Every society has patterns of socially acceptable/desirable behaviour. Deviation from these social norms can attract negative attention from others and may lead to rejection and labelling as ‘abnormal’.
Limitations of social norms definition
Limitation 1: Social norms are era and culture dependent rendering it impossible under this definition to make comparisons cross-cultural or longitudinal comparisons of rates of psychological abnormality.
For example, in 1968 the DSM (II) classed homosexuals as sexual deviants; today gay marriage is legal in the UK and although prejudice still exists, homosexuality is no longer a synonymous with mental disorder.
Likewise, in Catholic Ireland as recently as the 60s and 70s, bearing a child out of wedlock or disclosing sexual abuse was enough to gain a diagnosis of mental instability, leading to incarceration in a psychiatric hospital and brutal ECT and drug therapies.
Limitation 2: This definition does not consider the outcomes of the rejection of social norms and how these impact on whether a behaviour is defined as abnormal or not. Rejection of social norms may in fact lead to favourable outcomes for the individual. For example, some people who reject social norms may simply be eccentric and enjoy the attention which comes with standing out from the crowd, others may reject the prevailing norms the majority in favour of a more non-conformist lifestyle due to their religious or other beliefs. This choice may in fact facilitate self-actualization and improves self attitudes and self esteem.