Julia Stern
@juliastern.bsky.social
1.1K followers 270 following 35 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
Posts Media Videos Starter Packs
Reposted by Julia Stern
gmacdonalduoft.bsky.social
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.
Reposted by Julia Stern
niclaskuper.bsky.social
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...
Reposted by Julia Stern
stresslabvienna.bsky.social
Read our new meta-analyses paper on the connection between stress and premenstrual symptoms. Congratulations to Celine Bencker for leading this project!
celinebencker.bsky.social
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....
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
doi.org
Reposted by Julia Stern
celinebencker.bsky.social
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....
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
doi.org
Reposted by Julia Stern
drlutzboehm.bsky.social
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...
www.mdpi.com
Reposted by Julia Stern
mdkraemer.bsky.social
Check out our preprint - the result of a really fun collaboration!
berndschaefer.bsky.social
New preprint: osf.io/8c6sz_v1
@mdkraemer.bsky.social and I, with our fantastic co-authors Cornelia Wrzus, Yannick Roos and @drichter77.bsky.social examined how social contact, desire, and affect dynamically interact across different modalities (in-person, digital) and time scales (hourly, daily).
OSF
osf.io
Reposted by Julia Stern
gmacdonalduoft.bsky.social
New MacLab paper. Do people partner up to save on rent? Apparently not.
uoftpsychology.bsky.social
Money can’t buy love but it might be a necessary first step, psychologists find.

New research by @gmacdonalduoft.bsky.social shows that single people with higher incomes are more likely to want a relationship, think they are ready for one, and start one up.

💙 www.psych.utoronto.ca/news/money-c...
Composite image of hands holding hearts, money, and a credit card.
Reposted by Julia Stern
drboothroyd.bsky.social
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 😊
Reposted by Julia Stern
cmolho.bsky.social
Many thanks to HBES for this recognition and congratulations to Rising Stars @mohammadatari.bsky.social @danielredhead.bsky.social @juliastern.bsky.social 💫
humbehevosoc.bsky.social
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...
Reposted by Julia Stern
humbehevosoc.bsky.social
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...
Reposted by Julia Stern
humbehevosoc.bsky.social
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...
Reposted by Julia Stern
ruben.the100.ci
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)
Reposted by Julia Stern
mdkraemer.bsky.social
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...
Reposted by Julia Stern
mariame.bsky.social
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). ⬇️
mariame.bsky.social
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
Reposted by Julia Stern
ruben.the100.ci
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
Reposted by Julia Stern
dingdingpeng.the100.ci
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/...
juliastern.bsky.social
Join us at Psych Science! We're currently recruiting volunteers helping with reproducibility checks for conditionally accepted manuscripts. Important tasks - great team - recommended!
Reposted by Julia Stern
mariame.bsky.social
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
Reposted by Julia Stern
simine.com
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....
Reposted by Julia Stern
drboothroyd.bsky.social
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
Reposted by Julia Stern
i4replication.bsky.social
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!