Subconscious

The term subconscious is used in many different contexts and has no single or precise definition. This greatly limits its significance as a definition-bearing concept, and in consequence the word tends to be avoided in academic and scientific settings.

In everyday speech and popular writing, however, the term is very commonly encountered as a layperson's replacement for the unconscious mind, which in Freud's opinion is a repository for socially unacceptable ideas, wishes or desires, traumatic memories, and painful emotions put out of mind by the mechanism of psychological repression. However, the contents do not necessarily have to be solely negative. In the psychoanalytic view, the unconscious is a force that can only be recognized by its effects—it expresses itself in the symptom. Unconscious thoughts are not directly accessible to ordinary introspection, but are supposed to be capable of being "tapped" and "interpreted" by special methods and techniques such as meditation, random association, dream analysis, and verbal slips (commonly known as a Freudian slip), examined and conducted during psychoanalysis. Carl Jung developed the concept further. He divided the unconscious into two parts: the personal unconscious and the collective unconscious. The personal unconscious is a reservoir of material that was once conscious but has been forgotten or suppressed in the mind.

The idea of the "subconscious" as a powerful or potent agency has allowed the term to become prominent in the New Age and self-help literature, in which investigating or controlling its supposed knowledge or power is seen as advantageous. In the New Age community, techniques such as autosuggestion and affirmations are believed to harness the power of the subconscious to influence a person's life and real-world outcomes, even curing sickness. Skeptical Inquirer magazine criticized the lack of falsifiability and testability of these claims. Physicist Ali Alousi, for instance, criticized it as unmeasurable and questioned the likelihood that thoughts can affect anything outside the head. In addition, critics have asserted that the evidence provided is usually anecdotal and that, because of the self-selecting nature of the positive reports, as well as the subjective nature of any results, these reports are susceptible to confirmation bias and selection bias.

The word "subconscious" is an anglicized version of the French subconscient as coined by the psychologist Pierre Janet. Janet himself saw the subconscient as active in hypnotic suggestion and as an area of the psyche to which ideas would be consigned through a process that involved a "splitting" of the mind and a restriction of the field of consciousness.