We investigate when infants exhibit knowledge of the familiar size of well-known objects and whether this knowledge is affected by stimulus format, that is, whether the stimuli are presented as real objects or matched pictures. Infants (130 7- and 12-month-olds) saw everyday objects such as sippy cups and pacifiers in their familiar size and novel sizes (larger or smaller than the familiar size) placed pairwise within infants' reach. We used a preferential-looking paradigm to investigate whether infants are able to discriminate familiar from novel sizes. Although, infants of both age groups looked longer toward real objects that were smaller or larger than the familiar size, there were no looking preferences for the pictures. These results suggest that although 7- and 12-month-olds demonstrate familiar size knowledge for real objects, this understanding does not generalize to pictorial representations of those objects.

中文翻译：

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婴儿对熟悉的物体尺寸的处理中真实物体相对于匹配图片的优势

我们调查婴儿何时表现出对已知物体的熟悉大小的知识，以及这些知识是否受刺激形式的影响，即刺激是作为真实物体还是匹配图片呈现的。婴儿（130 名 7 个月和 12 个月大的婴儿）看到日常用品，如吸管杯和奶嘴，它们熟悉的尺寸和新颖的尺寸（比熟悉的尺寸大或小）成对放置在婴儿够得着的地方。我们使用优先观察范式来研究婴儿是否能够区分熟悉的尺寸和新颖的尺寸。尽管两个年龄组的婴儿对比熟悉尺寸更小或更大的真实物体的观看时间更长，但对图片没有观看偏好。这些结果表明，虽然 7 个月大和 12 个月大的孩子表现出对真实物体熟悉的尺寸知识，