（20）連続調節持続時間測定法による凝視時間の基礎的研究—第Ⅰ篇 凝視時間と視標距離，照度，視標の大きさ，視標の色彩の変化について／第Ⅱ篇 凝視時間と対比

The fundamental studies by measuring the continuous gaze maintenence time.

1．緒言

　先に水川，高木氏により連続調節持続時間測定法（水川・高木氏凝視法）が考案され，個体の内的環境或は疲労度と言つたものを表現する一つの尺度として有用ではないかと述べられたが，私は其の基礎的研究として，1，視標距離，2，照度3，視標の大きさ，4，視標の色彩の各々の変化に対応して，連続調節持続時間が如何に変化するかを調べ，興味ある成績を得たので，此処に報告する。

　（以下連続調節持続時間測定法を簡単に凝視法，その時間を凝視時間と記す）。

The fundamental experiments of the continuous gaze maintenance time that the 10 times repeated gaze on the constant index after 2-3 seconds rest of accomodation were done and its total value were taken as the results were performed and the obtained results were as follows.

The gaze time were shortened as the index approach closer to the eyes when the index were within the near point, and they were delayed as the higher illumination and bigger index. Furthermore, they were delayed in order of black, blue, red, green, and yellow.