Some of the psychogenic models proposed by these early researchers, such as the "schizophrenogenic mother", came under sustained criticism, from feminists who saw them as 'mother-blaming' and from a psychiatric profession that increasingly moved towards biological determinism. From the 1960s pharmacological treatments became the increasing focus of psychiatry, and by the 1980s the theory that the family dynamics could be implicated in the aetiology of schizophrenia became viewed as unacceptable by many mental health professionals in America and Europe. Before his death in 2001, at 90, Theodore Lidz, one of the main proponents of the "schizophrenogenic" parents theory, expressed regret that current research in biological psychiatry was "barking up the wrong tree". Like Lidz, Laing maintained until his death that the cause of both schizoid personality disorder and schizophrenia was influenced by family relationships. Some more recent research has provided support for this; for instance, child abuse has been shown to have a causal role in depression, PTSD, eating disorders, substance abuse and dissociative disorders, and research reveals that the more severe the abuse the higher the probability that psychiatric symptoms will develop in adult life.