Just out in Social Networks w. @snannabell.bsky.social: The Duality of Network Ties and Attributes. As part of the special issue on duality, we argue that the principle applies to multi-modal network data. It allows relating different types of tie and other dyadic attributes. 1/3

We illustrate the principle with a multiple correspondence analysis of 15 sociometric nominations (interpersonal relations, interest / aversion to collaborations in mathematics and physical education), foci-of-activity, individual attributes, and attribute combinations in eight school classes. 2/3

Apart from the relative meanings of nominations, we analyze the meanings of one-sided nominations for friendship and sympathy. Our analysis points to one-sided nominations marking weaker ties than reciprocated ones, rather than asymmetric interest among class mates. 3/3

Our colleagues @corneliusholler.de and @snannabell.bsky.social just got back from @sunbelt2025paris.bsky.social, held at the beautiful @sorbonne-universite.fr. An inspiring conference with excellent talks, engaging discussions, and plenty of fresh ideas for their future research.

Seismic scoop from @lenasun.bsky.social: A long-time anti-vaxer who was disciplined for practising medicine without a license has been selected by #HHS to conduct the study RFK Jr. wants looking yet again at whether vaccines cause autism. www.washingtonpost.com/health/2025/...

We had an enriching two-day workshop on #LinearMixedModels with Prof. Oliver Schilling from #HeidelbergUniversity #Psychology! 🙌 Day 1 focused on the theoretical foundations, while day 2 emphasized practical applications. Thanks to Prof. Schilling for this excellent workshop! 👏

Thrilled to share that our paper on achievement goals and peer networks has been published in the British Journal of Educational Psychology! doi.org/10.1111/bjep... It was fun working on this with my colleagues @corneliusholler.de and Yannick Hill! Looking forward to our continued collaboration :)

Reviving-like prosocial behavior in response to unconscious or dead conspecifics in rodents www.science.org/doi/10.1126/...

The Pentagon has abruptly scrapped its entire social science research program. The decision “is short-sighted and harmful to U.S. national security,” @jaylyall.bsky.social told me. It “suggests they don’t care about better understanding threats the U.S. faces,” says @busbyj2.bsky.social.

Zuerst präsentiert @snannabell.bsky.social Ergebnisse zum Zusammenhang von multidimensionalen Zielorientierungen (3x2 Achievement Goal Questionnaire) und Peerbeziehungen im Sportunterricht. #AchievementGoals

Ich freue mich, in den nächsten Tagen in Mannheim auf der #GEBF2025 zu sein! Kommt am Montag um 15:15 Uhr in EO 169 in die Sitzung "PS-15: Sportunterricht als sozialer Kontext" und hört Vorträge von mir und @snannabell.bsky.social! #AcademicSky #EducationResearch #Sport #SNA @gebf25.bsky.social

This @natrevpsych.bsky.social paper on self-control by @wilhelmhofmann.bsky.social is one of the papers that had the biggest impact on my thinking this year. Will's call for going beyond the individual level (e.g., willpower) & considering environmental/societal factors is critically important.

By mapping the meanings of the words used to communicate emotions across more than one-third of the planet’s spoken languages, a study in Science found that there is significant variation in how emotions are expressed across cultures. #ScienceMagArchives scim.ag/41X6dDk

Our doctoral students brought the year to a close with their monthly breakfast and annual Secret Santa. We wish them and everyone happy holidays and a good start to the new year! #academicsky #phdlife

This weekend, I went for a trail run with friends @sgerwann.bsky.social. I wasn’t very fast, and the distance wasn’t very long compared to my friends. But it’s not always about being the best: Taking in the beauty of the trail, sharing these moments with friends, and much more (Kurz, 1977) matters.