Andre Sahakian
andresahakian.bsky.social
Andre Sahakian
@andresahakian.bsky.social
PhD candidate at Utrecht University |
Interested in working memory, decision making, bayesian stats, online experiments, open science | AttentionLab & CAP-Lab
Pinned
About time our latest project about time got out!

How do self-paced encoding and retention relate to performance in (working) memory-guided actions?

Find out now in Memory and Cognition: doi.org/10.3758/s134...
(or check the short version below)🧵
The rise and fall of memories: Temporal dynamics of visual working memory - Memory & Cognition
Visual working memory (VWM) is a cognitive system, which temporarily stores task-relevant visual information to enable interactions with the environment. In everyday VWM use, we typically decide how l...
doi.org
Reposted by Andre Sahakian
Spatial attention and working memory are popularly thought to be tightly coupled. Yet, distinct neural activity tracks attentional breadth and WM load.

In a new paper @jocn.bsky.social, we show that pupil size independently tracks breadth and load.

doi.org/10.1162/JOCN...
October 14, 2025 at 2:04 PM
Reposted by Andre Sahakian
Now published in Attention, Perception & Psychophysics @psychonomicsociety.bsky.social

Open Access link: doi.org/10.3758/s134...
June 12, 2025 at 7:21 AM
Long overdue! Didn't promote this one amid twitter/X chaos. But nearing the end of my PhD, I want to do this project justice and post it here:

Is visual working memory used differently when errors are penalized?

Out already 1+ year ago in JEP:LMC: research-portal.uu.nl/ws/files/258...
🧵 (1/3)
a soccer player with the number 10 on his jersey is being shown a red card
ALT: a soccer player with the number 10 on his jersey is being shown a red card
media.tenor.com
May 29, 2025 at 7:49 AM
Reposted by Andre Sahakian
Good morning #VSS2025, if you care for a chat about the role of attention in binding object features (during perceptual encoding and memory maintenance), drop by my poster now (8:30-12:30) in the pavilion (422). Hope to see you there!
May 19, 2025 at 12:36 PM
Reposted by Andre Sahakian
If you are at #VSS2025, come to @chrispaffen.bsky.social talk (room 2 at 3PM), where he discusses how binocular conflict in real-world vision may be resolved in an adaptive manner (favoring either nasal or temporal hemi-fields) to optimally perceive partially occluded objects of interest.
May 18, 2025 at 4:12 PM
Reposted by Andre Sahakian
Attending @vssmtg.bsky.social? Come check out my talk on EEG decoding of preparatory overt and covert attention!

Tomorrow in the Attention: Neural Mechanisms session at 17:15. You can check out the preprint in the meantime:
Preparing overt eye movements and directing covert attention are neurally coupled. Yet, this coupling breaks down at the single-cell level. What about populations of neurons?

We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
May 17, 2025 at 6:06 PM
Reposted by Andre Sahakian
We previously showed that affordable eye movements are preferred over costly ones. What happens when salience comes into play?

In our new paper, we show that even when salience attracts gaze, costs remain a driver of saccade selection.

OA paper here:
doi.org/10.3758/s134...
May 16, 2025 at 1:36 PM
About time our latest project about time got out!

How do self-paced encoding and retention relate to performance in (working) memory-guided actions?

Find out now in Memory and Cognition: doi.org/10.3758/s134...
(or check the short version below)🧵
The rise and fall of memories: Temporal dynamics of visual working memory - Memory & Cognition
Visual working memory (VWM) is a cognitive system, which temporarily stores task-relevant visual information to enable interactions with the environment. In everyday VWM use, we typically decide how l...
doi.org
May 15, 2025 at 9:56 AM
Reposted by Andre Sahakian
Preparing overt eye movements and directing covert attention are neurally coupled. Yet, this coupling breaks down at the single-cell level. What about populations of neurons?

We show: EEG decoding dissociates preparatory overt from covert attention at the population level:
doi.org/10.1101/2025...
May 13, 2025 at 7:51 AM
Reposted by Andre Sahakian
Thrilled to share that, as of May 1st, I have started as a postdoc at The University of Manchester!

I will investigate looked-but-failed-to-see (LBFTS) errors in visual search, under the expert guidance of Johan Hulleman and Jeremy Wolfe. Watch this space!
May 7, 2025 at 12:37 PM
Reposted by Andre Sahakian
We show that eye-movements are selected based on effort minimization - finally final in @elife.bsky.social
eLife's digest:
elifesciences.org/digests/9776...
& the 'convincing & important' paper:
elifesciences.org/articles/97760

I consider this my coolest ever project!

#VisionScience #Neuroscience
A move you can afford
Where a person will look next can be predicted based on how much it costs the brain to move the eyes in that direction.
elifesciences.org
April 7, 2025 at 7:28 PM
Reposted by Andre Sahakian
Last Friday the irreplaceable @luzixu.bsky.social successfully defended her PhD (at @utrechtuniversity.bsky.social). This has been an incredibly productive 3+ years, and we are sad to see her leave, but are very proud of her accomplishments (with @attentionlab.bsky.social, @chrispaffen.bsky.social)!
March 17, 2025 at 3:05 PM