Peter Haehner

Effects of a theory-based smartphone intervention to decrease neuroticism in the general public: https://osf.io/m8a5r

Personality Predictors of Health, Well-Being, Relationships, and Employment in Namibia, Kenya, and South Africa: A Three-Year Longitudinal Study: https://osf.io/apx63

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

Personality Trait Change in Three Sub-Saharan Countries: Normative Development and Life Events: http://osf.io/85dvn_v1/

In the last months, I supervised two super-talented research interns (unfortunately Bluesky-less). They were interested in how self-esteem develops after negative events and examined this question in a longitudinal study over 6 months.

You can find their results here:

osf.io/preprints/ps...

Ever 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

Uhh, this sounds very interesting! I'll reach out to you via email the next days! 😊

And here is a list of all current and former lab members that have arrived at BlueSky:

bsky.app/profile/did:...

(If I missed your account, let me know and I will add you.)

Together with @maikeluhmann.bsky.social, @berndschaefer.bsky.social and bluesky-less Debora Brickau and Till Kaiser

#perpsy

Finally, we found preliminary evidence that also the perception of specific event types differs across the lifespan

Furthermore, controlling for event type, the perception of major life events differed across age.

We found that there are expectable differences across age groups regarding the reported event types and domains

The perception of major life events across the life course To better understand the effects of life events, research interest recently turned to the question of how life events are perceived (e.g., as positive, predictable, or controllable). However, research...

The question I've got asked most frequently at conferences when I was presenting something on the perception of life events was whether there are any age differences.

Using data from the SOEP-IS, we addressed this simple but interessting question.

Open-access link: doi.org/10.1371/jour...

Informal Caregivers Report Reduced Well-Being, May Not Bounce Back Years Later Individuals acting as caregivers saw a decrease in life satisfaction and mood, alongside increases in depression, anxiety, and loneliness.

A study by @wiebkeb.bsky.social & @mdkraemer.bsky.social shows caregiving lowers life satisfaction and raises anxiety, depression, and loneliness. #SupportCaregivers

#perpsy

Together with amazing @ajwright.bsky.social and @wiebkeb.bsky.social 🥳

In a mini meta-analysis (7 studies, 26 effect sizes), we found initial evidence that interventions that aim to facilitate VPC are successful in doing so: d = 0.22.

We compared effect sizes on volitional personality change with normative personality changes and psychotherapy:

In a systematic literature search, we then identified 30 studies on volitional personality change. Overall, we found that simply having a change goal was only weakly related to volitional personality change.

In a frist step, we tried to integrate contemporary theories on volitional personality change:

A systematic review of volitional personality change research - Communications Psychology Meta-analytic evidence finds interventions aimed at altering personality traits were successful in promoting change. A review of nonintervention studies, finds having the goal to change personality is...

Can people intentionally change their personality?

Happy to share that our review on volitional personality change research has now been published at Nature Communications.

Open-Access-Link: doi.org/10.1038/s442...

Argh, this was not how the images were supposed to look like. Another try:

Integrating data from 8 panel studies, we found several replicable moderators of event-related personality changes. However, each moderator explained only a small proportion of the variance of event-related changes.

The review revealved that only age and gender have frequently been considered as moderators of event-related personality changes.

CDA2: Which variables can predict individual differences in event-related personality changes?

To better understand why people differ in their personality development in context of life events, we conducted a systematic review and a CDA across 8 panel studies.

Findings partly replicated the results of the meta-analysis but also differed in some important regards. Here an overview of which findings replicated (dark shading = finding emerged in our CDA and existing MA):

... for some life events were relatively small and the meta-analysis only examined pre-post event changes.

To overcome these limitations, we conducted a coordinated data analysis across 7 large-scale panel studies (N = 195,000), with 2-10 times larger samples size per event than the existing MA.

CDA1: Do life events predict mean-level changes in personality traits?

Research on event-related personality traits has been inconsistent. A recent meta-analysis (Bühler et al., 2024) integrated the available evidence. However, due to limited availability of effect sizes, sample sizes...

+++ 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⬇️

One of the best things about doing research is when you aim to do one thing but an unexpected more interesting thing happens. We were concerned that #perpsy intervention research focused too much on changing and not enough on accepting. We compared these approaches and this happened: