The Origin and Development of Infant's Letters and Similarity to Ancient Letters related to his Drawings.

受试者Kei在1岁1个月6天开始涂鸦，在2岁6个月12天沿着画画开始抄写字母。作者在以往的研究中，将这种原始的字母形式称为“婴儿字母”，并探讨了婴儿字母的起源、发展、学习平假名的过程以及婴儿字母的转化与字母学习的关系。据推测，婴儿的字母发展时，婴儿有一个识别和沟通的愿望，而他们不能映射到字母的想法，由于平假名的知识不足。为了验证这一假设，有必要确定他们的字母在他们的图画中出现的频率，分析他们的书写模式、发展顺序和数量变化，以及书写模式与平面纸、线条纸和网格纸的关系。

The subject, Kei, started scribbling at the age of 1 year, 1 month, 6 days, and copying letters at the age of 2 years, 6 months, 12 days along with drawing. In his previous studies, the author termed this primitive form of letters 'infants letters' and investigated their origin and development and the process of learning Hiragana as well as the transformation of infants' letters in relation to letter learning. It is hypothesized that infants' letters develop when infants have a recognition of and a desire of communication while they cannot map thoughts onto letters due to insufficient knowledge of Hiragana. In order to test this hypothesis, it is necessary to identify the frequency with which inrants' letters appear in their drawings and to analyze that their writing patterns, developmental sequences, and quantitative changes, and that the relation between writing patterns and kinds of paper : plan paper, lined paper, and gridded paper.