Mulckhuyse Manon, Theeuwes Jan
Vrije Universiteit, Department of Cognitive Psychology, Amsterdam, The Netherlands.
Vision Res. 2010 Mar 17;50(6):606-13. doi: 10.1016/j.visres.2010.01.005. Epub 2010 Jan 13.
The current study investigated whether subliminal spatial cues can affect the oculomotor system. In addition, we performed the experiment under monocular viewing conditions. By limiting participants to monocular viewing conditions, we can examine behavioral temporal-nasal hemifield asymmetries. These behavioral asymmetries may arise from an anatomical asymmetry in the retinotectal pathway. The results show that even though our spatial cues were not consciously perceived they did affect the oculomotor system: relative to the neutral condition, saccade latencies to the validly cued location were shorter and saccade latencies to the invalidly cued location were longer. Although we did not observe an overall inhibition of return effect, there was a reliable effect of hemifield on IOR for those observers who showed an overall IOR effect. More specifically, consistent with the notion that processing via the retinotectal pathway is stronger in the temporal hemifield than in the nasal hemifield we found an IOR effect for cues presented in the temporal hemifield but not for cues presented in the nasal hemifield. We conclude that unconsciously processed spatial cues can affect the oculomotor system. In addition, the observed behavioral temporal-nasal hemifield asymmetry is consistent with retinotectal mediation.
当前的研究调查了阈下空间线索是否会影响动眼系统。此外，我们在单眼观察条件下进行了实验。通过将参与者限制在单眼观察条件下，我们可以研究行为上的颞侧-鼻侧半视野不对称性。这些行为不对称性可能源于视网膜顶盖通路中的解剖学不对称。结果表明，尽管我们的空间线索未被有意识地感知，但它们确实影响了动眼系统：相对于中性条件，向有效线索提示位置的扫视潜伏期更短，而向无效线索提示位置的扫视潜伏期更长。虽然我们没有观察到整体的返回抑制效应，但对于那些表现出整体返回抑制效应的观察者来说，半视野对返回抑制有可靠的影响。更具体地说，与通过视网膜顶盖通路在颞侧半视野比在鼻侧半视野处理更强的观点一致，我们发现对于颞侧半视野中呈现的线索有返回抑制效应，而对于鼻侧半视野中呈现的线索则没有。我们得出结论，无意识处理的空间线索会影响动眼系统。此外，观察到的行为颞侧-鼻侧半视野不对称与视网膜顶盖介导一致。
