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Posts by Jan Philippe de Haan

Video

And here's a movie of what the task looks like:

1 day ago 1 1 0 0
Portrait of Gustav Theodor Fechner

Portrait of Gustav Theodor Fechner

Graphic 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

Graphic 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

#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,..

2 days ago 5 2 1 1
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1 week ago 10 3 1 0
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#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...

2 weeks ago 10 3 0 0
Video

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/...

1 month ago 84 29 3 2
Video

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.

1 month ago 75 15 4 2
Preview
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

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

1 month ago 3 2 0 1
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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-...

1 month ago 14 6 0 0
IPMB in morsecode

IPMB in morsecode

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

1 month ago 5 4 0 0
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🧠 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! 😊

1 month ago 7 3 0 0
Everyone fighing over TIbble versus DF 

>| vs %>%

Me: googling what mean means

Everyone fighing over TIbble versus DF >| vs %>% Me: googling what mean means

Me? I'm just happy to be here #rstats

1 month ago 129 23 3 1
A button with the IPMB logo and „I survived the first semester!“

A button with the IPMB logo and „I survived the first semester!“

Today was the last exam for our first semester students 😉 and this is what they got. Thanks for a great teaching experience!

1 month ago 3 2 0 0
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The strongest version of this illusion I’ve seen! Absolute head-wrecker!

2 months ago 390 123 25 29
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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...

2 months ago 4 4 1 0
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Arrived in Leipzig with @evagorbanenko.bsky.social 😌 Looking forward to the second meeting of the #DGPs young members project today!☀️

2 months ago 6 1 0 0
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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

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...

2 months ago 2 3 0 0

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

2 months ago 4 3 0 0
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👀 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

2 months ago 4 1 1 0
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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.

“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?”

2 months ago 68 29 0 1
Word cloud constructed from the work of William James: _Principles of Psychology_ (1890)

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 Sigmund Freud: _New Lectures on Psychoanalysis_ (1933)

Word cloud constructed from the work of B. F.: _Behaviours of Organisms_ (1938)

Word cloud constructed from the work of B. F.: _Behaviours of Organisms_ (1938)

#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

2 months ago 7 1 0 0
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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

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

2 months ago 13 3 0 0
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.

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.

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.

This is the most elite change in #Positron, it's so calming.

#rstats #python #databs

3 months ago 108 11 14 4
course schedule as a table. Available at the link in the post.

course schedule as a table. Available at the link in the post.

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...

4 months ago 662 235 12 20
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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...

dreamrs.github.io/esquisse/ that sounds interesting for introductory methods courses!

4 months ago 0 1 0 0
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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...

5 months ago 34 14 2 2
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😍 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🤩😊⬇️🧠.

5 months ago 16 4 1 0
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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.

5 months ago 6 1 0 1
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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...

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

5 months ago 353 138 4 8
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