Parsons developed the sick role model in the 1950s to describe illness as a temporary, medically sanctioned form of deviant behavior. Key aspects of the model include that the sick are excused from normal duties if they seek medical advice and comply with treatment. The model draws on Freudian concepts like the doctor-patient relationship resembling a parent-child dynamic. While influential, criticisms of the model include that it does not consider power imbalances between doctors and patients or account for chronic illness. However, the sick role model still provides a framework for cross-cultural comparisons of how societies view deviant behavior and time away from duties.