Olaf Dimigen

Olaf Dimigen

@olaf.dimigen.de

Trying to understand how the brain makes sense of the world with (and despite) eye movements. Active visual cognition, Combined eye-tracking/EEG, EEG methods. Toolboxes: EYE-EEG, opticat, UNFOLD. Previously @Berlin. Tenured Asst. professor @Groningen

653 followers724 following19 posts

Olaf Dimigen reposted

Sebastiaan Mathôt
@cogsci.nl

Replying to @cogsci.nl

And finally I will talk about a large group project in which we show that pupil-size changes alone (independently of external stimuli) trigger retinal responses. dx.doi.org/10.1111/psyp... with @olaf.dimigen.de @hakankarsilar.bsky.social @anavili.bsky.social @veerahelmisofia.bsky.social

dx.doi.org<em>Psychophysiology</em> | SPR Journal | Wiley Online LibraryWe report a previously unknown response in the human retina and visual cortex that is locked to pupil constriction and likely reflects a retinal response to a sudden decrease in retinal light exposur...
Olaf Dimigen
@olaf.dimigen.de

Our detailed tests of high-speed OLED monitors for vision, eye-tracking, and EEG research are finally out in 𝐵𝑒ℎ𝑎𝑣𝑖𝑜𝑟 𝑅𝑒𝑠𝑒𝑎𝑟𝑐ℎ 𝑀𝑒𝑡ℎ𝑜𝑑𝑠. So why did it take 1.5 years to publish this? Because we discovered a new property of OLEDs that vision researchers should be aware of... [1]

Olaf Dimigen@olaf.dimigen.de

Are you looking for a precise monitor for vision science, eye-tracking, or EEG? In a new preprint (w/ Arne Stein), we tested a new type of display with excellent performance in time-critical experiments: "High-speed" (240 Hz) OLED monitors. All details here: www.biorxiv.org/content/10.1...

biorxiv.orgA high-speed OLED monitor for precise stimulation in vision, eye-tracking, and EEG researchThe recent introduction of organic light-emitting diode (OLED) monitors with refresh rates of 240 Hz or more opens new possibilities for their use as precise stimulation devices in vision research, ex...
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Olaf Dimigen
@olaf.dimigen.de

[6] Again, it's important to say that these OLEDs are great, especially for fast and time-critical paradigms, but this is a new weakness we discovered that may affect certain slow paradigms.

Olaf Dimigen
@olaf.dimigen.de

[7] For more, see the published paper linked below (link.springer.com/article/10.3...). Also check out the work on OLEDs by Haila et al. (2025, J Vision). Both papers tests different things and are complementary; together providing a full picture on the strengths and weaknesses of OLEDs. [end]

link.springer.comAdvantages and artifacts of high-speed OLED monitors for vision, eye-tracking, and EEG research - Behavior Research MethodsThe recent introduction of organic light-emitting diode (OLED) monitors with refresh rates of 240 Hz or more opens new possibilities for their use as precise stimulation devices in vision research, ex...
Olaf Dimigen
@olaf.dimigen.de

Our detailed tests of high-speed OLED monitors for vision, eye-tracking, and EEG research are finally out in 𝐵𝑒ℎ𝑎𝑣𝑖𝑜𝑟 𝑅𝑒𝑠𝑒𝑎𝑟𝑐ℎ 𝑀𝑒𝑡ℎ𝑜𝑑𝑠. So why did it take 1.5 years to publish this? Because we discovered a new property of OLEDs that vision researchers should be aware of... [1]

Olaf Dimigen@olaf.dimigen.de

Are you looking for a precise monitor for vision science, eye-tracking, or EEG? In a new preprint (w/ Arne Stein), we tested a new type of display with excellent performance in time-critical experiments: "High-speed" (240 Hz) OLED monitors. All details here: www.biorxiv.org/content/10.1...

biorxiv.orgA high-speed OLED monitor for precise stimulation in vision, eye-tracking, and EEG researchThe recent introduction of organic light-emitting diode (OLED) monitors with refresh rates of 240 Hz or more opens new possibilities for their use as precise stimulation devices in vision research, ex...
View full thread
Olaf Dimigen
@olaf.dimigen.de

[4] In the figure (B) above, you see how the black checks of a checkerboard remain cooler than the white checks, even 20 sec later. The top panel (A) shows how a gray stimulus shown after a high-contrast black/white stimulus still differs in luminance (by about 1-2 cd/m^2) a minute later.

Olaf Dimigen
@olaf.dimigen.de

[5] So the effect is not large, but could be critical for some paradigms in which high-contrast stimuli are shown for long durations and technical afterimages would be critical, like in adaptation paradigms. For more details, see the paper.

Olaf Dimigen
@olaf.dimigen.de

Our detailed tests of high-speed OLED monitors for vision, eye-tracking, and EEG research are finally out in 𝐵𝑒ℎ𝑎𝑣𝑖𝑜𝑟 𝑅𝑒𝑠𝑒𝑎𝑟𝑐ℎ 𝑀𝑒𝑡ℎ𝑜𝑑𝑠. So why did it take 1.5 years to publish this? Because we discovered a new property of OLEDs that vision researchers should be aware of... [1]

Olaf Dimigen@olaf.dimigen.de

Are you looking for a precise monitor for vision science, eye-tracking, or EEG? In a new preprint (w/ Arne Stein), we tested a new type of display with excellent performance in time-critical experiments: "High-speed" (240 Hz) OLED monitors. All details here: www.biorxiv.org/content/10.1...

biorxiv.orgA high-speed OLED monitor for precise stimulation in vision, eye-tracking, and EEG researchThe recent introduction of organic light-emitting diode (OLED) monitors with refresh rates of 240 Hz or more opens new possibilities for their use as precise stimulation devices in vision research, ex...
Olaf Dimigen
@olaf.dimigen.de

[2] Overall, our tests show that high-speed OLEDs (now also available at 480 Hz) are fantastic for all time-critical, fast paradigms. However, in additional tests, we also found a previously unreported problem with OLEDs monitors in slow paradigms: 🔥🧊Localized temperature-luminance interactions 🔥🧊

Olaf Dimigen
@olaf.dimigen.de

[3] We used thermal imaging to illustrate this problem: When you show bright stimuli for long durations (i.e., seconds), the OLED's pixels heat up locally. This warming then causes *subsequent* stimuli to be shown brighter at these locations. A small and slow, but devious form of image persistence!

Olaf Dimigen
@olaf.dimigen.de

Happy to be a collaborator on this new work by first-author Xin Huang from Urs Maurer's lab. In two combined eye-tracking/EEG experiments, we asked whether rapidly processed magnocellular (M-pathway) information in parafoveal vision plays a special role for word recognition in natural reading. (1/2)

Olaf Dimigen reposted

Kabir Arora
@arora-borealis.bsky.social

Replying to @arora-borealis.bsky.social

Together with recent work by @olaf.dimigen.de on using RIFT with a monitor setup, as well as our own new preprint on using a monitor setup to track attention (www.biorxiv.org/content/10.1...), RIFT is now a lot more accessible both in terms of available recommendations and materials.

biorxiv.orgTracking attention using RIFT with a consumer-monitor setupRapid Invisible Frequency Tagging (RIFT) is a recent technique that extends the traditional frequency tagging approach by stimulating at frequencies beyond the threshold of perception (≥60Hz). By doin...

Olaf Dimigen reposted

Imaging Neuroscience
@imagingneurosci.bsky.social

Launched in 2023, Imaging Neuroscience is now firmly established, with full indexing (PubMed, etc.) and 700 papers to date. We're very happy to announce that we are able to reduce the APC to $1400. Huge thanks to all authors, reviewers, editorial team+board, and MIT Press.

Olaf Dimigen
@olaf.dimigen.de

🚨 New preprint: Invisible neural frequency tagging (RIFT) for the underfunded researcher: 👉 www.biorxiv.org/cgi/content/... RIFT uses high-frequency flicker to probe attention in M/EEG with minimal stimulus visibility and little distraction. Until now, it required a costly high-speed projector.

biorxiv.orgRapid Invisible Frequency Tagging (RIFT) with a consumer monitor: A proof-of-conceptRapid Invisible Frequency Tagging (RIFT) enables neural frequency tagging at rates above the flicker fusion threshold, eliciting steady-state responses to flicker that is almost imperceptible. While R...
Olaf Dimigen
@olaf.dimigen.de

🚨 New preprint: Invisible neural frequency tagging (RIFT) for the underfunded researcher: 👉 www.biorxiv.org/cgi/content/... RIFT uses high-frequency flicker to probe attention in M/EEG with minimal stimulus visibility and little distraction. Until now, it required a costly high-speed projector.

biorxiv.orgRapid Invisible Frequency Tagging (RIFT) with a consumer monitor: A proof-of-conceptRapid Invisible Frequency Tagging (RIFT) enables neural frequency tagging at rates above the flicker fusion threshold, eliciting steady-state responses to flicker that is almost imperceptible. While R...
Olaf Dimigen
@olaf.dimigen.de

Our small pilot study shows RIFT works with an affordable 480 Hz OLED monitor & EEG: ✅ Reliable timing ✅ Robust tagging at 60 & 64 Hz to barely visible flicker ✅ Even weak peripheral responses We hope this opens the door to RIFT studies by more labs. (with Ioana Badea, Iarina Simon & Mark M. Span)

Olaf Dimigen reposted

Sebastiaan Mathôt
@cogsci.nl

Interested in pupillometry, eye movements, visual attention, visual working memory, or related topics? Apply with our group in in beautiful, livable, and friendly Groningen! Reach out to @elkanakyurek.bsky.social, @van-rijn.org, @olaf.dimigen.de, @miles2708.bsky.social or myself to explore options!

European Commission@ec.europa.eu

Choose Science. Choose Europe. A new Marie Skłodowska-Curie Actions Postdoctoral Fellowships 2025 call is now open. With a budget of €404.3 million, it will support around 1,650 researchers from Europe and beyond. Apply by 10 September → europa.eu/!fBTMgF

Olaf Dimigen reposted

Rosa Ritunnano
@rritunnano.bsky.social

Instead of listing my publications, as the year draws to an end, I want to shine the spotlight on the commonplace assumption that productivity must always increase. Good research is disruptive and thinking time is central to high quality scholarship and necessary for disruptive research.

Olaf Dimigen reposted

Nico Schuck
@nicoschuck.bsky.social

I am a bit afraid the whole Starter Pack business leaves behind trainees — make sure to follow / repost them if their work interests you so their voices are heard #PsychSciSky #neuroskyence #compneurosky

Olaf Dimigen
@olaf.dimigen.de

Are you looking for a precise monitor for vision science, eye-tracking, or EEG? In a new preprint (w/ Arne Stein), we tested a new type of display with excellent performance in time-critical experiments: "High-speed" (240 Hz) OLED monitors. All details here: www.biorxiv.org/content/10.1...

biorxiv.orgA high-speed OLED monitor for precise stimulation in vision, eye-tracking, and EEG researchThe recent introduction of organic light-emitting diode (OLED) monitors with refresh rates of 240 Hz or more opens new possibilities for their use as precise stimulation devices in vision research, ex...

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