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
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!
Fantastic speach by @cdrosten.bsky.social on the freedom and responsibilities of researchers in these trying times
Die Keynote bei unserem großen Festakt zum 100-jährigen Jubiläum hielt @cdrosten.bsky.social. Wissenschaftsfreiheit könne nicht die Freiheit zu schweigen bedeuten. Vielmehr müssten Wissenschaftler*innen sich engagieren gegen eine bloße Meinungsmacht. Jetzt nachlesen:
www.diw.de/de/diw_01.c....
www.diw.de/de/diw_01.c....
May 30, 2025 at 11:34 AM
Fantastic speach by @cdrosten.bsky.social on the freedom and responsibilities of researchers in these trying times
Reposted by Michael D. Krämer
Postdoc position open in Zurich -- Prof. Martin Tomasik and I have a joint SNF project on interpretable neural network approaches for large scale, complex item / temporal structure, online learning / cognitive development data.
Please retweet.
tinyurl.com/PostdocGNNSNF
Please retweet.
tinyurl.com/PostdocGNNSNF
May 28, 2025 at 11:16 AM
Postdoc position open in Zurich -- Prof. Martin Tomasik and I have a joint SNF project on interpretable neural network approaches for large scale, complex item / temporal structure, online learning / cognitive development data.
Please retweet.
tinyurl.com/PostdocGNNSNF
Please retweet.
tinyurl.com/PostdocGNNSNF
How do people differ in pursuing their social lives? In a new paper at JPSP, lead by Cornelia Wrzus, we examined the affiliation motive (and other social traits) as moderators of how people dynamically regulate their social interactions. Across two studies with experience sampling and
May 26, 2025 at 5:59 PM
How do people differ in pursuing their social lives? In a new paper at JPSP, lead by Cornelia Wrzus, we examined the affiliation motive (and other social traits) as moderators of how people dynamically regulate their social interactions. Across two studies with experience sampling and
Interested in the computational reproducibilty of research papers? @psychscience.bsky.social Psych Science is looking to extend their network of people providing checks of reviewed manuscrips: www.psychologicalscience.org/publications...
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...
www.psychologicalscience.org
May 23, 2025 at 5:06 PM
Interested in the computational reproducibilty of research papers? @psychscience.bsky.social Psych Science is looking to extend their network of people providing checks of reviewed manuscrips: www.psychologicalscience.org/publications...
Reposted by Michael D. Krämer
Extremely excited to share the first effort of the Revived Genomics of Personality Consortium: A highly-powered, comprehensive GWAS of the Big Five personality traits in 1.14 million participants from 46 cohorts. www.biorxiv.org/content/10.1...
May 20, 2025 at 10:14 AM
Extremely excited to share the first effort of the Revived Genomics of Personality Consortium: A highly-powered, comprehensive GWAS of the Big Five personality traits in 1.14 million participants from 46 cohorts. www.biorxiv.org/content/10.1...
Now published at EJP: doi.org/10.1177/0890...
Still friends with people you randomly met in a university study group? 👯🧑🎓 In this preprint with André Kretzschmar,
@chopwood.bsky.social, and
@wiebkeb.bsky.social, we looked at social influences on personality change in a design that randomized first-semester students to peer groups (1/4)
@chopwood.bsky.social, and
@wiebkeb.bsky.social, we looked at social influences on personality change in a design that randomized first-semester students to peer groups (1/4)
April 28, 2025 at 7:49 PM
Now published at EJP: doi.org/10.1177/0890...
Reposted by Michael D. Krämer
New preprint with @rebiweidmann.bsky.social @sophiepotter.bsky.social Dikla Segel-Karpas and Jenna Wünsche:
"When you're with me, baby, the skies will be blue for all my life? A dyadic longitudinal study of relationship happiness through midlife"
osf.io/preprints/ps...
(1/5)
"When you're with me, baby, the skies will be blue for all my life? A dyadic longitudinal study of relationship happiness through midlife"
osf.io/preprints/ps...
(1/5)
OSF
osf.io
April 24, 2025 at 2:43 PM
New preprint with @rebiweidmann.bsky.social @sophiepotter.bsky.social Dikla Segel-Karpas and Jenna Wünsche:
"When you're with me, baby, the skies will be blue for all my life? A dyadic longitudinal study of relationship happiness through midlife"
osf.io/preprints/ps...
(1/5)
"When you're with me, baby, the skies will be blue for all my life? A dyadic longitudinal study of relationship happiness through midlife"
osf.io/preprints/ps...
(1/5)
Reposted by Michael D. Krämer
🚨 Job alert - please share!
I'm looking for a doctoral researcher (3 years, 75%) to join my #ERC project #Loneliness across time and space (LOTIS) at @ruhr-uni-bochum.de, starting June 1 or later.
Details in thread 👇
#PsychSciSky
I'm looking for a doctoral researcher (3 years, 75%) to join my #ERC project #Loneliness across time and space (LOTIS) at @ruhr-uni-bochum.de, starting June 1 or later.
Details in thread 👇
#PsychSciSky
April 8, 2025 at 6:29 AM
🚨 Job alert - please share!
I'm looking for a doctoral researcher (3 years, 75%) to join my #ERC project #Loneliness across time and space (LOTIS) at @ruhr-uni-bochum.de, starting June 1 or later.
Details in thread 👇
#PsychSciSky
I'm looking for a doctoral researcher (3 years, 75%) to join my #ERC project #Loneliness across time and space (LOTIS) at @ruhr-uni-bochum.de, starting June 1 or later.
Details in thread 👇
#PsychSciSky
Reposted by Michael D. Krämer
New preprint!
Ever heard that personality doesn't change? Do you believe that? (you shouldn't)
Using data from an online survey (n = 887) & eight longitudinal datasets (n = 166,971), we compared perceived vs. actual lifespan changes in personality and 20+ individual differences (1/8)
osf.io/ytmxp
Ever heard that personality doesn't change? Do you believe that? (you shouldn't)
Using data from an online survey (n = 887) & eight longitudinal datasets (n = 166,971), we compared perceived vs. actual lifespan changes in personality and 20+ individual differences (1/8)
osf.io/ytmxp
OSF
osf.io
March 13, 2025 at 9:00 PM
New preprint!
Ever heard that personality doesn't change? Do you believe that? (you shouldn't)
Using data from an online survey (n = 887) & eight longitudinal datasets (n = 166,971), we compared perceived vs. actual lifespan changes in personality and 20+ individual differences (1/8)
osf.io/ytmxp
Ever heard that personality doesn't change? Do you believe that? (you shouldn't)
Using data from an online survey (n = 887) & eight longitudinal datasets (n = 166,971), we compared perceived vs. actual lifespan changes in personality and 20+ individual differences (1/8)
osf.io/ytmxp
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
On the level of nuances (items), we found some evidence for the corresponsive
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...
journals.sagepub.com
March 3, 2025 at 7:16 PM
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
On the level of nuances (items), we found some evidence for the corresponsive
Reposted by Michael D. Krämer
New Preprint Alert!
Why do people differ in their self-esteem development after a negative life event?
With M. Altorfer, and @peterhaehner.bsky.social, I addressed this question by studying self-esteem changes over six months after a negative life event.
Full preprint here: osf.io/preprints/ps...
Why do people differ in their self-esteem development after a negative life event?
With M. Altorfer, and @peterhaehner.bsky.social, I addressed this question by studying self-esteem changes over six months after a negative life event.
Full preprint here: osf.io/preprints/ps...
OSF
osf.io
February 24, 2025 at 2:58 PM
New Preprint Alert!
Why do people differ in their self-esteem development after a negative life event?
With M. Altorfer, and @peterhaehner.bsky.social, I addressed this question by studying self-esteem changes over six months after a negative life event.
Full preprint here: osf.io/preprints/ps...
Why do people differ in their self-esteem development after a negative life event?
With M. Altorfer, and @peterhaehner.bsky.social, I addressed this question by studying self-esteem changes over six months after a negative life event.
Full preprint here: osf.io/preprints/ps...