本研究的目的在利用我國修訂貝萊嬰兒發展量表中的「動作量表」對於我國臺灣地區2個月至30個月大的1680名嬰兒（男女各半）施測，藉以探討我國嬰兒動作發展的特徵，並建立常模，提供我國嬰兒發展保育及臨床診斷的參考。研究結果之主要發現為；1.嬰兒在動作量表各項目之通過率隨年齡而增加，2.嬰兒動作的發展隨年齡而呈直線發展趨向，3.男女嬰兒動作分數的平均數無明顯差異，4.中美兩個嬰兒動作發展的趨勢相似，具有直線趨向的特徵，我國嬰兒動作原始分數之平均數大致較美國同年齡者為高，5.嬰兒生生序、父親的教育程度、職業類別對嬰兒動作發展產生影響，而家庭型態、母親教育程度、母親就職情況及嬰兒照顧方式並未對嬰兒動作發展產生影響，至於城鄉地域的影響在各年齡組嬰兒中並無一致結果。

　　　　　The purpose of this project aims at standardizing the Motor Scale of Bayley Scales of Infant Development, establishing age norms for Chinese infants and toddlers and understanding the major characteristics of motor development of infants and toddlers. These knowledge can be for infant caring and clinical diagnosis. The subjects of this study were 1680 infant and toddlers chosen from the northern, central, southern and eastern parts of Taiwan according to their age, sex, maternal education and residence. They were divided into 14 age groups from two to thirty month old. Each subject had been given the motor scale of Bayley Scales of Infant Development. The main finding were as follows: (1)The rate of passing each item in the Motor Scale of Bayley Scales of Infant Development of the subject increased along with age. (2)The motor scores of the subject increased with their age according to a linear tendency. (3)there was no significant differences between female and male subjects in their motor score. (4)Birth order of the subjects, education and occupation of fathers were found to be the important factors to influence the motor development of subjects. Family pattern, education and occupation of mothers and ways of caring infant had no effects on the motor scores of the subject. (5)The Chinese and American subjects had shown the similar growth pattern of their motor development, but the average mean motor raw score was slightly higher for Chinese subject than that of the American subjects. (6)There was a significant positive corelation between the motor and mental development of the subject.