【摘要】 本文回顾的经验研究表明了在发展研究中的两个普通和有用的观察结果:①刚出生时有一些能力已经成熟,另外一些则还不成熟。②不同的能力以不同的速度得到发展。具体讲,刚出生时的时间分辨力相当好,随后又迅速发展,2个月时就达到成人水平。另一方面,刚出生时空间分辨力和对比感受性很差,发展又相对缓慢,直到6个月时还没有达到成人水平。空间视觉的这种早期缺陷可能造成其它视觉能力的早期缺陷,如调节、辐合和立体视觉的缺陷。更多还原

【Abstract】 The empirical work reviewed here illustrates two common and useful observations in developmental research: (1) at birth some capabilities are reasonably mature and others are not and (2) different capabilities develop at distinctly different rates. Specifically, temporal resolution is fairly good at birth and develops rapidly, attaining adultlike levels by about two months of age. On the other hand, spatial resolution and contrast sensitivity are rather poor at birth and develop relatively slow; adult levels are not reached by the sixth month. Such early deficits in spatial vision may underlie early deficits in other visual capabilities such as accommodation, convergence, and stereopsis.更多还原