Parker Samantha, Heathcote Andrew, Finkbeiner Matthew
Perception in Action Research Centre and Department of Cognitive Science, Macquarie University, Sydney, Australia1.
Department of Psychology, University of Tasmania, Sandy Bay, Tasmania, Australia2.
Adv Cogn Psychol. 2020 Dec 14;16(4):329-343. doi: 10.5709/acp-0307-8. eCollection 2020.
The extent to which the preparation of an eye movement and spatial attention both independently influence performance within the same task has long been debated. In a recent study that combined computational modelling with a dual-task, both saccade preparation and spatial cueing were revealed to separately contribute to the discrimination of targets oriented along the cardinal axis (horizontal and vertical). However, it remains to be seen whether and to what degree the same holds true when different perceptual stimuli are used. In the present study, we combined evidence accumulation modelling with a dual-task paradigm to assess the extent to which both saccade preparation and spatial attention contribute to the discrimination of full contrast targets oriented along the oblique axis (diagonal). The results revealed a separate and quantifiable contribution of both types of orienting to discrimination performance. Comparison of the magnitude of these effects to those obtained for cardinal orientation discrimination revealed the influence of saccade preparation and spatial attention to be six times smaller for oblique orientations. Importantly, the results revealed a separate and quantifiable contribution of both saccade preparation and spatial attention regardless of perceptual stimuli or stimulus contrast.
眼动准备和空间注意力在同一任务中对表现的独立影响程度长期以来一直存在争议。在最近一项将计算建模与双任务相结合的研究中，扫视准备和空间提示都被发现分别有助于对沿基本轴（水平和垂直）定向的目标进行辨别。然而，当使用不同的感知刺激时，这是否成立以及在何种程度上成立仍有待观察。在本研究中，我们将证据积累建模与双任务范式相结合，以评估扫视准备和空间注意力对沿斜轴（对角线）定向的全对比度目标辨别贡献的程度。结果显示，两种定向类型对辨别表现都有独立且可量化的贡献。将这些效应的大小与基本方向辨别所获得的效应大小进行比较，发现扫视准备和空间注意力对斜向的影响比对基本方向辨别所获得的影响小六倍。重要的是，无论感知刺激或刺激对比度如何，结果都显示扫视准备和空间注意力都有独立且可量化的贡献。
