P: this definition does distinguish between desirable and undesirable behaviour, a feature that was absent from the statistical infrequency model
E: social deviancy model also takes into account the effect that behaviour has on others. deviance is defined in terms of transgression of social rules and social rules are established in order to help people live together. according to this definition, abnormal behaviour is behaviour that damages others
L: this definition offers a practical and useful way of identifying undesirable and damaging behaviour