While violating cultural expectations and social norms can be an indicator of a psychological disorder, this criterion is insufficient on its own. Because behaviors and social rules vary significantly across cultures, what is considered appropriate in one society may be viewed as abnormal in another. For example, actions like making direct eye contact or responding to a stranger's smile can be interpreted as respectful in one culture but rude or aggressive in another. Therefore, cultural context is essential when evaluating whether a behavior's deviation from social norms suggests a psychological disorder.