Braun Stephanie, Kavšek Michael
University of Bonn, Department of Psychology, Unit of Developmental and Educational Psychology, Kaiser-Karl-Ring 9, 53111 Bonn, Germany.
University of Bonn, Department of Psychology, Unit of Developmental and Educational Psychology, Kaiser-Karl-Ring 9, 53111 Bonn, Germany.
Infant Behav Dev. 2018 Aug;52:140-145. doi: 10.1016/j.infbeh.2018.07.003. Epub 2018 Aug 8.
Previous studies observed that responsiveness to horizontal disparity as such emerges at approximately 2 months of age. Moreover, 3- to 4-month-old infants utilize stereoscopic information to perceive object variations in depth. The present study investigated infants' ability to respond to crossed horizontal disparity information that defines two-dimensional shape. Infants 4 and 5 months of age were habituated to either a cross or the outline of a square. During the posthabituation period, they were presented with both shapes. The stimuli were dynamic random dot stereograms shown on an autostereoscopic monitor. The participants 5 but not 4 months of age displayed significant novelty preferences for the unfamiliar shape during the posthabituation period. Five-month-old infants are hence sensitive to horizontal disparity information that specifies shape.
先前的研究观察到，对水平视差的反应大约在2个月大时出现。此外，3至4个月大的婴儿利用立体视觉信息来感知物体在深度上的变化。本研究调查了婴儿对定义二维形状的交叉水平视差信息的反应能力。4个月和5个月大的婴儿分别对十字形或正方形轮廓产生习惯化。在习惯化后阶段，向他们展示这两种形状。刺激物是在自动立体显示器上显示的动态随机点立体图。5个月大而非4个月大的参与者在习惯化后阶段对不熟悉的形状表现出显著的新奇偏好。因此，5个月大的婴儿对指定形状的水平视差信息敏感。
