Michael D. Krämer
Postdoc at UZH | PhD in psychology from FU-Berlin | research interests in personality psych, well-being, and social relationships
- Reposted by Michael D. KrämerThe 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. KrämerDauerhaftes Single-Sein belastet #Psychologie #Singles
- Reposted by Michael D. KrämerComparing 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
- Reposted by Michael D. KrämerVery 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
- Reposted by Michael D. Krämer3 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. KrämerRemaining single in your twenties is linked to lower life satisfaction
- Reposted by Michael D. KrämerNew 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...
- 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!
- 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).
- Reposted by Michael D. KrämerThe 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
- Reposted by Michael D. KrämerSo...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...
- Reposted by Michael D. KrämerWant 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...
- Reposted by Michael D. KrämerWhy 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
- Reposted by Michael D. KrämerNew 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...
- 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)
- growing market. In a representative Swiss sample, we found that users were more likely to be women, more educated and younger adults, those higher in openness, lower in emotional stability and self-esteem, and those desiring to change their personality. Notably, there were no differences in (2/3)
- change in personality and well-being between users and non-users, and among users depending on usage intensity. Thanks to @wiebkeb.bsky.social for making data collection possible in the PERCIVAL study, and to the rest of the team, Eva Asselmann, Claudia Harzer, and Jaap Denissen 🎉 (3/3)
- 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
- Reposted by Michael D. KrämerAuf 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
- Reposted by Michael D. KrämerNew 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...
- Reposted by Michael D. KrämerIn 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. KrämerEver 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...
- Reposted by Michael D. KrämerWie 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).
- 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...
- Excited to share this preprint on personality interventions that I've been working on the last year together with Travis Miller, @chopwood.bsky.social , and @wiebkeb.bsky.social : osf.io/eb6p7 🥳🥳 We compared two intervention programs: self-improvement and self-acceptance in (1/7)
- Updated preprint available at: osf.io/preprints/ps...
- Reposted by Michael D. KrämerStarting 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!
- ...with @wiebkeb.bsky.social, @chopwood.bsky.social, @peterhaehner.bsky.social, @rosalieandrae.bsky.social and Philippe Sloksnath & Lina Hungerbühler who are not on here yet 🦋
- 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....
- Reposted by Michael D. KrämerPostdoc 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
- 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
- mobile sensing, affiliation motive predicted a stronger momentary social desire and future social interactions (but only when assessed with mobile sensing). See the open-access paper for more results including on the valence and voluntariness of social interactions: doi.apa.org/doi/10.1037/...
- Amazing team 🙏, with @yannickroos.com, @ramonaschoedel.bsky.social, Mitja Back, and @drichter77.bsky.social. Without them this paper and data collection wouldn‘t have been possible. Btw, the combined experience sampling and mobile sensing data of Study 2 are now openly available as part of the
-
View full threadStudy 1 data also available on OSF! 👀
- 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...
- Especially skills and access to software other than R are currently lacking (Stata, Mplus, hell even SPSS😅)
- Reposted by Michael D. KrämerExtremely 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)
- Reposted by Michael D. KrämerNew 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)
- 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
- Reposted by Michael D. KrämerNew 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
- 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
- principle of personality development. For example, those who reported to worry more, were more likely to take on informal caregiving and in turn started worrying even more as they increased their time investment. Similarly for being less lazy and more considerate! We used the Dutch LISS, German
- SOEP, and Australian HILDA data 🇳🇱🇩🇪🇦🇺
- Reposted by Michael D. KrämerNew 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...
- Reposted by Michael D. KrämerDoes smartphone use make people feel lonelier? Or does loneliness predict smartphone use? We combined experience sampling data with smartphone usage data to examine the bidirectional association between well-being and smartphone use over time. Published in @apajournals.bsky.social Emotion! 🧵 👇
- Reposted by Michael D. KrämerMein DFG Projekt läuft im Juni aus, bin also danach potentiell für Jobs zu haben. Ab jetzt freu ich mich immer wenn ihr mir was schickt, vorzugsweise Berlin aber nicht nur, möglichst Forschung. Meine Schwerpunkte sind Alters- , und Entwicklungs-, aber auch Persönlichkeits- und Arbeitspsychologie
- Reposted by Michael D. KrämerAre you interested in age or cohort or period effects? I have just updated my primer on the topic! Now with a new framing, a handy flow chart to determine which approach may be suitable, and a new empirical example. What do people in Germany think about mothers who work? osf.io/preprints/ps...
- New preprint! osf.io/preprints/ps... The age-period-cohort problem is something that many researchers are vaguely aware of. There have been very cool advances in how to reason about it which don't seem to be well-known in psych. So, I've written a primer!
- I talked to Özge Fischer-Baum from @psychscience.bsky.social about our recent paper on informal caregivers‘ wellbeing! Their podcast Under the Cortex is a really fun format 😊 www.psychologicalscience.org/news/utc-202...
- Reposted by Michael D. KrämerNew research by @juliastern.bsky.social and colleagues finds that lifelong singles have lower life satisfaction scores compared to those in relationships. #Relationships #Marriage
- Reposted by Michael D. KrämerEver wondered whether our personality influences our first sexual milestone? 🍒 We explored how the Big Five traits affect the timing of first sexual experiences — and how these, in turn, shape personality traits over time. Check out our preprint: doi.org/10.31234/osf... #PersonalityPsych
- Reposted by Michael D. KrämerHow should we score divergent thinking tasks to best assess the ability to generate creative ideas? 🤔 It’s a big question in creativity research, so we systematically compared different scoring approaches to evaluate their psychometric quality. Check out our findings! doi.org/10.1002/jocb...
- Check out Laura‘s new paper that compares weill-being in parents and childless people over loooong time spans!!!
- Good news for #childlesscatladies : similar life satisfaction from 18-65 with or without kids. Childless people experienced better mental health and fewer negative emotions than parents. Only fathers (but not mothers) felt less lonely than their childless peers. www.hu-berlin.de/en/press-por...
- Reposted by Michael D. KrämerA study by @wiebkeb.bsky.social & @mdkraemer.bsky.social shows caregiving lowers life satisfaction and raises anxiety, depression, and loneliness. #SupportCaregivers
- Check out these two preprints on life events and personality change where the amazing @peterhaehner.bsky.social put in tons of meticulous work to analyze ALL the available panel data on the topic! In addition to meta-analyses across data sets, two ShinyApps show all the individual results 🎉
- +++ New Preprint Alert +++ Together with @ajwright.bsky.social, @mdkraemer.bsky.social, and @wiebkeb.bsky.social, I worked on two coordinated data analyses to examine event-related personality changes. CDA1: osf.io/preprints/ps... CDA2: osf.io/preprints/ps... ⬇️Details below⬇️
- Reposted by Michael D. KrämerMore than happy to share that our manuscript investigating „Differences Between Lifelong Singles and Ever-Partnered Individuals in Big Five Personality Traits and Life Satisfaction“ across 27 countries is now available online at Psychological Science (journals.sagepub.com/doi/10.1177/...)! A 🧵:
- Reposted by Michael D. KrämerAre singles with the least lifetime involvement in romantic relationships "single at heart" and therefore with the best well-being outcomes? Our new paper in Psychological Science suggests, on average, no (N = 77,064, mainly ≥ 50 years, 27 countries). journals.sagepub.com/doi/10.1177/...
- How does providing informal care affect people's well-being? @wiebkeb.bsky.social and I used longitudinal data to examine this question across different well-being aspects, 3 countries (🇳🇱, 🇩🇪, 🇦🇺), and several moderators. See below for a thread or @psychscience.bsky.social : doi.org/10.1177/0956...
- In temporal models of within-person change, we found that life satisfaction, affective experiences, depression/anxiety, and loneliness decreased relatively consistently when people became informal caregivers. These decreases were often more pronounced and longer-lasting for women.
- In models of the intensity of care provision, we found that informal caregivers further declined in well-being when they spent more time on caregiving (across almost all models).
-
View full threadcountries) and strained healthcare systems that potentially limit access to formal care options. This was a very fun project, and also my first project that was officially checked for reproducibility (as per the new @psychscience.bsky.social policy). Not sure if I'm allowed to reveal who checked 😄
- Check out this recently published paper lead-authored by my PhD colleague Yannick Roos (who's not on Bluesky): doi.org/10.1037/pspp... We examined in 2 studies how contextual social factors (e.g., neighborhood, household composition) relate to differential regulation of social interactions in daily
- life. Both household and dwelling density moderated how quickly people transitioned from solitude to social interactions. For preprint, see osf.io/preprints/ps... Thanks to Yannick for taking the lead, and to @drichter77.bsky.social and Cornelia Wrzus for supervising us in this exciting project 😊
- Reposted by Michael D. Krämerthe fallout from the Francesca Gino research misconduct scandal isn't over. @engber.bsky.social writes about how an effort by some of her colleagues to self-audit their work with her ended up raising even more questions — for them personally and their whole field www.theatlantic.com/magazine/arc...
- Reposted by Michael D. KrämerFor this EU project on #loneliness, I am looking for a #postdoc! More details: jobs.ruhr-uni-bochum.de/jobposting/4...
- Reposted by Michael D. KrämerNew preprint 🤗 Life events are a commonly studied environmental factor believed to influence normal-range personality development (such as the Big Five), but how well does this extend to features of personality pathology? (1/7) t.co/PyPkEUATP3
- Reposted by Michael D. KrämerNew preprint! osf.io/preprints/ps... The age-period-cohort problem is something that many researchers are vaguely aware of. There have been very cool advances in how to reason about it which don't seem to be well-known in psych. So, I've written a primer!
- Already excited for the @dgps.bsky.social congress next week in Vienna? 🇦🇹 If you're around on Wed. 9:30, we'd love to see you in our symposium on social drivers of personality change w/ Manon van Scheppingen, Larissa Wieczorek, Eva Bleckmann, & @rosalieandrae.bsky.social (who created this graphic😊)
- 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)
- of 3 to 6 fellow students who were strangers initially but met several times over the course of the semester. At first glance, we found evidence for small but significant assimilation effects of personality, that is, an individual becoming more like the remaining group (2/4)
- members. This partly replicated earlier work by economists. However, further robustness checks provided convincing evidence that these effects were due to the statistical artifact of regression to the mean and should not be taken at face value. For example, for one of the (3/4)
- checks, we randomly shuffled group membership and estimated very similar effects -- same when we reversed the ordering of time. We discuss theoretical and methodological implications for studying personality development though social relationships: osf.io/rd8ms (4/4)
- Excited to share this preprint on personality interventions that I've been working on the last year together with Travis Miller, @chopwood.bsky.social , and @wiebkeb.bsky.social : osf.io/eb6p7 🥳🥳 We compared two intervention programs: self-improvement and self-acceptance in (1/7)
- their effects on personality (current / ideal) and well-being aspects. We assumed that both programs would decrease the discrepancy between current and ideal personality; the self-improvement intervention by boosting current personality and the self-acceptance intervention (2/7)
- by tempering ideal personality ratings. Unexpectedly, we found across two studies that both intervention programs improved current personality ratings and well-being similarly, while ideal personality remained stable. Even more striking, in Study 2, a waitlist control group (3/7)
-
View full threadthe specificity of assumed change factors and develop and adopt stronger study designs that account for method biases such as expectancy and demand effects. (7/7)
