Unconscious mind
The unconscious mind (or the unconscious) consists of the processes in the mind which occur automatically and are not available to introspection and include thought processes, memories, interests, and motivations. Even though these processes exist well under the surface of conscious awareness, they are theorized to exert an effect on behavior. The term was coined by the German Romantic philosopher Friedrich Schelling and later introduced into English by the poet and essayist Samuel Taylor Coleridge. Empirical evidence suggests that unconscious phenomena include repressed feelings, automatic skills, subliminal perceptions, and automatic reactions, and possibly also complexes, hidden phobias, and  desires. The concept was popularized by the Austrian neurologist and psychoanalyst Sigmund Freud. In psychoanalytic theory, unconscious processes are understood to be directly represented in dreams, as well as in slips of the tongue and jokes. Thus the unconscious mind can be seen as the source of dreams and automatic thoughts (those that appear without any apparent cause), the repository of forgotten memories (that may still be accessible to consciousness at some later time), and the locus of implicit knowledge (the things that we have learned so well that we do them without thinking). It has been argued that consciousness  is influenced by other parts of the mind. These include unconsciousness as a personal habit, being unaware and intuition. Phenomena related to semi-consciousness include awakening, implicit memory, subliminal messages, trances, hypnagogia and hypnosis. While sleep, sleepwalking, dreaming, delirium and comas may signal the presence of unconscious processes, these processes are seen as symptoms rather than the unconscious mind itself. Some critics have doubted the existence of the unconscious. Historical overview. The term "unconscious" () was coined by the 18th-century German Romantic philosopher Friedrich Schelling (in his "System of Transcendental Idealism", ch. 6, § 3) and later introduced into English by  the poet and essayist Samuel Taylor Coleridge (in his "Biographia Literaria"). Some rare earlier instances of the term "unconsciousness" ("") can be found in the work of the 18th-century German physician and philosopher Ernst Platner. Influences on thinking that originate from outside of an individual's consciousness were reflected in the ancient ideas of temptation, divine inspiration, and the predominant role of the gods in affecting motives and actions. The idea of internalised unconscious processes in the mind was also instigated in antiquity and has been explored across a wide variety of cultures. Unconscious aspects of mentality were referred to  between 2,500 and 600 BC in the Hindu texts known as the Vedas, found today in Ayurvedic medicine. Paracelsus is credited as the first to make mention of an unconscious aspect of cognition in his work "Von den Krankheiten" (translates as "About illnesses", 1567), and his clinical methodology created a cogent system that is regarded by some as the beginning of modern scientific psychology. William Shakespeare explored the role of the unconscious in many of his plays, without naming it as such. In addition, Western philosophers such as Arthur Schopenhauer, Baruch Spinoza, Gottfried Wilhelm Leibniz, Johann Gottlieb Fichte, Georg Wilhelm  Friedrich Hegel, Karl Robert Eduard von Hartmann, Søren Aabye Kierkegaard, and Friedrich Wilhelm Nietzsche used the word unconscious. In 1880 at the Sorbonne, Edmond Colsenet defended a philosophy thesis on the unconscious. Elie Rabier and Alfred Fouillee performed syntheses of the unconscious "at a time when Freud was not interested in the concept". Psychology. Psychologist Jacques Van Rillaer points out that the unconscious was not discovered by Freud. In 1890, when psychoanalysis was still unheard of, William James, in his monumental treatise on psychology ("The Principles of Psychology"), examined the way Schopenhauer, von Hartmann, Janet, Binet and others had used  the term 'unconscious' and 'subconscious.'" Historian of psychology Mark Altschule observes that "It is difficult—or perhaps impossible—to find a nineteenth-century psychologist or psychiatrist who did not recognize unconscious cerebration as not only real but of the highest importance." Eduard von Hartmann published a book dedicated to the topic, "Philosophy of the Unconscious," in 1869. Furthermore, 19th century German psychologists, Gustav Fechner and Wilhelm Wundt, had begun to use the term in their experimental psychology, in the context of manifold, jumbled sense data that the mind organizes at an "unconscious" level before revealing it as a cogent totality  in conscious form." Freud's view. Sigmund Freud and his followers developed an account of the unconscious mind. It plays an important role in psychoanalysis. Freud divided the mind into the conscious mind (or the ego) and the unconscious mind. The latter was then further divided into the id (or instincts and drive) and the superego (or conscience). In this theory, the unconscious refers to the mental processes of which individuals make themselves unaware. Freud proposed a vertical and hierarchical architecture of human consciousness: the conscious mind, the preconscious, and the unconscious mind—each lying beneath the other. He  believed that significant psychic events take place "below the surface" in the unconscious mind, like hidden messages from the unconscious. He interpreted such events as having both symbolic and actual significance. In psychoanalytic terms, the unconscious does not include all that is not conscious, but rather what is actively repressed from conscious thought or what a person is averse to knowing consciously. Freud viewed the unconscious as 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 did 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. In a sense, this view places the conscious self as an adversary to its unconscious, warring to keep the unconscious hidden. 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, free association (a method largely introduced by Freud), dream analysis, and verbal slips (commonly known as a Freudian slip), examined and conducted during psychoanalysis. Seeing as  these unconscious thoughts are normally cryptic, psychoanalysts are considered experts in interpreting their messages. Freud based his concept of the unconscious on a variety of observations. For example, he considered "slips of the tongue" to be related to the unconscious in that they often appeared to show a person's true feelings on a subject. For example, "I decided to take a summer curse". This example shows a slip of the word "course" where the speaker accidentally used the word curse which would show that they have negative feelings about having to do this. Freud noticed that also his patient 's dreams expressed important feelings they were unaware of. After these observations, he concluded that psychological disturbances are largely caused by personal conflicts existing at the unconscious level. His psychoanalytic theory acts to explain personality, motivation and mental disorders by focusing on unconscious determinants of behavior. Freud later used his notion of the unconscious in order to explain certain kinds of neurotic behavior. The theory of the unconscious was substantially transformed by later psychiatrists, among them Carl Jung and Jacques Lacan. In his 1932/1933 conferences, Freud "proposes to abandon the concept of the unconscious, which he declares ambiguous". Jung's  view. Carl Gustav Jung, a Swiss psychiatrist, developed the concept further. He agreed with Freud that the unconscious is a determinant of personality, but he proposed that the unconscious be divided into two layers: 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, much like Freud's notion. The collective unconscious, however, is the deepest level of the psyche, containing the accumulation of inherited psychic structures and archetypal experiences. Archetypes are not memories but energy centers or psychological functions that are apparent in the  culture's use of symbols. The collective unconscious is therefore said to be inherited and contain material of an entire species rather than of an individual. Every person shares the collective unconscious with the entire human species, as Jung puts it: "[the] whole spiritual heritage of mankind's evolution, born anew in the brain structure of every individual". In addition to the structure of the unconscious, Jung differed from Freud in that he did not believe that sexuality was at the base of all unconscious thoughts. Dreams. Freud. In terms of the unconscious, the purpose of dreams, as stated by  Freud, is to fulfill repressed wishes through the process of dreaming, since they cannot be fulfilled in real life. For example, if someone were to rob a store and to feel guilty about it, they might dream about a scenario in which their actions were justified and renders them blameless. Freud asserted that the wish-fulfilling aspect of the dream may be disguised due to the difficulty in distinguishing between manifest content and latent content. The manifest content consists of the plot of a dream at the surface level. The latent content refers to the hidden or disguised meaning  of the events in the plot. The latent content of the dream is what supports the idea of wish fulfillment. It represents the intimate information in the dreamer's current issues and childhood conflict. Opposing theories. In response to Freud's theory on dreams, other psychologists have come up with theories to counter his argument. Theorist Rosalind Cartwright proposed that dreams provide people with the opportunity to act out and work through everyday problems and emotional issues in a non-real setting with no consequences. According to her cognitive problem solving view, a large amount of continuity exists between our  waking thought and the thoughts that exist in dreams. Proponents of this view believe that dreams allow participation in creative thinking and alternate ways to handle situations when dealing with personal issues because dreams are not restrained by logic or realism. In addition to this, Allan Hobson and colleagues came up with the activation-synthesis hypothesis which proposes that dreams are simply the side effects of the neural activity in the brain that produces beta brain waves during REM sleep that are associated with wakefulness. According to this hypothesis, neurons fire periodically during sleep in the lower brain levels and  thus send random signals to the cortex. The cortex then synthesizes a dream in reaction to these signals in order to try to make sense of why the brain is sending them. However, the hypothesis does not state that dreams are meaningless, it just downplays the role that emotional factors play in determining dreams. Contemporary cognitive psychology. Research. While, historically, the psychoanalytic research tradition was the first to focus on the phenomenon of unconscious mental activity, there is an extensive body of conclusive research and knowledge in contemporary cognitive psychology devoted to the mental activity that is not mediated by  conscious awareness. Most of that (cognitive) research on unconscious processes has been done in the mainstream, academic tradition of the information processing paradigm. As opposed to the psychoanalytic tradition, driven by the relatively speculative (in the sense of being hard to empirically verify) theoretical concepts such as the Oedipus complex or Electra complex, the cognitive tradition of research on unconscious processes is based on relatively few theoretical assumptions and is very empirically oriented (i.e., it is mostly data driven). Cognitive research has revealed that automatically, and clearly outside of conscious awareness, individuals register and acquire more information than what they  can consciously remember and report. It is unclear how much, if any, of these processes can be experienced: The overflow hypothesis suggests that we experience much more than what we can subsequently report. The sparse phenomenology hypothesis forms an opposing view. Much research has focused on the differences between conscious and unconscious perception. There is evidence that whether something is consciously perceived depends both on the incoming stimulus (bottom up strength) and on top-down mechanisms like Attention. Recent research indicates that some unconsciously perceived information can become consciously accessible if there is cumulative evidence. Similarly, content that would normally  be conscious can become unconscious through inattention (e.g. in the Attentional blink) or through distracting stimuli like Visual masking. Unconscious processing of information about frequency. For example, an extensive line of research conducted by Hasher and Zacks has demonstrated that individuals register information about the frequency of events automatically (i.e., outside of conscious awareness and without engaging conscious information processing resources). Moreover, perceivers do this unintentionally, truly "automatically", regardless of the instructions they receive, and regardless of the information processing goals they have. The ability to unconsciously and relatively accurately tally the frequency of events appears to have little or  no relation to the individual's age, education, intelligence, or personality, thus it may represent one of the fundamental building blocks of human orientation in the environment and possibly the acquisition of procedural knowledge and experience, in general. Controversy and criticism. The notion that the unconscious mind exists at all has been disputed. Franz Brentano rejected the concept of the unconscious in his 1874 book "Psychology from an Empirical Standpoint", although his rejection followed largely from his definitions of consciousness and unconsciousness. Jean-Paul Sartre offers a critique of Freud's theory of the unconscious in "Being and Nothingness", based  on the claim that consciousness is essentially self-conscious. Sartre also argues that Freud's theory of repression is internally flawed. Philosopher Thomas Baldwin argues that Sartre's argument is based on a misunderstanding of Freud. Erich Fromm contends that "The term 'the unconscious' is actually a mystification (even though one might use it for reasons of convenience, as I am guilty of doing in these pages). There is no such thing as "the" unconscious; there are only experiences of which we are aware, and others of which we are not aware, that is, "of which we are unconscious". If  I hate a man because I am afraid of him, and if I am aware of my hate but not of my fear, we may say that my hate is conscious and that my fear is unconscious; still my fear does not lie in that mysterious place: 'the' unconscious." John Searle has offered a critique of the Freudian unconscious. He argues that the Freudian cases of shallow, consciously held mental states would be best characterized as 'repressed consciousness,' while the idea of more deeply unconscious mental states is more problematic. He contends that the very notion of a collection of  thoughts that exist in a privileged region of the mind such that they are "in principle never accessible" to conscious awareness, is incoherent. This is not to imply that there are not "nonconscious" processes that form the basis of much of conscious life. Rather, Searle simply claims that to posit the existence of something that is like a "thought" in every way except for the fact that no one can ever be aware of it (can never, indeed, "think" it) is an incoherent concept. To speak of "something" as a "thought" either implies that it is being thought by a  thinker or that it could be thought by a thinker. Processes that are not causally related to the phenomenon called thinking are more appropriately called the nonconscious processes of the brain. Other critics of the Freudian unconscious include David Stannard, Richard Webster, Ethan Watters, Richard Ofshe, and Eric Thomas Weber. David Holmes examined sixty years of research about the Freudian concept of "repression" and concluded that there is no positive evidence for this concept. Given the lack of evidence for many Freudian hypotheses, some scientific researchers proposed the existence of unconscious mechanisms that are very different from the Freudian ones . They speak of a "cognitive unconscious" (John Kihlstrom), an "adaptive unconscious" (Timothy Wilson), or a "dumb unconscious" (Loftus and Klinger), which executes automatic processes but lacks the complex mechanisms of repression and symbolic return of the repressed, and the "deep unconscious system" of Robert Langs. In modern cognitive psychology, many researchers have sought to strip the notion of the unconscious from its Freudian heritage, and alternative terms such as "implicit" or "automatic" have been used. These traditions emphasize the degree to which cognitive processing happens outside the scope of cognitive awareness, and show that things we are unaware of can  nonetheless influence other cognitive processes as well as behavior. Active research traditions related to the unconscious include implicit memory (see priming, implicit attitudes), and nonconscious acquisition of knowledge (see Lewicki, see also the section on contemporary cognitive psychology above).