＞How about the idea of children pretending ？
不登校などの心が辛い子供がよい子を演じるという意味をより詳しく述べてみたいと思います。心が辛い子供がその心を辛くする物から逃げるとき、まずその心を辛くする物から逃げる必要があります。逃げられたら問題ないのですが、逃げられない時には、その辛くする物を攻撃します。その子どもの心を辛くする物から逃げられなくて、その辛くする物を攻撃できないとき、心が辛い子供が過去の経験を利用して、逃げる方法です。記憶を利用して行動をしますが、そこには大人のような意識的な行動ではありません。
よい子を演じるを英訳すると playing or acting or pretending like an extremely good child とすべきでしょう。そこには、親から見て、子どもを見ている大人から見て、子どもに自然態（無意識）からの感心する言動や行動があります。多くの場合、いつも以上に親や大人にとって良い子供だと感じさせる行動です。大人から見て問題となる子どもからの言動や行動がありません。それ故に親や大人の方でも、子どもがしっかりと大人の思いを理解してくれたと確信してしまう子どもの行動です。その結果親や大人がその子どもに関わらなくなり、放置してくれるようになります。子ども自身もそれ以上責められることがなくなりますからとても楽になります。ただし、その様にして辛さから逃げられたとしても、その時に受けた心の辛さは、その際の親や大人に対して子どもは怒りを感じて残っています。その怒りをその後で親や大人達に分からない様に発散して、子供の心の平穏を取り戻す必要があります。それが新たな問題を引き起こすことになります。
I would like to explain in more detail what it means for a child who is suffering emotionally, such as refusing to go to school, to act like a good child. When a child with a painful heart runs away from something that makes his heart painful, he first needs to run away from the thing that makes his heart painful. If you can escape, there is no problem, but if you can't escape, you will attack the thing that makes you hurt. When a child is unable to run away from something that makes their heart hard, and cannot attack that thing, this is a way for a child with a hard heart to use past experiences to escape. Although they use their memories to act, they do not act consciously like adults.
The English translation of "acting a good child" should be "playing or acting or pretending like an extremely good child." There are words and actions that naturally (unconsciously) impress children, both from the parents' point of view and from the adult's point of view. In many cases, this is a behavior that makes the child feel like a better child than usual to parents and adults. There are no words or actions from children that are problematic from an adult's point of view. Therefore, it is a child's behavior that even parents and adults are convinced that the child fully understands the adult's thoughts. As a result, parents and other adults become less involved with the child and end up leaving the child alone.
It will be much easier for the child himself as he will no longer be blamed. However, even if the child is able to escape from the pain in this way, the emotional pain they suffered at that time remains as they feel angry towards their parents and adults at the time. Afterwards, it is necessary to vent that anger in a way that parents and other adults do not know, and restore peace of mind to the child. That will cause new problems.
