Never it is necessary
It not an anathema in relation to the child, this certain deprivation of communication, besides, that we remain responsible both we care of it and we remain strong, stable emotionally in relation to it.
In certain cases the door to the room can be a little open.
Never it is necessary to lock its hook or a latch.
In this sense the method loses any value and the child simply feels that of it want to get rid and punish.
It is very important to let know to the child that you will be near throughout all this time, he in other room so far that you will not leave anywhere..