作者在控制与学习疲劳有关的因素不变,只增加学习负荷量的实验条件下,用剂量作业试验和短时记忆测定等方法,对初中二年级113名学生进行疲劳动态观察,初步结果表明,每个学习日中,上课6节和课外作业2节,对初中学生是适宜的。同时,对“自我感觉疲劳率”这一指标的适用性,以及组织走读生到校自习,进行学习负荷量卫生标准研制实验观察方法的可行性作了探讨。 The author studied the fatigue of 113 students in second grade of junior middle school under the condition of controlling the factors related to learning fatigue and only increasing the learning load by means of dose operation test and short-term memory test. The preliminary results showed that, For each study day, six lessons and two extra-curricular assignments are suitable for junior high school students. At the same time, the applicability of the index of “self-perceived fatigue rate”, and the feasibility of organizing experimental students to attend school and study the health standards of experimental load to develop experimental observation methods are discussed.