Rose David, Bradshaw Mark F, Hibbard Paul B
Department of Psychology, University of Surrey, Guildford GU2 7XH, UK.
Perception. 2003;32(5):635-40. doi: 10.1068/p3324.
'Preattentive' vision is typically considered to include several low-level processes, including the perception of depth from binocular disparity and motion parallax. However, doubt was cast on this model when it was shown that a secondary attentional task can modulate the motion aftereffect (Chaudhuri, 1990 Nature 344 60-62). Here we investigate whether attention can also affect the depth aftereffect (Blakemore and Julesz, 1971 Science 171 286-288). Subjects adapted to stationary or moving random-dot patterns segmented into depth planes while attention was manipulated with a secondary task (character processing at parametrically varied rates). We found that the duration of the depth aftereffect can be affected by attentional manipulations, and both its duration and that of the motion aftereffect varied with the difficulty of the secondary task. The results are discussed in the context of dynamic feedback models of vision, and support the penetrability of low-level sensory processes by attentional mechanisms.
“前注意”视觉通常被认为包括几个低层次的过程，包括从双眼视差和运动视差感知深度。然而，当有研究表明一项次要的注意力任务可以调节运动后效时（乔杜里，1990年，《自然》344卷60 - 62页），该模型受到了质疑。在此，我们研究注意力是否也会影响深度后效（布莱克莫尔和朱尔兹，1971年，《科学》171卷286 - 288页）。在通过一项次要任务（以参数变化速率进行字符处理）操纵注意力的同时，让受试者适应分割成深度平面的静止或移动随机点图案。我们发现深度后效的持续时间会受到注意力操纵的影响，并且其持续时间和运动后效的持续时间都随次要任务的难度而变化。我们将在视觉动态反馈模型的背景下讨论这些结果，并支持注意力机制对低层次感觉过程的穿透性。
