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Veera Ruuskanen

@veerahelmisofia.bsky.social

PhD candidate @rug.nl studying pupil size and visual perception ✨️👀🧠

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Trends in Cognitive Sciences@cp-trendscognsci.bsky.social · 2mo ago

Online Now: Beyond arousal: pupil fluctuations, neural activity, and behavior

Beyond arousal: pupil fluctuations, neural activity, and behavior

Spontaneous fluctuations in pupil size are correlated with neural activity and behavior in many ways. This is generally attributed to a single underlying cause: arousal. This unitary account disregards other potential underlying causes. To address this gap, we propose a comprehensive framework of four mechanisms that jointly underlie the complex and context-dependent relationships between spontaneous pupil-size fluctuations, neural activity, and behavior. In addition to arousal, we consider optical effects, brightness constancy, and self-generated visual stimulation. Based on this framework, we argue that pupil fluctuations should be considered beyond arousal, as a functionally important, yet still poorly understood, component of visual processing.

dlvr.it

Veera Ruuskanen@veerahelmisofia.bsky.social · 2mo ago

✨ New preprint ✨ With @cogsci.nl we show that larger pupils provide an advantage for near-threshold detection in the visual domain but not in the auditory domain 👀👂 We suggest that this effect is driven by optics 💡 (in addition to arousal ⚡) Check it out! ⬇️ www.biorxiv.org/content/10.6...

Larger Pupils are Associated with Improved Visual, but not Auditory, Near-Threshold Detection

Prestimulus pupil size is associated with near-threshold detection performance in both the visual and auditory domain, a relationship that is commonly attributed to arousal. However, given that larger...

biorxiv.org

Ana Vilotijević@anavili.bsky.social · 8mo ago

🚨Pupillometrists! Reviewer2: “But what if changing pupil size unintentionally affected arousal?” 👁️ Now we give you the answer! In collaboration with Snell lab www.snelllab.eu, we show that you can safely manipulate pupil size, via ipRGC activation, without unintentionally altering arousal!

A confound-free method to manipulate pupil size in psychological experiments - Psychonomic Bulletin & Review

Researchers are increasingly showing interest in the ways in which various cognitive processes are influenced by the size of the pupil. However, this realm of research is complicated by the pupil’s no...

link.springer.com