読書時中の眼球運動の研究—とくに「戻り不足」について

A Study of Eye Movement in Reading

I．緒言

　私たちは多用途2素子記録装置を使つて読書時中の眼球運動を記録していると，新しい視野の文字のすべてが認識できないときに文字を読み返すために，逆戻りという現象が第1図に示したごとく起こるが，それとは異なつて一行を読み終え，新しい行へ移行するときにちようど逆戻りと同じような，第2図に示す波型が起こる。それを私たちは戻り不足と名づけたが，この戻り不足について検討した結果を今回は述べる。

Ocular movement was recorded while read-ing horizontally printed lines of various leng-ths at the distance of 30cm. A new phenomenon was discovered at the time of bringing back to the next printed line. In long printed lines in par-ticular, the eye did not immediately catch the beginning of the next line, but after a temporary pause, came to the beginnig of next line. The phenomenon is superficially similar to but dif ferent from that of regression, in which the eye returns to a previously scanned part of the material while reading on. The new phenomenon is named as insufficiency of brought back by the present authors.