本縱貫研究，旨在探討嬰兒動作發展的情形，取二十八名健康、正常的嬰兒（男15，女13），於出生的第一年中，每月定期施以追踪測試，以期了解年齡、性別對嬰兒各項動作發展的影響，並企與民71年蘇建文等「出生至一歲嬰兒動作能力發展之横斷研究」相銜接。 本研究採測驗觀察法，於受試家中個别施測，並對各項發展項目，給予詳細的紀錄。再將動作發展項目得分，分别計算其平均數與標準差，同時以線性廻歸推估母羣體的發展模式，再經由重複量數二因子變異數分析、單純主要效果的分析與q-test來評量年齡、性别二因子對各項發展所造成的差異。 結果顯示，年齡是影響嬰兒動作發展的最主要因子，隨著年齡的增長，嬰兒的運動肌肉、神經亦渐趨成熟，同時，由於經驗的累積，遂使嬰兒的各項發展亦逐渐的成型。而性別因素，僅於眼睛隨物轉動項目與年齡有交互的影響，於其他項目則無顯着的差異。 所有的嬰兒動作發展，均遵循著一定的先後次序，同時亦合乎Gesell (1967)所提之「由頭至脚」，「由中心至邊緣」的發展原則，惟身體之左右側成熟的快慢因個體而有所不同。於測試的過程中亦發現，良好的刺激、教導與適度的營養亦為影響嬰兒動作發展的因素。

This is a longitudinal study of motor development of infants from birth to one year old.28 infants were selected as subjects from ”A Cross-sectional Study of Motor Development of Infants from Birth to One Year Old. (Su, et, al, 1982)” Each subject was observed in his or her home monthly. Mean, standard deviation, linear regression, repeated measures two-factor ANOVA, simple main effects and q-test, were used in the statistics and analysis of data. Results show that age of the subjects is a very important predictor to the motor development of infants. Sex is not an important factor. It's obvious that maturation is an important factor to determine the pattern and rate of motor development. The data of motor development in this longitudinal study are close to the data of cross-sectional study of motor development by Professor Su et al. in 1982. All of infants' motor development is orderly, just like the development pattern of motor characteristics in Gesell's study in 1929. In this study, we have found early stimulation has great influence on the development of infants, and good nutrition is important too.