Benedikt Ehinger

@benediktehinger.bsky.social

Comp-#CogSci TT-Prof - follow.me @ @benediktehinger@scholar.social 🧠, #vision, #eyetracking, #cognition, VR/mobile #EEG, methods, design (www.thesis-art.de), teaching & supervising our lab mainly develops in #julialang

Clinical 7T gradients can go fast — but peripheral nerve stimulation (PNS) stops you at high-res fMRI. ⚡ Meet POPE 🌍: we reshape EPI pulses to dodge PNS exactly when it spikes → robust 0.3mm fMRI, seeing intracortical veins. 🧠 w/ @SiemensHealth 👉 doi.org/10.64898/202...

New preprint! What the eyes do when searching for a visual target reveals the psychological similarity between objects, just like more classic (but much longer & tedious) tasks like triplet odd-one-out and direct comparison. www.biorxiv.org/cgi/content/... #BRAINFLOW @upcite.bsky.social @cnrs.fr

Eye movements reveal representational geometry

Mental representations are the explanatory construct of the cognitive sciences, but there is no widely accepted characterization of how they cause behavior. Visual representational geometry can be quantified by similarity scores, but almost all methods require an explicit judgment. To examine how representations cause behavior by varying task demands, observers must perform different tasks while continuously reporting similarity, leading to dual-task interference. This study develops scanpaths as an implicit similarity measure, and uses representational similarity analysis to validate it. Observers searched for a target; fixations on distractors may reveal similarity. Similarity was also quantified by an odd-one-out task in the same participants, and ratings from different participants (Jiang et al. 2022). Representational geometries between tasks correlated. A generative model predicted first fixations in novel data. This double validation of the scanpath method opens the door to examining the causality of representations by determining if and how they vary with task demands. ### Competing Interest Statement The authors have declared no competing interest.

biorxiv.org

Meet SpudCell, a synthetic cell made from lifeless ingredients that feeds, grows, divides, and experiences selection. If it doesn't have all the hallmarks of life, it has a lot! Here's my story. Gift link: nyti.ms/4vCbTih

A series of images of a dividing synthetic cell

I'm proud to say we are releasing LAION-fMRI, a densely sampled 7T fMRI dataset of natural images, with very broad stimulus sampling for testing countless hypotheses and for deeply exploring brain representations. The dataset is now available at laion-fmri.hebartlab.com What does LAION-fMRI offer? 🧵

LAION-fMRI - a 7T fMRI dataset of human vision

LAION-fMRI (LfMRI / LAION MRI dataset): 5 subjects, 25,052 launch-release natural images, 165 acquired 7T fMRI sessions with single-trial GLMsingle betas, retinotopy, localizers, and diffusion.

laion-fmri.hebartlab.com

Since Vogel & Machizawa’s Nature (2004) paper, the classic claim has had two parts: a. CDA amplitude increases as people hold more items in mind up to a certain limit - ~4 items. And b) the size of that CDA increase predicts who has higher visual working memory capacity. doi.org/10.1038/natu...

Neural activity predicts individual differences in visual working memory capacity - Nature

Nature - Neural activity predicts individual differences in visual working memory capacity

doi.org

Excited about our new preprint: “The illusory simplicity of the feedforward pass: evidence for the dynamical nature of stimulus encoding along the primate ventral stream” arxiv.org/abs/2604.12825 Work with Sushrut Thorat, Anna Mitola, Paolo Papale, Peter König & Tim Kietzmann 🧵 thread below

The illusory simplicity of the feedforward pass: evidence for the dynamical nature of stimulus encoding along the primate ventral stream

In studying primate vision, a large body of work focuses on the first feedforward sweep. During this initial time window, information is thought to pass through ventral stream regions in a stage-like ...

arxiv.org

Imagining philosophical zombies does not reveal an explanatory gap. It only shows imagination not possibility. Imaging airplanes flying backward reveals no deep mystery about aerodynamics. There Is No ‘Hard Problem Of Consciousness’ www.noemamag.com/there-is-no-... #neuroscience

There Is No ‘Hard Problem Of Consciousness’ | NOEMA

Consciousness is not separate from the physical world — our “soul” is of the same nature as our body and any other phenomenon of the world.

noemamag.com

I think one can only urge people to interview current and former trainees before committing to a new position. I don't think one even considers what challenges can arise as a person starting out in science & why this is useful. if a PI declines to establish contacts here, it's def a bad sign.