limitation of zimbardo to do with the role of dispositional influences
Fromm accused Zimbardo of exaggerating the power of the situation to influence behaviour.
For e.g, only a minority of the guards (about a third) behaved in a brutal manner. Another third were keen on applying the rules fairly. The rest actively tried to help and support the prisoners, sympathising with them, offering them cigs and reinstating privileges.
Most guards were able to resist situational pressures to conform to a brutal role.
This suggests that Zimbardo's conclusion- that participants were conforming to social roles- may be overstated, and that he may have minimised the role of dispositional factors such as personality