However, this theory fails to recognise that children do cross margins in order to acquire a complex identity. In addition, it does ignore the other factors that have major parts in development such as biology and cognition. Because we potentially have access to these subsystems we are able to have more social knowledge, an increased set of possibilities for learning problem solving, and access to new dimensions of self-exploration. Effects trauma has on children Earlier on it was thought that, even if children experienced trauma, it would cause only transient distress. To date, it is generally accepted that exposure can cause severe and long-term impairment. Children may show mental as well as physical difficulties that have a negative