
인간의 뇌에서 주의력은 고정된 바이어스가 아니라 대상과 주의를 분산시키는 요소 간의 신경 표현 유사성에 따라 동적으로 조정되는 프로세스이며, 이러한 조정은 튜닝 선명화 메커니즘을 통해 이루어집니다.


coremsg

Visual stimuli compete with each other for cortical processing and attention biases this competition in favor of the attended stimulus. How does the relationship between the stimuli affect the strength of this attentional bias? Here, we used functional MRI to explore the effect of target-distractor similarity in neural representation on attentional modulation in the human visual cortex using univariate and multivariate pattern analyses. Using stimuli from four object categories (human bodies, cats, cars and houses), we investigated attentional effects in the primary visual area V1, the object-selective regions LO and pFs, the body-selective region EBA, and the scene-selective region PPA. We demonstrated that the strength of the attentional bias towards the target is not fixed but decreases with increasing target-distractor similarity. Simulations provided evidence that this result pattern is explained by tuning sharpening rather than an increase in gain. Our findings provide a mechanistic explanation for behavioral effects of target-distractor similarity on attentional biases and suggest tuning sharpening as the underlying mechanism in object-based attention.

### Competing Interest Statement

The authors have declared no competing interest.

Attention Modulates Human Visual Responses to Objects by Tuning Sharpening

주의력은-선명도-조정을-통해-사물에-대한-인간의-시각적-반응을-조절합니다


주의력은 선명도 조정을 통해 사물에 대한 인간의 시각적 반응을 조절합니다
