A strength of resistance to social influence is that research evidence supports the role of locus of control in resistance. For example, Holland (1967) replicated Milgram’s obedience study and found that 37% of participants with an internal locus of control refused to continue to the highest shock level, compared to only 23% of those with an external locus. This suggests that individuals with an internal LoC are more likely to resist obedience, increasing its validity.