If your child does not seek for communication with friends and peers, often sinks into himself and own thoughts, then it is possible to tell that he is closed.
It is possible that such behavior is caused by rich inner world of the child which completely carries away it. At emergence of a similar situation the parents are obliged to find out the true reasons of isolation of the child, but at the same time they has to observe sensitivity as much as possible. If the child in family only, then such behavior for it is peculiar because to it from the very beginning does not get communication with children, and it can affect harmful further its communicative abilities. Therefore it is whenever possible necessary to try to compensate loneliness of the child by campaigns to friends, peers, on playgrounds, or at least to the yard where all other children play.
Much worse the situation is when the wrong, negative behavior of parents becomes the reason of isolation of the child. Now eternal employment of parents and a lack of attention paid to the child is very widespread. Such relation very much pushes away children, causes many negative emotions and forces to become the kid reserved. To avoid further such consequences of formation of the new personality, parents need to reconsider the relations in family, and then they will see as everything will change to the best, and the child will begin to trust them more.
How after all to establish the reasons of isolation of the child? In such cases drawings of young artists very often come to the rescue. It is not just scribbles, on them it is possible to make the whole psychological portrait of the person. If the child was four years old, then it makes sense to it to suggest to draw the family. If the kid drew himself most largely than the others, then perhaps you very strongly indulge him, and too small image of can confirm underestimation of the role though there can be also such option that the baby just lets know what it still small. If the child drew himself separately from all others, then not enough attention in family is paid to him. Anyway in such situation it is not necessary to stay idle, it is necessary to pay urgently attention to them and to take measures for their elimination.