Anxiety
The philosopher Søren Kierkegaard, in "The Concept of Anxiety" (1844), described anxiety or dread associated with the "dizziness of freedom" and suggested the possibility for positive resolution of anxiety through the self-conscious exercise of responsibility and choosing. In "Art and Artist" (1932), the psychologist Otto Rank wrote that the psychological trauma of birth was the pre-eminent human symbol of existential anxiety and encompasses the creative person's simultaneous fear of – and desire for – separation, individuation, and differentiation.
Cognitive distortion
In 1972, psychiatrist, psychoanalyst, and cognitive therapy scholar Aaron T. Beck published "Depression: Causes and Treatment." He was dissatisfied with the conventional Freudian treatment of depression, because there was no empirical evidence for the success of Freudian psychoanalysis. Beck's book provided a comprehensive and empirically supported theoretical model for depression—its potential causes, symptoms, and treatments. In Chapter 2, titled "Symptomatology of Depression", he described "cognitive manifestations" of depression, including low self-evaluation, negative expectations, self-blame and self-criticism, indecisiveness, and distortion of the body image.