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Michael D. Krämer

@mdkraemer.bsky.social
1.1K followers 1K following 79 posts

Postdoc at UZH | PhD in psychology from FU-Berlin | research interests in personality psych, well-being, and social relationships

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Reposted by Michael D. Krämer
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 · 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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Fabian Kalleitner @kalf.bsky.social · 20/08/2026
The Austrian socio economic panel takes shape! now with two waves available as easy to access scientific use files.
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Henrike Jungeblut @henrikejngblt.bsky.social · 12/08/2026
After a year of intense data collection and another one and a half years of data analysis, I am happy to share that we are now publicly releasing the data from our Mainz Network Study. We are sharing behavioral performance, EEG, and MRI data from over 200 participants. 🧠 osf.io/preprints/ps...
osf.io
OSF
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Communications Psychology @commspsychol.nature.com · 07/08/2026
A new research Article in the journal by Amanda J. Wright and colleagues: www.nature.com/articles/s44... (in Press) @ajwright.bsky.social @mdkraemer.bsky.social @peterhaehner.bsky.social @chopwood.bsky.social @wiebkeb.bsky.social
nature.com
Personality traits are less stable than people think - Communications Psychology
Two studies show that laypeople uniquely rate personality traits as being more stable across the lifespan than 20+ other individual differences, despite the traits having similar and often even larger...
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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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Michael D. Krämer @mdkraemer.bsky.social · 15/07/2026
With all the recent bugs and issues on OSF, I‘m considering switching to www.psycharchives.org for a new project. Has anyone here used it recently and can report on their experience? Does it offer comparable functionality? (for prereg and code/data repo)
psycharchives.org
Home | PsychArchives
PsychArchives is a disciplinary repository for psychological science and neighboring disciplines.
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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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Thùy Vy T Nguyễn @thuyvytnguyen.bsky.social · 12/05/2026
My PhD student is recruiting participants for his study. Please repost and distribute to your networks if you have a chance!
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Michael D. Krämer @mdkraemer.bsky.social · 24/04/2026
How we spend time alone has important consequences for well-being. Over the past year and a half, I’ve delved into the fascinating literature on solitude. Two updates related to this work: - 📚 We conducted a systematic review and meta-analysis on how relatively stable personal and contextual (1/3)
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UZH diff-psy @uzh-diffpsy.bsky.social · 20/04/2026
New theory piece on the mechanisms of personality change, led by @wiebkeb.bsky.social! In the extended ABC consolidation model, we extend previous accounts of how change in momentary states accumulates to lead to enduring trait change. (1 / 3)
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Michael D. Krämer @mdkraemer.bsky.social · 14/03/2026
New publication: doi.org/10.1038/s415... The market for self-help products (SHP) is booming – online (e.g., apps, podcasts) and in traditional media (e.g., books). Many SHP promise psychological self-improvement and happiness increases. Within psychology, however, examinations of SHP use have been
doi.org
Psychological traits predict who uses self-help products but usage is not associated with two-year personality change - Scientific Reports
Self-help products such as books and apps are booming, often promising personal growth and well-being gains. Despite their popularity, little research has examined the psychological predictors and con...
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Lab² @labsquare.net · 27/02/2026
📣 Introducing ManyLabsDACH! We are delighted to announce our new large-scale crowd-science study spanning Germany (D), Austria (A), and Switzerland (CH). Each participating lab will submit one design proposal, and all participating labs will then jointly select the design to be implemented.
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Rosalie Andrae @rosalieandrae.bsky.social · 23/02/2026
My first PhD paper is out 🎉🐣 We examined transactions between Big Five traits and first sexual intercourse across up to 10 years and ~5,000 German adolescents. Extraversion stood out 🔄🧠 Agreeableness + openness showed interesting patterns as well Check them out here: doi.org/10.1177/0890...
doi.org
Sage Journals: Discover world-class research
Subscription and open access journals from Sage, the world's leading independent academic publisher.
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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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Tagesschau Bot @tagesschau.bsky.social · 25/01/2026
Dauerhaftes Single-Sein belastet #Psychologie #Singles
tagesschau.de
Dauerhaftes Single-Sein belastet
Je später junge Erwachsene ihre erste feste Beziehung eingehen, umso mehr sinkt ihre Zufriedenheit, so eine Studie.
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Jamie Cummins @jamiecummins.bsky.social · 22/01/2026
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.app
RegCheck
RegCheck is an AI tool to compare preregistrations with papers instantly.
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Nicholas Tan @nickoras.bsky.social · 20/01/2026
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
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Ruben C. Arslan @ruben.the100.ci · 19/01/2026
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.
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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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Laura Botzet @laura-j-botzet.bsky.social · 15/01/2026
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...
doi.org
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 ...
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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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Charles Driver @charlesdriver.bsky.social · 15/12/2025
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
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...
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Tom Hollenstein @tomhollenstein.bsky.social · 07/12/2025
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...
scientiapsychiatrica.com
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...
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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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Julia Krasko @juliakrasko.bsky.social · 07/11/2025
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
osf.io
OSF
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Rosalie Andrae @rosalieandrae.bsky.social · 04/11/2025
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...
osf.io
OSF
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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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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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Michael D. Krämer @mdkraemer.bsky.social · 22/10/2025
Great opportunity for PhDs! The 2022 Madrid summer school was amazing
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Maike Luhmann 🇪🇺 @maikeluhmann.bsky.social · 20/10/2025
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
Buchcover: "Einsamkeit: Warum sie uns alle betrifft", Autorin: Maike Luhmann, Verlag: S. Fischer.
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Bruno Arpino @brunoarpino.bsky.social · 24/09/2025
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...
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Samantha Joel @datingdecisions.bsky.social · 10/09/2025
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/...
journals.sagepub.com
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...
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Julia M. Rohrer @dingdingpeng.the100.ci · 25/08/2025
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...
Models as Prediction Machines: How to Convert Confusing Coefficients into Clear Quantities

Abstract
Psychological researchers usually make sense of regression models by interpreting coefficient estimates directly. This works well enough for simple linear models, but is more challenging for more complex models with, for example, categorical variables, interactions, non-linearities, and hierarchical structures. Here, we introduce an alternative approach to making sense of statistical models. The central idea is to abstract away from the mechanics of estimation, and to treat models as “counterfactual prediction machines,” which are subsequently queried to estimate quantities and conduct tests that matter substantively. This workflow is model-agnostic; it can be applied in a consistent fashion to draw causal or descriptive inference from a wide range of models. We illustrate how to implement this workflow with the marginaleffects package, which supports over 100 different classes of models in R and Python, and present two worked examples. These examples show how the workflow can be applied across designs (e.g., observational study, randomized experiment) to answer different research questions (e.g., associations, causal effects, effect heterogeneity) while facing various challenges (e.g., controlling for confounders in a flexible manner, modelling ordinal outcomes, and interpreting non-linear models).
Figure illustrating model predictions. On the X-axis the predictor, annual gross income in Euro. On the Y-axis the outcome, predicted life satisfaction. A solid line marks the curve of predictions on which individual data points are marked as model-implied outcomes at incomes of interest. Comparing two such predictions gives us a comparison. We can also fit a tangent to the line of predictions, which illustrates the slope at any given point of the curve.A figure illustrating various ways to include age as a predictor in a model. On the x-axis age (predictor), on the y-axis the outcome (model-implied importance of friends, including confidence intervals).

Illustrated are 
1. age as a categorical predictor, resultings in the predictions bouncing around a lot with wide confidence intervals
2. age as a linear predictor, which forces a straight line through the data points that has a very tight confidence band and
3. age splines, which lies somewhere in between as it smoothly follows the data but has more uncertainty than the straight line.
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UZH diff-psy @uzh-diffpsy.bsky.social · 22/08/2025
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.
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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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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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Noah Greifer @noahgreifer.bsky.social · 04/06/2025
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! 😅
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Michael D. Krämer @mdkraemer.bsky.social · 30/05/2025
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!
tinyurl.com
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...
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Michael D. Krämer @mdkraemer.bsky.social · 30/05/2025
Fantastic speach by @cdrosten.bsky.social on the freedom and responsibilities of researchers in these trying times
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Charles Driver @charlesdriver.bsky.social · 28/05/2025
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
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Michael D. Krämer @mdkraemer.bsky.social · 26/05/2025
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
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Michael D. Krämer @mdkraemer.bsky.social · 23/05/2025
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...
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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Ted Schwaba @tedmond.bsky.social · 20/05/2025
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...
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Michael D. Krämer @mdkraemer.bsky.social · 28/04/2025
Now published at EJP: doi.org/10.1177/0890...
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Georg Henning @georghenning.bsky.social · 24/04/2025
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)
osf.io
OSF
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Maike Luhmann 🇪🇺 @maikeluhmann.bsky.social · 08/04/2025
🚨 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
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Amanda J. Wright @ajwright.bsky.social · 13/03/2025
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
osf.io
OSF
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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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Lukas Schellenberg @schellenberglukas.bsky.social · 24/02/2025
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...
osf.io
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