In the 1960s trauma models became associated with humanist and anti-psychiatry approaches, particularly in regard to understanding schizophrenia and the role of the family. Personality disorders have also been a focus, particularly borderline personality disorder, with the role of dissociation and 'freezing responses' (more extreme reactions than fight-flight when someone is terrified and traumatised) thought to have a significant role in the aetiology of psychological disturbance. Extreme versions of trauma models have implicated the fetal environment and the trauma of being born, but these are not well-supported in the academic literature and have been associated with recovered memory controversies.