iiinova — where your digital self keeps evolving

Reposted by Nuno De Sá Teixeira

Tom Wallis @tsawallis.bsky.social · 13/10/2026

What object or item is depicted in this image?

An ambiguous two-tone image made of regions of black and white patches.

Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 13/10/2026

The fourth one, in particular, touches on the use of AI in higher education - some students resourt to ChatGPT, which seemingly prefers to spew code. Often, a simple experiment turns into several lines of code that still don't work as intended (my students don't know enough python to correct it).

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 12/10/2026

After years of trying to teach PsychoPy to graduate students and seeing the same mistakes being made over and over, I decided to write a few commandments. Feel free to suggest some more (biblical style is optional).

1. Thou shalt plan thy experiment before opening PsychoPy
2. Thou shalt not name two things by the same name
3. Thou shalt keep together in one routine that which belongs together
4. Thou shalt not write custom code where Builder sufficeth

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 11/09/2026

Many of us take for granted the ability to see stereograms with cross-eyed and/or parallel viewing, but some students struggle with it. I’ve therefore wrote this comprehensive guide, from the basics to autostereograms. Feedback and corrections are very welcome! www.kymograph.pt/en/teaching/...

kymograph.pt

How to see 3D images without any equipment (apart from your eyes) – From simple stereograms to autostereograms | Kymograph

Person website of Nuno De Sá Teixeira — research, teaching, and resources on perception, psychophysics, and experimental psychology.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/08/2026

A handy, interactive demonstration of the Müller-Lyer illusion, made from card. I keep this one around, as it has proven useful for a few topics in my classes. You can find the print-ready file to build your own on my website, here: www.kymograph.pt/en/teaching/....

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 30/03/2026

Got 41.83/50. Funny how I almost always choose a brighter colour than the target one.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 28/03/2026

Dear face perception folks - I 3D printed some greebles (so far just the Samar family) mostly because I could. Now I’m wondering: these might actually be useful as teaching tools or even for experiments. Any ideas for cool/fun/clever things to do with physical greebles? #FacePerception

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 24/02/2026

I found this under the sofa. It’s been 24 hours, and everyone here is fine. One of the cats is acting a little strange, though - most likely due to something it ate. Nothing to worry about.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 21/02/2026

If I remember correctly, this one has a great chapter discussing Libet's experiment, right?

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 18/02/2026

Perfect for a perception scientist with a taste for Hamlet, or an unapologetic Holbein enthusiast. (3D Model found here: www.printables.com/model/616483...)

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 18/02/2026

Better start stocking those pink crayons now - every Blue Period eventually ends...

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 17/02/2026

I usually cover it in classes devoted to attention, immediately followed by a critical discussion based on Daniel Algom's papers (specially 10.3758/bf03211844), setting the stage to introduce Garner's task as a superior alternative. But yes, I can see its fit on a unit on cognitive control.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 16/02/2026

For anyone who can’t quite make out the “teeth,” this image might help. I added two eyes and a black outline to better separate the teeth from the mouth. Basically, it looks like the kind of smile you’d end up with after messing with Batman :P

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 05/02/2026

If books were people, I’d introduce these two to each other. I’m sure they’d get along perfectly; and I enjoyed spending time with both.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 05/02/2026

I’ve largely removed autostereograms from my perception classes over the years (one token example still remains just to acknowledge its existence), so I’m genuinely excited to try your hack this semester. Thanks for the excellent tutorial!

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 16/01/2026

It took just over 24 hours to print, and I had to use whatever colours I had available, but it could be helpful for hands-on students. The 3D model can be found here: www.printables.com/model/207798...

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Reposted by Nuno De Sá Teixeira

Cody @codyjohnston.bsky.social · 03/10/2025

New episode about the thing that happened, the reaction to it, and the reaction to the reaction to the thing that happened. youtu.be/nD3rSA4FSqk?...

youtu.be

... Can We Talk? - SOME MORE NEWS

YouTube video by Some More News

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 17/09/2025

A new addition to my personal library, thanks to Bluesky's #visionscience community (even if in the sequence of a sad new).

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 28/08/2025

Thank you all for the great feedback and insightful questions on my poster "Exploring Action-Specific Effects: A Representational Momentum Study of the ‘Pong Effect’" at #ECVP2025. It was a wonderful conference and I am already looking forward to the next one!

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 26/08/2025

Shout-out to Rodrigo Freita's presentation of our work "Dynamic events as a natural cause for the Onset Repulsion Effect" at #ECVP2025. We had a great feedback and fruitful discussions.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 28/07/2025

It's taking me forever to read this book because my brain insists in emulating Bernie's distinctive voice tone...

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 07/07/2025

I find it particularly funny how it always seems to be in a rush to plot stuff and you have to keep telling it to "hold on" XD

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Reposted by Nuno De Sá Teixeira

Cody @codyjohnston.bsky.social · 02/07/2025

Here's our new episode about that guy trying to talk. Alternate title is "The Right-Wing War On Words", but we couldn't resist. youtu.be/1yjIeZCddUQ?...

youtu.be

LOL Jordan Peterson - SOME MORE NEWS

YouTube video by Some More News

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 06/06/2025

Yesterday was our "Illusion Day", with interactive demonstrations of classic perceptual illusions made by my students of Attention&Perception. It was the first time I attempted this activity with a class and it was definitely a success! Will repeat it next year! (more illusions in the comments)

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/04/2025

It is my conviction that the time required for a Matlab script to finish is directly proportional to its understandability (or, stated differently, the most efficient scripts are necessarily more obscure and harder to understand)

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 13/04/2025

This is the output of my modest Matlab implementation of Marr&Poggio's cooperative algorithm for stereo disparity. With less than 100 lines of code, it is not efficient, the parameters need to be tweaked for each simulation and only works in Flatland, but it makes the core ideas clear for students.

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 11/04/2025

Trumps' administration rescinded a program with Portuguese Universities (including the one where I work) along with a questionnaire on ideological issues (women's rights, equity, inclusion, global warming, etc), hinting that continuation of the program hinges on giving the "right" answers... 😡

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 20/03/2025

Well, I "stole" two coloured balls from my toddler to use as part of one experiment we're about to run...

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 19/03/2025

When your father is a vision scientist and has a knack for building classroom perception demonstrations...

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/03/2025

Also, the pinhole must be really tiny, otherwise it really doesn't work unless the person looks at it the right way... Other than that, it's just a box divided into two sections - the farthest one with no ceiling (to allow the light inside)

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/03/2025

@bjbalas.bsky.social , thank you! :) To be honest, this was just a first attempt, with lots of improvising as I went along. I learned that it is much easier to make the pinhole first and glue the bits of paper afterward (while peeking through the hole).

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/03/2025

In preparation for my Perception class this next week, on lightness and colour constancy, I made a cardboard model of the 1977 Gilchrist's experiment. Left - the opened box, with equal illumination Right - view through the pinhole (the white target now seems black) #VisionScience

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 01/03/2025

Was about to say that, at least, every sane person would have a 1/3 chance of guessing correctly - but yeah, we all know which of those 3 you're talking about.

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Reposted by Nuno De Sá Teixeira

megan peters 🧠 @meganakpeters.bsky.social · 01/03/2025

me too.

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Reposted by Nuno De Sá Teixeira

Zez Vaz @zezvaz.bsky.social · 14/02/2025

‘Cybertruck Man’ a cartoon in defiance of Musk #political #cartoonist #cybertruck #elon #musk #democracy #tiananmen

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Reposted by Nuno De Sá Teixeira

Ashley Kuckelman @ashleyvotesblue.bsky.social · 04/02/2025

Trump’s a great deal-maker. 😭☠️😭

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Reposted by Nuno De Sá Teixeira

Andy Scollick @andyscollick.bsky.social · 04/02/2025

This should alarm everyone, not just scientists. The U.S. National Science Foundation (NSF), "an independent federal agency that supports science and engineering in all 50 states and U.S. territories", is collaborating with the subversion of American freedom and overthrow of democracy.

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Reposted by Nuno De Sá Teixeira

Icelandic Vision Lab @icevislab.bsky.social · 23/01/2025

The U.S. anti-science movement is going forward full force. Withdrawal from the Paris Agreement, an anti-vaxxer as Secretary of Health, and now this?

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 21/01/2025

Here's some old news, for those who are surprised with that gesture

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 16/01/2025

Based on my previous papers, the word 'the' is ~7% of my manuscripts; the word 'of' ~5% and the word 'and' ~4%. The words 'in', 'to', 'for' and 'with' add up to ~8%. Thus, 24% of my next manuscript is already written, without even opening the text editor! What a productive morning! 😅

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 15/01/2025

On the delicate balance between professor and gamer...

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Nuno De Sá Teixeira @nunodesateixeira.bsky.social · 13/01/2025

My experience is that AI is OK at generating a very preliminary draft for parts of code (which still needs to be critically assessed) or at simplifying code (but this might be my fault, as my code is seldom parsimonious). So, yes, learning to program should definitely be incentivized.

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