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Jan Philippe de Haan

@janpdehaan.bsky.social
187 followers 363 following 10 posts

Psychologist (M. Sc.) and PhD student @ipmb-tubs.bsky.social @tu-braunschweig.de. Interested in statistics, psychophysics and behavioral adaptation. R enthusiast. [he/him]

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Reposted by Jan Philippe de Haan
worm @rfksbrainworm.bsky.social · 02/10/2026
If you ever wondered why visible light is those particular wavelengths, it's because life evolved to see in the narrow range where water is transparent
Diagram of absorption of emf by water. There's a gap right that dips in the 500 nm range
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Gabor Csardi @gaborcsardi.org · 14/09/2026
New beta of #Rstats rig: LOTS of EXCITING stuff: - new: web site: rig.r-lib.org - new: user-mode R installation: rig.r-lib.org/admin-vs-use... - new: manage R packages (CRAN + git): rig.r-lib.org/pkg-guide.html - new: manage R projects and virtual environments: rig.r-lib.org/proj-guide.h...
rig.r-lib.org
rig – the R Installation Manager – rig
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Gavin Buckingham @drgbuckingham.bsky.social · 13/09/2026
Pictorial cues to depth create a nice effect on this cabbage (found of Facebook)
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Kevin M. Kruse @kevinmkruse.bsky.social · 02/09/2026
Students who nod and smile during lecture when we try to make a point? Heroes
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Niki Hubbard, PhD 🐙🦀 @nikihubbard.bsky.social · 30/03/2026
Once upon a time I just admired nudis and sea slugs. But it was not enough. Now apparently I'm creating an R package to celebrate their colour palettes? 😅 First up, my Sydney fave, Hypselodoris bennetti. #rstats #nudibranch #dataviz 🦑🐙🧪 #marinelife #invertebrates
Close up with a beautiful nudibranch on a rocky reef. The lower half of the image is a palette of swatches made from the nudi's vibrant colours.
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Thomas Lin Pedersen @thomasp85.com · 17/08/2026
Cut-outs from my posit::conf presentation
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Maria Meier @mariame.bsky.social · 06/07/2026
Am Wochenende hat das @dgps.bsky.social Projekt zur Einheit und Vielfalt der Psychologie in Berlin getagt - es war eine tolle und intensive Zeit im Haus der Psychologie, mit Besuch der Geschäftsstelle und vielen neuen Ideen und Aha Momenten. Bin gespannt, was uns im Herbst in Göttingen erwartet!
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Jan Philippe de Haan @janpdehaan.bsky.social · 06/07/2026
Spent the weekend in Berlin locked into some incredible, active debates with the #DGPs young members project, followed by good food and even better company. A truly rich community that I am glad to be a part of! @dgps.bsky.social @mfjsperl.bsky.social @evagorbanenko.bsky.social
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Nature Portfolio @natureportfolio.nature.com · 06/07/2026
Great apes may have been laughing with a similar rhythm to modern humans for at least 15 million years, suggests a study in Communications Biology. The findings also suggest that laughter has become faster, more variable, and increasingly influenced by the situation it occurs in. #evosky 🌎🧪
go.nature.com
Rhythm and timing in laughter reveal that human vocal plasticity falls on a hominid continuum - Communications Biology
Comparative analysis of laughter rhythm across all extant great apes reveals that isochrony is ancestral to hominids, with tempo, variability, and context-sensitivity increasing progressively toward humans, tracing a continuum of vocal plasticity.
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Ryan Moulton @moultano.bsky.social · 19/06/2026
I spent the last month obsessed with finding colors that can't be displayed on a conventional screen. This is what I found. moultano.wordpress.com/2026/06/19/w...
moultano.wordpress.com
Where to Find the Colors Your Screen Can’t Show You
An atlas of the vibrance of the real world
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Akiyoshi Kitaoka @akiyoshikitaoka.bsky.social · 30/06/2026
Chromostereopsis and stereo kinetic effect
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Institute of Art and Ideas @iai.tv · 18/06/2026
A recent study claimed that because we have similar structures of colour experience, these similar structures point to us all seeing the same colours. | bit.ly/4eTUwm7 Philosopher Keith Allen disagrees; even one instance of difference in a structure changes the relationships throughout it.
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Konsta Happonen @konsta.happonen.eu · 08/06/2026
DEH-plür. Because why not. #rstats
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Science Magazine @science.org · 28/05/2026
Researchers have identified superparamagnetic macrophages in the livers of rock pigeons to be crucial for magnetic sensing. The finding uncovers an unexpected role for immune cells in sensory perception and may fundamentally change our understanding of animal navigation. scim.ag/4nTQ3nq
How animals sense Earth’s magnetic field is one of biology’s enduring mysteries. Researchers have now identified superparamagnetic macrophages in the livers of rock pigeons (Columba livia) to be crucial for magnetic sensing. The finding uncovers an unexpected role for immune cells in sensory perception and may fundamentally change our understanding of animal navigation.

Photo: Andreas Teichmann/laif/Redux
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Jeremy Allen @jeremy-data.bsky.social · 09/05/2026
I'm checking out the new packages pane in our #Positron IDE. Python or #RStats. The little blue arrows mean package updates are available. Search, sort, install, update, remove, and filter by category. More cool metadata coming in a future release.
Positron IDE showing bird_card.R open in the editor, with library calls for ebird, mggick, and ggplot2. A purple arrow annotation points to the Packages pane on the left, which lists installed R packages. The terminal panel at the bottom shows the script being sourced with dplyr attaching.
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Marius 't Hart @thartbm.bsky.social · 21/04/2026
And here's a movie of what the task looks like:
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Michael Friendly @datavisfriendly.bsky.social · 20/04/2026
#TodayinHistory #dataviz #OTD 📊 🎂Apr 19, 1801 Gustav Theodor Fechner born in Groß Särchen, Germany 🇩🇪 Oct 22, 1850: Fechner's Law: the subjective sensation is proportional to the log of stimulus intensity -- used as an early idea for accuracy of graphic elements -- length, angle, area,..
Portrait of Gustav Theodor FechnerGraphic illustration of Fechner's Law. It plots intensity, I, of a stimulus on the horizontal axis vs. the strength S of the sensation on the vertical. The curve shows Fechner's Law, S = k log I
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laurentfranckx.bsky.social @laurentfranckx.bsky.social · 09/04/2026
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John Russell @drjohnrussell.com · 05/04/2026
#30DayChartChallenge Day 5 - experimental I have always loved Florence Nightingale's rose diagram, doubly so since reading @infowetrust.com 's book. This diagram shows all ranked games within each category of @boardgamegeek.com, as well as top 500 & 100. Done in #rstats: github.com/drjohnrussel...
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Pascal Mamassian @mamassian.bsky.social · 16/03/2026
Congratulations to Ian Thornton and colleagues who published their Mainz-Linez illusion in i-Perception (@pec-ipe.bsky.social): the red dots appears to wave left and right when one looks at one of the black dots, but they actually move straight journals.sagepub.com/doi/10.1177/...
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Fabricio Nicola @fabricionicola.bsky.social · 14/03/2026
Mammals have hundreds of joints and muscles. Controlling them individually would be nearly impossible. How does the nervous system organize such complexity into coherent actions? Our new study explores this question through a natural behavior: jumping.
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New Scientist @newscientist.com · 09/03/2026
Neuron-powered computer chips can now be easily programmed to play a first-person shooter game, bringing biological computers a step closer to useful applications
newscientist.com
Human brain cells on a chip learned to play Doom in a week
Neuron-powered computer chips can now be easily programmed to play a first-person shooter game, bringing biological computers a step closer to useful applications
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Soziopolis @soziopolis.bsky.social · 08/03/2026
Die Soziologie wurde schon in ihrer Frühphase maßgeblich von innovativen Wissenschaftlerinnen geprägt. Hier geht es zu den Porträts von Dorothy Edith Smith, Uta Gerhardt, Anna Julia Cooper, Herta Herzog, Jane Addams, Viola Klein und Florence Nightingale: www.soziopolis.de/dossier/die-...
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IPMB @ipmb-tubs.bsky.social · 05/03/2026
Short trip to the world's largest computer museum! 🖥️✨ Our department visited the HNF. We covered everything from clay tablets to quantum computing. Thanks to @karolinem.bsky.social for organizing! 👏 Our heads are spinning with ideas on where to explore next.💡 #HNF #ComputerHistory
IPMB in morsecode
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Dr. Matthias F. J. Sperl @mfjsperl.bsky.social · 24/02/2026
🧠 Mit dem @dgps.bsky.social JuMi-Projekt durften wir zu Gast an der @unileipzig.bsky.social sein. 🤩 Highlights: Führung durch den Wundt-Raum mit Erich Schröger & Austausch mit Cornelia Exner. 🤩 DANKE an @evalottabrakemeier.bsky.social und an @lubaumgaertner.bsky.social für den wunderbaren Empfang! 😊
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Peter Gray @pgdataviz.bsky.social · 23/02/2026
Me? I'm just happy to be here #rstats
Everyone fighing over TIbble versus DF 

>| vs %>%

Me: googling what mean means
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IPMB @ipmb-tubs.bsky.social · 23/02/2026
Today was the last exam for our first semester students 😉 and this is what they got. Thanks for a great teaching experience!
A button with the IPMB logo and „I survived the first semester!“
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Kevin Mitchell @wiringthebrain.bsky.social · 21/02/2026
The strongest version of this illusion I’ve seen! Absolute head-wrecker!
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Wendel van der Sluis @wendelvandersluis.bsky.social · 20/02/2026
2026 starts with curiosity! 🌍🐾 The first #Behaviour issue is now live: from cooperative fish and dog “smiles” 🐶 to humans in urban spaces 🏙️ – diverse species, methods & shared insights. Explore the full issue: brill.com/view/journal...
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Jan Philippe de Haan @janpdehaan.bsky.social · 20/02/2026
Arrived in Leipzig with @evagorbanenko.bsky.social 😌 Looking forward to the second meeting of the #DGPs young members project today!☀️
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Jan Philippe de Haan @janpdehaan.bsky.social · 18/02/2026
Still my favourite book for a conceptual understanding of the formal principles behind multivariate models! Great for students without extensive mathematical training (e.g. psychology majors). 📐 "The Geometry of Multivariate Statistics" by Thomas D. Wickens www.taylorfrancis.com/books/mono/1...
taylorfrancis.com
The Geometry of Multivariate Statistics | Thomas D. Wickens | Taylor &
A traditional approach to developing multivariate statistical theory is algebraic. Sets of observations are represented by matrices, linear combinations are
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Alex Rieger @alexr2.bsky.social · 18/02/2026
Happy about our new paper with Anna Pöker, @janpdehaan.bsky.social and @frankeggert.bsky.social Applying a mathematical model from behavioural ecology to an interesting field context. 🐦 Open Access available at Behaviour: brill.com/view/journal... @ipmb-tubs.bsky.social
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Wendel van der Sluis @wendelvandersluis.bsky.social · 18/02/2026
👀 Humans scan their environment in everyday life – but how much does context matter? A study observed 45 people in three urban spots: library, study house and refectory. Scanning was highest in the refectory, lowest in the library. @janpdehaan.bsky.social @frankeggert.bsky.social
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Quanta Magazine @quantamagazine.org · 09/02/2026
“A bird with a 10-gram brain is doing pretty much the same as a chimp with a 400-gram brain,” said Onur Güntürkün, who studies brain structures at Ruhr University Bochum in Germany. “How is it possible?”
quantamagazine.org
Intelligence Evolved at Least Twice in Vertebrate Animals | Quanta Magazine
Complex neural circuits likely arose independently in birds and mammals, suggesting that vertebrates evolved intelligence multiple times.
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Michael Friendly @datavisfriendly.bsky.social · 26/01/2026
#dataviz #psychology Word Faces of Psychology -- one of the best uses of word clouds I've ever seen. Three lovely word clouds of pioneers of psychology using words from their major works. Chris Green (2018) Images of the disciplining of psychology, 1890–1940, DOI: 10.1080/14780887.2018.1429851
Word cloud constructed from the work of William James: _Principles of Psychology_ (1890)Word cloud constructed from the work of Sigmund Freud: _New Lectures on Psychoanalysis_ (1933)Word cloud constructed from the work of B. F.: _Behaviours of Organisms_ (1938)
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New Scientist @newscientist.com · 26/01/2026
The light-sensitive tissue of birds’ eyes is not supplied with oxygen by blood vessels – instead, it powers itself with a flood of sugar, and this may have evolutionary benefits
newscientist.com
Bird retinas work without oxygen, and now scientists know how
The light-sensitive tissue of birds’ eyes is not supplied with oxygen by blood vessels – instead, it powers itself with a flood of sugar, and this may have evolutionary benefits
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Libby Heeren @libbyheeren.bsky.social · 10/01/2026
This is the most elite change in #Positron, it's so calming. #rstats #python #databs
Side by side views of the Positron. The left side has the activity bar on the left in the default position. The right side has the activity bar in the top position.Screenshot of the Positron IDE showing that the Activity Bar moved from the default position on the left side to the top where it's much smaller. A right-click menu is open next to the “Explorer” label, with the option Activity Bar Position → Top selected. Annotations highlight where to right-click, next to the word Explorer, then choose Activity Bar Position, and then choose Top.
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Richard McElreath 🐈‍⬛ @rmcelreath.bsky.social · 09/12/2025
I'm teaching Statistical Rethinking again starting Jan 2026. This time with live lectures, divided into Beginner and Experienced sections. Will be a lot more work for me, but I hope much better for students. I will record lectures & all will be found at this link: github.com/rmcelreath/s...
course schedule as a table. Available at the link in the post.
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Jan Philippe de Haan @janpdehaan.bsky.social · 05/12/2025
dreamrs.github.io/esquisse/ that sounds interesting for introductory methods courses!
dreamrs.github.io
Explore and Visualize Your Data Interactively
A shiny gadget to create ggplot2 figures interactively with drag-and-drop to map your variables to different aesthetics. You can quickly visualize your data accordingly to their type, export in variou...
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Science News @scinews.bsky.social · 20/11/2025
Handwritten notes are more useful for studying and committing to memory than typed notes, ultimately contributing to higher achievement for college students. link.springer.com/article/10.1...
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Dr. Matthias F. J. Sperl @mfjsperl.bsky.social · 15/11/2025
😍 Es war ein fulminanter Start in das Jungmitgliederprojekt zur Einheit und Vielfalt der Psychologie der @dgps.bsky.social in Würzburg, mit @evalottabrakemeier.bsky.social! 😍 Prof. Armin Stock führte uns durch das beeindruckende Zentrum für Geschichte der Psychologie an der @uni-wuerzburg.de🤩😊⬇️🧠.
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Jan Philippe de Haan @janpdehaan.bsky.social · 10/11/2025
The first meeting of the #DGPs young members project on the unity and diversity of psychology in Würzburg was a resounding success! 🎉 I am happy to have met so many inspiring scientists, including our young members' representative @mfjsperl.bsky.social who organised this wonderful event.
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Pawel Burkhardt @pawelburkhardt.bsky.social · 27/10/2025
First neurons didn’t appear overnight. We trace their roots to ancient secretory cells - showing how lifestyle & behavior shaped the evolution of first synapses.🧠🌊 #Evolution #Neuroscience Our latest in @natrevneuro.nature.com Link: rdcu.be/eMX3E @jeffcolgren.bsky.social @msarscentre.bsky.social
rdcu.be
The evolutionary origins of synaptic proteins and their changing roles in different organisms across evolution
Nature Reviews Neuroscience - Recent studies have shed further light on the evolutionary origins of chemical synapses, In this Review, Colgren and Burkhardt explore how ancient proteins were...
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Kelsey Tyssowski @kelseytea.bsky.social · 22/10/2025
🧠🌟🐭 Excited to share some of my postdoc work on the evolution of dexterity! We compared deer mice evolved in forest vs prairie habitats. We found that forest mice have: (1) more corticospinal neurons (CSNs) (2) better hand dexterity (3) more dexterous climbing, which is linked to CSN number🧵
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Jan Philippe de Haan @janpdehaan.bsky.social · 22/10/2025
Happy Fechner Day! #psychophysics
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Nicole Holzhauser @nicholzhauser.bsky.social · 14/10/2025
Aktuell auf @soziopolis.bsky.social: Echte Gleichstellung: faire Arbeitsbedingungen, unbefristete Stellen, geteilte Verantwortung & gerechtere Strukturen für alle. Familienfreundlichkeit & Work-Life-Balance als Gegenentwurf zu grenzenloser Verfügbarkeit. www.soziopolis.de/dossier/wiss...
soziopolis.de
Wissenschaftlerinnen
Zur Situation von Frauen in Academia
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Jan Philippe de Haan @janpdehaan.bsky.social · 02/10/2025
I had a great time at #FGME25 this week! A huge thank you to all organisers from Berlin. I met a lot of interesting people and the keynote of @bringmannlaura.bsky.social was truly inspiring! And: @alexr2.bsky.social and I presented some recent work with Anna Pöker and @frankeggert.bsky.social.
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Eline Van Geert @elinevg.bsky.social · 23/09/2025
Here some other beautiful submissions! Thanks everyone for participating (including @janpdehaan.bsky.social)! For more info on OCTA and QIP: ℹ️https://elinevg.github.io/OCTA/ ℹ️https://aesthetics-toolbox.streamlit.app/ @gestaltrevision.bsky.social
Submission by Jan (balance score: 20.43)Submission by Sören (balance score: 26.05)Submission by JW (balance score: 18.28)Submission by Tessa (balance score: 23.37)
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