DiFranco D, Muir D W, Dodwell P C
Perception. 1978;7(4):385-92. doi: 10.1068/p070385.
It has been claimed that reaching to visually presented targets is a valid indicator of perceptual capacity in very young infants. In a previous report we failed to replicate the findings on which that claim is based. Here we reanalyze some of the tapes of the first report, using a less restricted criterion for what constitutes a reach, and a much more detailed analysis of the various components of reaching behaviour. A number of components are readily distinguished and reliably observed. Infants of seven to twenty-one days show great individual variation in their reaching, from no such behaviour to a great deal. Certain clusters of the components of reaching can be used to define different reaching "styles". The infants who reached most frequently in our sample all showed a dominant pattern of reaching, which in certain respects appears to be more mature than that of other babies. The finer analysis revealed no differences in the reaching behaviour to objects and pictures of objects, even among the most active reachers.
据称，伸手够向视觉呈现的目标是非常年幼婴儿感知能力的有效指标。在之前的一份报告中，我们未能重现该论断所依据的研究结果。在此，我们重新分析了第一份报告中的一些录像带，采用了对什么构成一次伸手够物限制较少的标准，并对伸手够物行为的各个组成部分进行了更为细致的分析。可以很容易地区分并可靠地观察到许多组成部分。7至21日龄的婴儿在伸手够物方面表现出很大的个体差异，从没有这种行为到有大量这种行为。伸手够物组成部分的某些聚类可用于定义不同的伸手够物“方式”。在我们的样本中伸手够物最频繁的婴儿都表现出一种占主导地位的伸手够物模式，在某些方面似乎比其他婴儿的模式更成熟。更细致的分析表明，即使在最活跃的伸手够物者中，伸手够向物体和物体图片的行为也没有差异。
