小児の言語発達—（第2報）語彙の発達及びその検査法の検討

THE SPEECH DEVELOPMENT IN INFANTS AND THE METHOD OF EXAMINATION (SECOND REPORT)

　Ⅰ．緒言

　正常児の言語発達のうち語彙についてみると語彙量の増加という量的面と，幼児語から成人語への発展という質的面の二つの変化がみられる。従つて言語障害児の検査という臨床的見地に立つて語彙の発達を検討する場合にも少なくともこの2面の発達状態を調べる必要があるといえる。著者は第1報^1）において3歳以上の小児の発音の発達についてのべたが，本報では上述の如き見地から語彙の発達検査法について検討を試みたのでここに報告し御批判をあおぎたい。

A Study on the speech development of young children was made by analysis of the so-called, "baby-talk" which was noted, quantitatively and qualitativly, from the standpoint of the increase in the vocabulary and the changes and clearness in the enun-ciationof individual words. A certain selected set of test-words were used; the infant was considered as subnormal if the baby-talk was noted to be more than 30% in the speech at the age 3 and more than 20% at the age 3 1/2.