According to Isbell's snake detection theory (SDT), the need to rapidly detect and thus avoid snakes had a major impact on the evolution of the primate visual system, and thus the origin and evolution of the primate lineage, as expansion of the visual sense is a key characteristic of primates. The SDT rests on the assumption that there are both cortical (conscious) and subcortical (unconscious) brain structures and pathways that are responsible for rapid visual detection of and quick avoidance reactions to snakes. Behavioral evidence for the SDT primarily comes from visual search tasks and presentations of images on a computer screen; our aim was to evaluate the SDT under more ecologically valid circumstances.

中文翻译：

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模拟生态实验中的优先蛇检测

根据伊斯贝尔的蛇检测理论（SDT），快速检测并避免蛇的需要对灵长类视觉系统的进化产生了重大影响，从而影响了灵长类动物谱系的起源和进化，因为视觉的扩展是灵长类动物的一个关键特征。SDT 假设有皮层（有意识）和皮层下（无意识）大脑结构和通路负责对蛇的快速视觉检测和快速回避反应。SDT 的行为证据主要来自视觉搜索任务和计算机屏幕上的图像呈现；我们的目标是在更生态有效的情况下评估 SDT。