Bugay Yıldırım

Bugay Yıldırım

@bugayyildirim.bsky.social

PhD candidate @ cablab.ku.edu.tr | serial dependence in vision, ensemble perception, attention, memory | R enthusiast | @rug.nl alum.

126 Followers 299 Following 22 Posts Joined Feb 2024
1 month ago
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Ignorance is bliss: Exploring the dual role of knowledge in event segmentation - Psychonomic Bulletin & Review Episodic memories are segmented. This study explores the dual role of prior knowledge in event segmentation, hypothesizing that knowledge leads to coarser segmentation when experiences align with it, ...

How does prior knowledge affect the way we experience the world?

In our new paper, we show that prior knowledge can both increase and decrease how often experience is segmented into events.

link.springer.com/article/10.3...

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4 months ago
View from your office onto Giessen and surrounding villages.

Please repost! I am looking for a PhD candidate in the area of Computational Cognitive Neuroscience to start in early 2026.

The position is funded as part of the Excellence Cluster "The Adaptive Mind" at @jlugiessen.bsky.social.

Please apply here until Nov 25:
www.uni-giessen.de/de/ueber-uns...

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4 months ago
A static image of the Mainz-Linez illusion: 4 vertical wiggly lines, in the middle of each a red disk. A small black cross in the center.

A new addition to my “Visual Phenomena and Optical Illusions” collection: “Mainz-Linez”. Here's the live demonstration and explanation of the somewhat mysterious title: michaelbach.de/ot/mot-Mainz.... Enjoy!

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4 months ago
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Check our new Psych Science paper w/Daniil Azarov & Daniil Grigorev. Although an ability to recognize a familiar object among new ones clearly depends on how many and which objects there are, we show a remarkable stability of underlying "representational spaces"
journals.sagepub.com/doi/10.1177/...

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4 months ago

Exactly!

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4 months ago

About “T2|T1” and “T3|T1” errors: since this was an attentional blink design, we only included trials where T1 was accurately reported (<22.5°). This ensures our “uncertainty” manipulation works properly.

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4 months ago

In Fig. 5, the purple line shows trials where T1 is clockwise to T3. Left pane: T2 is also clockwise - both push T3 the same way = stronger repulsion from T2. Right pane: T2 is counterclockwise - T1 and T2 oppose = weaker repulsion from T2.

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4 months ago

In Fig. 4, labels refer to T1-induced bias. Different-colored lines show how T1-induced repulsion is further amplified when T3 also repels T2 in the same direction, and vice versa. The same logic applies in Fig. 5 too but now labels refer to T2-induced bias.

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4 months ago

Thanks a lot! I can see how Figures 4 & 5 can be confusing. I think computing bias instead of errors is a great idea—I’ll definitely try and implement this.

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4 months ago
Target Fidelity, but not Inducer Fidelity, Modulates Repulsive Serial Dependence of Visual Working Memory Representations Visual representations are open to systematic functional biases. In visual working memory, representations of serially presented stimuli can either attract or repel each other. Such serial dependence ...

📢New preprint w/ ayaecanb.bsky.social! Noisy visual representations strengthen repulsive serial biases but inducer uncertainty doesn’t. Working memory adapts to reduce error in ways that exceed simple Bayesian explanations.
#workingmemory #VisualWorkingMemory
🔗 www.researchsquare.com/article/rs-7...

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5 months ago

💔

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8 months ago
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How our expectations change what we feel and see This study explores how our expectations influence what we feel and see. We asked participants to predict how painful or visually intense an upcoming stimulus would be based on cues that they believed...

Predictive processing models posit top-down influences of internal models on brain processing at multiple levels...but how deeply does predictive info penetrate into perception? What are the limits? New paper with @rotembot.bsky.social and @fmristats.bsky.social
link.growkudos.com/1mmf28pbmkg

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7 months ago

Better version of the meme.

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8 months ago

Yes, it involved human participants (not patients though), but in fact it was not aimed at improving memory. Rather we investigated how visual attention and perception work.

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8 months ago
Attentional modulation of outlier processing

New paper out with @ahugokce.bsky.social and @ayaecanb.bsky.social! 👁️
We show that attentional cues can override automatic outlier detection in visual ensembles. Even salient "odd ones out" aren't immune to where attention is directed. rdcu.be/eqVsS
#workingmemory #visualworkingmemory

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10 months ago

Science has no passport but I do. Unfortunately, mine needs visas too. And guess what we don't have in Turkey? Visa appointments.

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10 months ago

A free training workshop on PsychoPy, perfect for research trainees!

#visionscience #cogsci #workingmemory #vss2025

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11 months ago

Grateful to #ECVP2025 for the student travel award! Can't wait to join the amazing vision science community in Mainz.

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1 year ago

That's an interesting question. You’re likely familiar with no-report paradigms investigating serial dependence, which might be relevant here. In our study, we collected T1 responses to elicit the attentional blink but haven’t randomized response order or used a no-report paradigm in our lab yet.

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1 year ago
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Temporal integration of target features across and within trials in the attentional blink - Attention, Perception, & Psychophysics Attentional blink research has typically investigated attentional limitations in multiple target processing. The current study investigated the temporal integration of target features in the attention...

I believe this might have been the critical factor in the change of direction. In another study, where we used Gabor patches, we also found attractive biases in AB. link.springer.com/article/10.3...

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1 year ago

Yes, exactly! I think this might have something to do with the fact that they sampled target orientations randomly from uniform. In our study, we sampled one orientation randomly then added/subtracted a certain "delta" to generate two other orientations.

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1 year ago
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Neural dynamics of the attentional blink revealed by encoding orientation selectivity during rapid visual presentation - Nature Communications People often fail to perceive the second of two brief visual targets, a phenomenon known as the attentional blink (AB). Here the authors modelled behaviour and brain activity to show that the AB arise...

I'm not sure how relevant the following paper is. It is an RSVP design and due to the attentional blink effect at certain inter-target intervals, addressing your question might be challenging. Yet, I think it could still offer some useful insights. www.nature.com/articles/s41...

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1 year ago

Thank you! Yes, they reported all three on each trial in the presented order. We used color as an additional cue to minimize potential swap errors.

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1 year ago
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Back from an inspiring @psychonomicsociety.bsky.social Annual Meeting in NYC! Shared my poster on Serial Dependence in Visual Working Memory & Target Fidelity. 👁️Grateful for the great conversations—excited to build on this work! PDF: tinyurl.com/yx5azseb #workingmemory #CogSci #VisionScience

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1 year ago

I literally dreamed up a new experimental paradigm last night. Stay tuned to see if I make a breakthrough or just lose my mind.

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1 year ago

Does one preprint a review? I did anyway: If you're interested in temporal aspects of perception, attention, and working memory, check out my review on how temporal integration plays an adaptive role in all of those. 👉https://osf.io/preprints/psyarxiv/h5cvx

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1 year ago

Working memory people, is there a paper with a good dissection of sources on noise in VWM? Like, how much the noise of the initial percept adds, how much it is worsened during the delay period, how much is added during the report... #workingmemory #vwm #cogpsy

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1 year ago

🚨Job alert!🚨 Are you curious about curiosity, and looking for a post-doc position? Then please consider applying: www.ru.nl/en/working-a...
Feel free to e-mail/DM me if you have questions.

Thanks very much for sharing/re-posting!

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2 years ago
Summer School Visual Neuroscience Rauischholzhausen 2024

The “Visual Neuroscience” European Summer School in Rauischholzhausen is open to applications.
Often copied, never equalled.
Deadline: 17 March 2024
#visionscience

www.allpsych.uni-giessen.de/rauisch/inde...

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2 years ago

We have obtained further funding (thanks Psychonomics/APS!) and the fees have now been finalized. We have also uploaded a tentative syllabus. Deadline for applications is approaching--be quick!

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