Talk by Dr. Tobias Schöberl (DPZ, Göttingen): "How Brain Oscillations Shape Visual Perception and Attention"

A central question in cognitive science concerns how neural processes influence and interact with visual perception. Over the past two decades, a provocative hypothesis has emerged suggesting that perception and attention operate in a rhythmic fashion—characterized by approximately 7–10 brief, alternating episodes of high and low perceptual efficiency per second. This rhythmic framework posits that ongoing brain oscillations may directly underlie fluctuations in perceptual sensitivity, offering a compelling link between neural dynamics and conscious experience. However, the empirical support for this theory remains contentious.

In this talk, I provide a critical review of the ongoing debate surrounding rhythmic perception and attention. I present findings from a recent preregistered, high-powered replication study that failed to replicate the key behavioral evidence supporting the theory: namely, the claim that performance time courses following a reset event exhibit rhythmic temporal structure. This absence of replication challenges the robustness of the original findings.

So, is visual perception truly rhythmic? My tentative response is both yes and no. I propose a novel theoretical framework that reinterprets the relationship between brain oscillations and perception: rather than assuming a direct causal link, I suggest that brain rhythms and perceptual states are distinct processes that become aligned when attention is focused at specific moments in time. According to this view, oscillations define dynamic "windows of opportunity" for enhanced perceptual efficiency, while behavioral and electrophysiological signatures of rhythmic attention may appear subtle or inconsistent due to the transient and context-dependent nature of alignment. This reframing helps reconcile conflicting evidence and offers a more nuanced understanding of how brain rhythms contribute to perception.

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