Infants differ in their level of eye movement control, which at the extreme could be linked to autism. We assessed eye movements in 450 twins (225 pairs, 57% monozygotic, 46% female, aged 5–6 months) using the gap‐overlap eye‐tracking task. Shorter latency in the gap condition was associated with having more parent‐rated autistic traits at 2 years. Latency across the task's three conditions was primarily explained by one highly heritable latent factor likely representing individual differences in basic oculomotor efficiency and/or in visual information processing. Additionally, disengagement of attention was linked to unique genetic factors, suggesting that genetic factors involved in visual attention are different from those involved in basic visual information processing and oculomotor efficiency.

中文翻译：

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遗传和环境对婴儿早期视觉注意力和动眼神经控制个体差异的贡献


婴儿的眼球运动控制水平不同，这在极端情况下可能与自闭症有关。我们使用间隙重叠眼动追踪任务评估了 450 对双胞胎 （225 对，57% 同卵，46% 女性，年龄 5-6 个月） 的眼球运动。间隙条件下较短的潜伏期与 2 岁时具有更多父母评定的自闭症特征相关。任务的三种情况的潜伏期主要由一个高度可遗传的潜在因素解释，可能代表基本动眼神经效率和/或视觉信息处理的个体差异。此外，注意力脱离与独特的遗传因素有关，这表明参与视觉注意力的遗传因素与参与基本视觉信息处理和动眼神经效率的遗传因素不同。