A bit of bricolage and shadow play.
11.03.2026 14:24
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A bit of bricolage and shadow play.
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.
If I remember correctly, this one has a great chapter discussing Libet's experiment, right?
Perfect for a perception scientist with a taste for Hamlet, or an unapologetic Holbein enthusiast.
(3D Model found here: www.printables.com/model/616483...)
Better start stocking those pink crayons now - every Blue Period eventually ends...
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.
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
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.
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!
3D model of a human brain
3D model of a human brain
3D model of a human brain
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...
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?...
A new addition to my personal library, thanks to Bluesky's #visionscience community (even if in the sequence of a sad new).
So, basically - and for those who didn't know it - yes, trans people exist and they are like anyone else: they love, they smile and cry, they care for their loved ones, they collaborate with authorities, and (importantly) they DID NOT incite violence. Can media stop talking about trans now?
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!
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.
It's taking me forever to read this book because my brain insists in emulating Bernie's distinctive voice tone...
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
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?...
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)
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)
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.
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... 😡
😅
Well, I "stole" two coloured balls from my toddler to use as part of one experiment we're about to run...
When your father is a vision scientist and has a knack for building classroom perception demonstrations...
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)
@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).
