Michael D. Krämer
@mdkraemer.bsky.social
Postdoc at UZH | PhD in psychology from FU-Berlin | research interests in personality psych, well-being, and social relationships
Reposted by Michael D. Krämer
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-...
Do Boosts in Well-Being from Partnering Last?
The importance of tracking both those who partner and those who stay single longitudinally
unromanticprof.substack.com
January 26, 2026 at 4:23 PM
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-...
Reposted by Michael D. Krämer
Dauerhaftes Single-Sein belastet#Psychologie#Singles
Dauerhaftes Single-Sein belastet
Je später junge Erwachsene ihre erste feste Beziehung eingehen, umso mehr sinkt ihre Zufriedenheit, so eine Studie.
www.tagesschau.de
January 25, 2026 at 7:48 AM
Dauerhaftes Single-Sein belastet#Psychologie#Singles
Reposted by Michael D. Krämer
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
RegCheck was built to help make this process easier.
Today, we launch RegCheck V2.
🧵
regcheck.app
RegCheck
RegCheck is an AI tool to compare preregistrations with papers instantly.
regcheck.app
January 22, 2026 at 11:05 AM
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
RegCheck was built to help make this process easier.
Today, we launch RegCheck V2.
🧵
regcheck.app
Reposted by Michael D. Krämer
Very excited to share our preprint (in press at Psychological Science) titled
"Associations between meat consumption and depression are small and unlikely to be causal". Have a read: lnkd.in/eM8Cd6Ss
@mdkraemer.bsky.social @peterhaehner.bsky.social @wiebkeb.bsky.social @chopwood.bsky.social
"Associations between meat consumption and depression are small and unlikely to be causal". Have a read: lnkd.in/eM8Cd6Ss
@mdkraemer.bsky.social @peterhaehner.bsky.social @wiebkeb.bsky.social @chopwood.bsky.social
LinkedIn
This link will take you to a page that’s not on LinkedIn
lnkd.in
January 20, 2026 at 9:48 AM
Very excited to share our preprint (in press at Psychological Science) titled
"Associations between meat consumption and depression are small and unlikely to be causal". Have a read: lnkd.in/eM8Cd6Ss
@mdkraemer.bsky.social @peterhaehner.bsky.social @wiebkeb.bsky.social @chopwood.bsky.social
"Associations between meat consumption and depression are small and unlikely to be causal". Have a read: lnkd.in/eM8Cd6Ss
@mdkraemer.bsky.social @peterhaehner.bsky.social @wiebkeb.bsky.social @chopwood.bsky.social
Reposted by Michael D. Krämer
3 months later, this is still unsolved? When I search for preprints I know are on psyarxiv via DuckDuckGo/Google, I don't find them (only their traces on the web), maybe because you broke working links and indexers delisted? This is really bad.
January 19, 2026 at 10:05 AM
3 months later, this is still unsolved? When I search for preprints I know are on psyarxiv via DuckDuckGo/Google, I don't find them (only their traces on the web), maybe because you broke working links and indexers delisted? This is really bad.
Reposted by Michael D. Krämer
Remaining single in your twenties is linked to lower life satisfaction
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.
www.psypost.org
January 16, 2026 at 1:01 PM
Remaining single in your twenties is linked to lower life satisfaction
Reposted by Michael D. Krämer
New paper – and my first ✨Registered Report✨: Do hormonal contraceptives affect women’s sexuality?
We studied both average effects and individual differences in effects using longitudinal data: doi.org/10.1177/2700...
We studied both average effects and individual differences in effects using longitudinal data: doi.org/10.1177/2700...
Positive Treatment Effects and High Heterogeneity of Hormonal Contraceptive Use on Women’s Sexuality - Laura J. Botzet, Julia M. Rohrer, Lars Penke, Ruben C. Arslan, 2026
Different women experience hormonal contraceptives differently, reporting side effects on their sexuality that range from negative to positive. But research on ...
doi.org
January 15, 2026 at 8:14 AM
New paper – and my first ✨Registered Report✨: Do hormonal contraceptives affect women’s sexuality?
We studied both average effects and individual differences in effects using longitudinal data: doi.org/10.1177/2700...
We studied both average effects and individual differences in effects using longitudinal data: doi.org/10.1177/2700...
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!
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!
January 7, 2026 at 3:33 PM
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!
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!
Reposted by Michael D. Krämer
The Department of Psychology @uzh-ch.bsky.social has an open position for a tenured Lecturer (Research) «Psychological Data Management and -Stewardship»
jobs.uzh.ch/job-vacancie...
#psychjobs
jobs.uzh.ch/job-vacancie...
#psychjobs
UZH: Lecturer Research «Psychological Data Management and -Stewardship»
The Department of Psychology at the University of Zurich invites applications for a tenured Lecturer Research position for «Psychological Data Management and -Stewardship». We are seeking an enthusias...
jobs.uzh.ch
December 15, 2025 at 11:39 AM
The Department of Psychology @uzh-ch.bsky.social has an open position for a tenured Lecturer (Research) «Psychological Data Management and -Stewardship»
jobs.uzh.ch/job-vacancie...
#psychjobs
jobs.uzh.ch/job-vacancie...
#psychjobs
Reposted by Michael D. Krämer
So...my undergrad thesis student is doing a quality analysis of studies found in meta-analyses. She identified a few and we contacted the authors to request their effect sizes and other variables for the studies in their papers.
Here's what happened:
scientiapsychiatrica.com/index.php/Sc...
Here's what happened:
scientiapsychiatrica.com/index.php/Sc...
The Impact of Social Media on Adolescent Mental Health: A Meta-Analysis | Scientia Psychiatrica
Introduction: The proliferation of social media has raised significant concerns about its potential effects on the mental health of adolescents. This meta-analysis aims to provide a comprehensive asse...
scientiapsychiatrica.com
December 7, 2025 at 11:11 PM
So...my undergrad thesis student is doing a quality analysis of studies found in meta-analyses. She identified a few and we contacted the authors to request their effect sizes and other variables for the studies in their papers.
Here's what happened:
scientiapsychiatrica.com/index.php/Sc...
Here's what happened:
scientiapsychiatrica.com/index.php/Sc...
Reposted by Michael D. Krämer
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...
uni-wh.softgarden.io/job/61280592...
December 3, 2025 at 12:48 PM
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...
uni-wh.softgarden.io/job/61280592...
Reposted by Michael D. Krämer
Why do some people feel lonelier than others? Drawing on 441 effects, our meta-analysis shows a clear link between insecure attachment orientations (anxious or avoidant) and loneliness (r= .38).
Read the preprint: osf.io/preprints/ps...
Together with Natalie Kazianis & @bueckersusanne.bsky.social
Read the preprint: osf.io/preprints/ps...
Together with Natalie Kazianis & @bueckersusanne.bsky.social
OSF
osf.io
November 7, 2025 at 8:06 AM
Why do some people feel lonelier than others? Drawing on 441 effects, our meta-analysis shows a clear link between insecure attachment orientations (anxious or avoidant) and loneliness (r= .38).
Read the preprint: osf.io/preprints/ps...
Together with Natalie Kazianis & @bueckersusanne.bsky.social
Read the preprint: osf.io/preprints/ps...
Together with Natalie Kazianis & @bueckersusanne.bsky.social
Reposted by Michael D. Krämer
New preprint!
Many claim that first sex is a huge risk for teens. We tested that claim in a large, nationally representative German sample. Core question: Do first sexual experiences harm adolescents, or do they reflect prior well-being?
osf.io/preprints/ps...
Many claim that first sex is a huge risk for teens. We tested that claim in a large, nationally representative German sample. Core question: Do first sexual experiences harm adolescents, or do they reflect prior well-being?
osf.io/preprints/ps...
OSF
osf.io
November 4, 2025 at 9:42 AM
New preprint!
Many claim that first sex is a huge risk for teens. We tested that claim in a large, nationally representative German sample. Core question: Do first sexual experiences harm adolescents, or do they reflect prior well-being?
osf.io/preprints/ps...
Many claim that first sex is a huge risk for teens. We tested that claim in a large, nationally representative German sample. Core question: Do first sexual experiences harm adolescents, or do they reflect prior well-being?
osf.io/preprints/ps...
Reposted by Michael D. Krämer
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)
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
osf.io
November 2, 2025 at 5:47 PM
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)
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)
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)
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
osf.io
November 2, 2025 at 5:47 PM
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)
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)
Great opportunity for PhDs! The 2022 Madrid summer school was amazing
☀️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
Template: osf.io/76ej2/files/...
Apply Nov 2-20: www.conftool.org/ssps2026
#SSPS #eapp
October 22, 2025 at 9:19 AM
Great opportunity for PhDs! The 2022 Madrid summer school was amazing
Reposted by Michael D. Krämer
Auf Englisch sagt man, "I have a book inside me." Das hatte ich bis vor kurzem auch, aber jetzt nicht mehr - denn ich habe es tatsächlich (fast) geschrieben, und am 24.3.2026 wird es so erscheinen:
#Einsamkeit
#Einsamkeit
October 20, 2025 at 2:54 PM
Auf Englisch sagt man, "I have a book inside me." Das hatte ich bis vor kurzem auch, aber jetzt nicht mehr - denn ich habe es tatsächlich (fast) geschrieben, und am 24.3.2026 wird es so erscheinen:
#Einsamkeit
#Einsamkeit
Reposted by Michael D. Krämer
New paper out 🎓:
Personality Traits and Provision of Grandparental Childcare: Evidence from Europe (w/ @valeriabordone.bsky.social, Giorgio Di Gessa & @mdkraemer.bsky.social
Using data from @share-eric.bsky.social, we find personality matters for grandhild care provision
doi.org/10.1080/1535...
Personality Traits and Provision of Grandparental Childcare: Evidence from Europe (w/ @valeriabordone.bsky.social, Giorgio Di Gessa & @mdkraemer.bsky.social
Using data from @share-eric.bsky.social, we find personality matters for grandhild care provision
doi.org/10.1080/1535...
September 24, 2025 at 1:31 PM
New paper out 🎓:
Personality Traits and Provision of Grandparental Childcare: Evidence from Europe (w/ @valeriabordone.bsky.social, Giorgio Di Gessa & @mdkraemer.bsky.social
Using data from @share-eric.bsky.social, we find personality matters for grandhild care provision
doi.org/10.1080/1535...
Personality Traits and Provision of Grandparental Childcare: Evidence from Europe (w/ @valeriabordone.bsky.social, Giorgio Di Gessa & @mdkraemer.bsky.social
Using data from @share-eric.bsky.social, we find personality matters for grandhild care provision
doi.org/10.1080/1535...
Reposted by Michael D. Krämer
In a new paper, my colleagues and I set out to demonstrate how method biases can create spurious findings in relationship science, by using a seemingly meaningless scale (e.g., "My relationship has very good Saturn") to predict relationship outcomes. journals.sagepub.com/doi/10.1177/...
Pseudo Effects: How Method Biases Can Produce Spurious Findings About Close Relationships - Samantha Joel, John K. Sakaluk, James J. Kim, Devinder Khera, Helena Yuchen Qin, Sarah C. E. Stanton, 2025
Research on interpersonal relationships frequently relies on accurate self-reporting across various relationship facets (e.g., conflict, trust, appreciation). Y...
journals.sagepub.com
September 10, 2025 at 6:18 PM
In a new paper, my colleagues and I set out to demonstrate how method biases can create spurious findings in relationship science, by using a seemingly meaningless scale (e.g., "My relationship has very good Saturn") to predict relationship outcomes. journals.sagepub.com/doi/10.1177/...
Reposted by Michael D. Krämer
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...
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...
August 25, 2025 at 11:49 AM
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...
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...
Reposted by Michael D. Krämer
Wie verändert sich unsere Persönlichkeit über ein Jahr? Dazu starten wir heute eine neue Studie und suchen nach Teilnehmenden zwischen 18-40 Jahren, die Interesse haben, Einblicke in ihre Persönlichkeit, Wohlbefinden und Verhalten über ein Jahr zu erhalten und bis zu 173 CHF (~185€) zu verdienen.
August 22, 2025 at 8:12 AM
Wie verändert sich unsere Persönlichkeit über ein Jahr? Dazu starten wir heute eine neue Studie und suchen nach Teilnehmenden zwischen 18-40 Jahren, die Interesse haben, Einblicke in ihre Persönlichkeit, Wohlbefinden und Verhalten über ein Jahr zu erhalten und bis zu 173 CHF (~185€) zu verdienen.
Check out our preprint - the result of a really fun collaboration!
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).
@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
July 21, 2025 at 7:48 PM
Check out our preprint - the result of a really fun collaboration!
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...
June 16, 2025 at 6:18 PM
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 Michael D. Krämer
Starting to look like I might not be able to work at Harvard anymore due to recent funding cuts. If you know of any open statistical consulting positions that support remote work or are NYC-based, please reach out! 😅
June 4, 2025 at 7:02 PM
Starting to look like I might not be able to work at Harvard anymore due to recent funding cuts. If you know of any open statistical consulting positions that support remote work or are NYC-based, please reach out! 😅
We are conducting a meta-analysis on personal and contextual predictors of solitude. We're looking for unpublished research such as theses, unpublished manuscripts, conference submissions etc.
Full call for data: tinyurl.com/4hur45cw
Please reskeet, or message me if you know unpublished research!
Full call for data: tinyurl.com/4hur45cw
Please reskeet, or message me if you know unpublished research!
MA solitude: Call for unpublished data
Meta-analysis on solitude: Call for unpublished data Dear colleagues, We are conducting a meta-analysis on personal and contextual predictors of solitude. Currently, we are looking for unpublished r...
tinyurl.com
May 30, 2025 at 4:55 PM
We are conducting a meta-analysis on personal and contextual predictors of solitude. We're looking for unpublished research such as theses, unpublished manuscripts, conference submissions etc.
Full call for data: tinyurl.com/4hur45cw
Please reskeet, or message me if you know unpublished research!
Full call for data: tinyurl.com/4hur45cw
Please reskeet, or message me if you know unpublished research!