“Six decades ago our psychoanalytically oriented predecessors wrestled with the problem of formulating a credible account of the unconscious. Paradoxically, perhaps, having gathered such convincing evidence in recent years to support the existence of extensive and elaborate nonconscious information processing, contemporary psychologists now are faced with precisely the reverse problem. A major challenge confronting modern psychology is the need to develop an adequate account of the nature and function of consciousness”
Williams et al (1997 [Cognitive psychology and emotional disorders, 2nd ed.], p. 260), via an article by Mick Power (2000) in the Psycholologst