
doi.org
APA PsycNet
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Maria Meier @mariame.bsky.social · 04/06/2025
Do you work with #hormones? 🚶‍♂️🐁 🧫 Have you ever tried to share your data or worked with datasets and encountered challenges? #NODES aims to develop a standard data format for hormones to remedy this. Participate in our Delphi study to let us know what should be considered (open until mid June). ⬇️
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Ruben C. Arslan @ruben.the100.ci · 11/06/2025
Join me at the University of Witten/Herdecke for research on meta scientific topics, replication work or other fun things :-) as well as teaching some IMO wonderful students short.sg/j/56902143
short.sg
Wissenschaftliche/r Mitarbeiter/in (w/m/d) am Lehrstuhl für Psychologische Forschungsmethoden bei Universität Witten/Herdecke
Wir suchen: Wissenschaftliche/r Mitarbeiter/in (w/m/d) am Lehrstuhl für Psychologische Forschungsmethoden (Teilzeit) • Alfred-Herrhausen-Straße 50, 58455 Witten, Deutschland
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Julia M. Rohrer @dingdingpeng.the100.ci · 06/06/2025
Now officially out with nice formatting and all 🥳 "Thinking clearly about age, period, and cohort effects" -- a gentle introduction to the age-period-cohort problem and how to "solve" it through various types of assumptions. journals.sagepub.com/doi/10.1177/...
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Julia Stern @juliastern.bsky.social · 23/05/2025
Join us at Psych Science! We're currently recruiting volunteers helping with reproducibility checks for conditionally accepted manuscripts. Important tasks - great team - recommended!
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Russ Poldrack @russpoldrack.org · 23/05/2025
Psychological Science is looking for volunteers to join REPEAT—our new network of computational reproducibility checkers. Please join us if you have the time and skills! www.psychologicalscience.org/publications...
psychologicalscience.org
Call for Volunteers: Psychological Science REPEAT Network
Are you passionate about ensuring the reproducibility of scientific research? The journal Psychological Science is looking for volunteers to join REPEAT—our new network of computational reproducibilit...
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Maria Meier @mariame.bsky.social · 21/05/2025
Important #NODES updates🔥 (2/2) We are now recruiting experts (human & animal researchers, clinicians etc) in the field of (psycho)neuroendocrinology that volunteer to fill our survey 📝 survey.questionstar.com/NODES-Delphi... Results will be used as a starting point to develop the data structure.
NODES Delphi study

Are you studying hormones? 
We need your expertise!
https://survey.questionstar.com/NODES-Delphi-round1

We are an interdisciplinary group of researchers from the field of psychoneuroendocrinology. We all have extensive experience in working with hormonal data and faced major challenges when trying to access and reuse datasets from others.

We want to develop a community-driven standard data structure to facilitate data sharing and reuse in our field – and we need your input to do so. Scan the QR code to participate in our Delphi study!

For more info on the project visit: https://www.nodes-pne.eu
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Association for Psychological Science @psychscience.bsky.social · 13/05/2025
Why Should You Trust Research Published in #PsychologicalScience? Read @simine.com's Editorial, NOW online
journals.sagepub.com
Why Should You Trust Research Published in Psychological Science? - Simine Vazire, 2025
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simine vazire @simine.com · 08/05/2025
My editorial on how journals can earn trust. We often use journal names as proxies for quality. This is bad bc it’s not valid. But it could be. Editors could make journal name a valid signal. And we could place value on journals that show us how they do that. journals.sagepub.com/doi/full/10....
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Lynda Boothroyd @drboothroyd.bsky.social · 17/04/2025
Valerie Baettig asks whether Tsimane women experience PMS. Answer: possibly slightly but not enough that they notice. Also: across the 10 women cycles were super variable hormonally. More evidence we need hormone controls in cycle studies! #ehbea #ehbea2025
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Institute for Replication @i4replication.bsky.social · 04/04/2025
Papers published in Psych Science following January 1st, 2024 are candidates for I4R to computationally reproduce, stress-test and replicate. This is an official collaboration with @psychscience.bsky.social. journals.sagepub.com/doi/10.1177/... We are looking for reproducers and replicators!
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Nadira Faber @nadirafaber.bsky.social · 19/03/2025
We're searching for a new colleague at Uni Bremen: *Full Professor in Cognitive Neuroscience*! Includes researcher positions to fill & use of labs for e.g. (f)MRI,fNIRS,EEG, eyetracking. fMRI expertise desired. Please share! www.uni-bremen.de/en/universit... #AcademicSky #PsychSciSky #neuroskyence
uni-bremen.de
Job Vacancies - Universität Bremen
Offene Stellen
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Victor Shiramizu @victorshiramizu.bsky.social · 19/03/2025
Our meta-analysis on changes in oral contraceptive use and partnered women's sexual satisfaction is now published in Hormones and Behavior. w/ @juliastern.bsky.social, @fbartos.bsky.social, Yasaman Rafiee, @tvpollet.bsky.social, and Ben Jones. www.sciencedirect.com/science/arti...
sciencedirect.com
Testing the congruency hypothesis using meta-analysis: Are changes in oral contraceptive use correlated with partnered women's sexual satisfaction?
Based on claims that changes in women's hormone levels influence their mating psychology, the Congruency Hypothesis proposes that women in relationshi…
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Ruben C. Arslan @ruben.the100.ci · 18/03/2025
Want to make nice graphs with me, starting this summer? I am hiring for two PhD positions at the University of Witten/Herdecke.
Treemap chart showing the fragmented landscape of psychological measures.
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Michael D. Krämer @mdkraemer.bsky.social · 03/03/2025
Together with @wiebkeb.bsky.social I investigated how personality relates to who takes on informal caregiving, and how informal care responsibilities in turn affect personality: journals.sagepub.com/doi/10.1177/... On the level of nuances (items), we found some evidence for the corresponsive
journals.sagepub.com
Informal care and personality: Selection and socialization effects - Michael D. Krämer, Wiebke Bleidorn, 2025
Informal caregiving provides societally important healthcare functions but can take a toll on caregivers, with negative consequences for well-being. However, li...
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