A weakness is that the results of this study cannot be generalised for other social classes, cultures, and genders. The sample only consisted of 22 white protestant boys from a middle-class family. Although the results can be generalised for most middle-class boys, this is a weakness as we cannot say that girls would also show high ingroup solidarity and outgroup hostility the same way that the boys did. Hostility and prejudice may also be shown differently in different cultures. Furthermore, as this is a very small sample, any anomalous behaviours would not be averaged out and identified.