为何孩子的学习时间越长，学习成绩越差呢？问题出在哪里？
My son is a typical "child who can't sit down". The highest record for him to stay in his chair and do his homework is only 30 minutes. After 20 or 30 minutes, he had to leave the desk and "run, jump and dance" for a few minutes before he had the courage to come back and continue his study
I once hated this habit - "do you have thorns on your buttocks? Can't you finish all your homework before you go to play?"
What once puzzled me was that the son of "let me fly" had a very good score, and he could rank first in all the California unified examinations.
On the contrary, not long ago, a Singaporean mother complained with a sad face: "our husband and wife are both graduates of famous universities, and our son is especially obedient. He can seriously sit at his desk and study from school until before he goes to bed... However, why did he fail in the unified examination several times, and why did he get worse in the higher grade?"
In fact, many modern studies have revealed that the effect of continuous long-term learning is not as good as "interval learning".
For example, Paul Kelley, a researcher at Oxford University, once conducted an experiment with Surrey business school in the UK.
600 business school students were divided into three groups. The three groups of students learn the same materials, but in different ways:
The first group participated in traditional academic lectures and seminars;
The second group was self-study;
The third group used the "intermittent" learning method.
Different from the first two groups of students, the students who use the "intermittent learning method" will have several short-time "intense learning" during the one hour long learning, and between the several "intense learning", about 10 minutes of rest time is arranged for each time to do things unrelated to learning, such as copying Picasso's paintings.
A week later, the students were tested. The test is divided into three parts: knowledge acquisition, knowledge application ability, and whether knowledge can be extended and applied to areas not covered.
What is surprising is that in the "knowledge acquisition" test, the students who use the "intermittent learning method" remember 20% more knowledge than the students who use the traditional learning method, and 23% more knowledge than the self-taught students!
In other words, students who "often rest" in one hour's study, compared with students who study continuously for one hour, remember one fifth more things!
In the "knowledge application" test, intermittent learners are still in the lead, and their application ability is 13% higher than that of traditional learners and 19% higher than that of self learners; In the "extended" test, intermittent learners are 10% higher than traditional learners and 15% higher than self learners.
Researchers have found that for learners who study continuously for one hour, 78% of the knowledge they can remember is acquired within the first half hour of learning.
After that, their brains lost their original vitality - only 22% of what they remembered in the second half hour.
In other words, in an hour's course, the effect of the first half is nearly four times that of the second half.
This is only the result of one hour of high-density learning. Let's imagine that many children today, after coming home from school, have to devote four or five hours of intense learning. If there is not enough rest, how much strength can their small brains have left?
回答问题之前，先澄清一个错误观点：学习时长会转化为学习成绩，即学习时长与学习成绩成正比。
所以，很多家长恨不得自家孩子一睁眼就去学习，甚至在孩子学习成绩不好的时候很苦恼：明明我家孩子学习时间已经够长了，怎么成绩还越来越差呢？问题出在哪里呢？
其实，决定学习成绩好坏的从来不是学习时长，而是单位时间的学习转换效率。只有单位时间学习转换效率高，学习时长才会转换成好的学习成绩，如果学习转换效率不高，甚至负转换的话，学习时间越长带给孩子的负面影响越大。
因为这样会让孩子产生自我怀疑，并不断否定自己，承受能力差的孩子甚至会因此走向极端。所以家长一旦发现孩子学习时间很长，而成绩却没有明显变化时，一定要查找原因对症下药。
一般来说，出现这种问题，需要家长注意三点：态度、兴趣和方法。
首先，对个人学习来说，智商决定成绩高度，态度决定成绩好坏。除去那些天选之子，普通人的学习成绩中占决定因素的就是态度。学习态度是单位时间学习转换效率的决定因素。俗话说态度决定一切，即便是有点夸张，但绝对正确。很难想象一个学习态度不端正的孩子，能在有限的学习时间内，把学到的内容消化吸收。更有甚者，校内学习走过场，校外补课全敷衍，这样的学习态度，学习时长除了决定父母为此所需要付出的金钱外，跟成绩有什么关系？
其次，兴趣是最好的老师。当然，兴趣同时也影响着态度，如果孩子对某一学科不感兴趣，只是碍于家长的面子，或者胁迫，不得不去学习，那只能说不管学习多久，都是假象。学习时间长短对孩子来说不过是受煎熬的长短，跟成绩无关，甚至随着时间的增加，孩子内心出现抵触情绪，学习效率又转负的倾向，家长一定要让孩子自愿、快乐地学习。
最后，学习方法也是一个不能忽视的方面。很多家长只知道让孩子去学习，或者看到孩子学习就觉得万事大吉，却从来不关心孩子地学习方法是否正确。只关注表面，期待结果，却不关心过程。记得有句俗语，“工作不得法，就像猪尾巴，整天摇不停，不知忙个啥。”这句话形象地说明方法对学习工作的重要性，方法得当，事半功倍，方法失当，事倍功半。
总之，需要家长们清醒认识到的是，决定学习成绩的因素很多，但时长恰恰是最不关键的那个。
