Mind (pronounced /ˈmaɪnd/) is the aspect of intellect and consciousness experienced as combinations of thought, perception, memory, emotion, will and imagination, including all unconscious cognitive processes. The term is often used to refer, by implication, to the thought processes of reason. Mind manifests itself subjectively as a stream of consciousness.
Theories of mind and its function are numerous. Earliest recorded speculations are from the likes of Zoroaster, the Buddha, Plato, Aristotle, Adi Shankara and other ancient Greek, Indian and, later, Islamic philosophers. Pre-scientific theories grounded in theology concentrated on the supposed relationship between the mind and the soul, human's supernatural, divine or god-given essence.
Which attributes make up the mind is much debated. Some psychologists argue that only the higher intellectual functions constitute mind, particularly reason and memory. In this view the emotions—love, hate, fear, joy—are more primitive or subjective in nature and should be seen as different from the mind as such. Others argue that various rational and emotional states cannot be so separated, that they are of the same nature and origin, and should therefore be considered all part of what we call the mind.
In popular usage mind is frequently synonymous with thought: the private conversation with ourselves that we carry on "inside our heads." Thus we "make up our minds," "change our minds" or are "of two minds" about something. One of the key attributes of the mind in this sense is that it is a private sphere to which no one but the owner has access. No one else can "know our mind." They can only interpret what we consciously or unconsciously communicate.
The original meaning of Old English gemynd was the faculty of memory, not of thought in general. Hence call to mind, come to mind, keep in mind, to have mind of, etc. Old English had other words to express "mind", such as hyge "mind, spirit".
The generalization of mind to include all mental faculties, thought, volition, feeling and memory, gradually develops over the 14th and 15th centuries.[1]
The meaning of "memory" is shared with Old Norse, which has munr. The word is originally from a PIE verbal root *men-, meaning "to think, remember", whence also Latin mens "mind", Sanskrit manas "mind" and Greek μένος "mind, courage, anger".
Thought is a mental process which allows individuals to model the world, and so to deal with it effectively according to their goals, plans, ends and desires. Words referring to similar concepts and processes include cognition, idea, and imagination. Thinking involves the cerebral manipulation of information, as when we form concepts, engage in problem solving, reasoning and making decisions. Thinking is a higher cognitive function and the analysis of thinking processes is part of cognitive psychology.
Memory is an organism's ability to store, retain, and subsequently recall information. Although traditional studies of memory began in the realms of philosophy, the late nineteenth and early twentieth century put memory within the paradigms of cognitive psychology. In recent decades, it has become one of the principal pillars of a new branch of science called cognitive neuroscience, a marriage between cognitive psychology and neuroscience.
Imagination is accepted as the innate ability and process to invent partial or complete personal realms the mind derives from sense perceptions of the shared world. The term is technically used in psychology for the process of reviving in the mind percepts of objects formerly given in sense perception. Since this use of the term conflicts with that of ordinary language, some psychologists have preferred to describe this process as "imaging" or "imagery" or to speak of it as "reproductive" as opposed to "productive" or "constructive" imagination. Imagined images are seen with the "mind's eye". One hypothesis for the evolution of human imagination is that it allowed conscious beings to solve problems (and hence increase an individual's fitness) by use of mental simulation.
Consciousness in mammals (this includes humans) is an aspect of the mind generally thought to comprise qualities such as subjectivity, sentience, and the ability to perceive the relationship between oneself and one's environment. It is a subject of much research in philosophy of mind, psychology, neuroscience, and cognitive science. Some philosophers divide consciousness into phenomenal consciousness, which is subjective experience itself, and access consciousness, which refers to the global availability of information to processing systems in the brain.[2] Phenomenal consciousness has many different experienced qualities, often referred to as qualia. Phenomenal consciousness is usually consciousness of something or about something, a property known as intentionality in philosophy of mind.
Philosophy of mind is the branch of philosophy that studies the nature of the mind, mental events, mental functions, mental properties, consciousness and their relationship to the physical body. The mind-body problem, i.e. the relationship of the mind to the body, is commonly seen as the central issue in philosophy of mind, although there are other issues concerning the nature of the mind that do not involve its relation to the physical body.[3]
"Aristotelian thought has permeated most Occidental philosophical system until modern times, and the classification of man's function as vegetative, sensitive, and rational is still useful. In present popular usage, soul and mind are not clearly differentiated and some people, more or less consciously, still feel that the soul, and perhaps the mind are not clearly differentiated and some people, more or less consciously, still feel that the soul, and perhaps the mind, may enter or leave the body as independent entities. "- Jose M.R. Delgado [4]
Dualism and monism are the two major schools of thought that attempt to resolve the mind-body problem. Dualism is the position that mind and body are in some way separate from each other. It can be traced back to Plato,[5] Aristotle[6][7][8] and the Samkhya and Yoga schools of Hindu philosophy,[9] but it was most precisely formulated by René Descartes in the 17th century.[10] Substance dualists argue that the mind is an independently existing substance, whereas Property dualists maintain that the mind is a group of independent properties that emerge from and cannot be reduced to the brain, but that it is not a distinct substance.[11]
Monism is the position that mind and body are not physiologically and ontologically distinct kinds of entities. This view was first advocated in Western Philosophy by Parmenides in the 5th Century BC and was later espoused by the 17th Century rationalist Baruch Spinoza.[12] According to Spinoza's dual-aspect theory, mind and body are two aspects of an underlying reality which he variously described as "Nature" or "God". Physicalists argue that only the entities postulated by physical theory exist, and that the mind will eventually be explained in terms of these entities as physical theory continues to evolve. Idealists maintain that the mind is all that exists and that the external world is either mental itself, or an illusion created by the mind. Neutral monists adhere to the position that perceived things in the world can be regarded as either physical or mental depending on whether one is interested in their relationship to other things in the world or their relationship to the perceiver. For example, a red spot on a wall is physical in its dependence on the wall and the pigment of which it is made, but it is mental in so far as its perceived redness depends on the workings of the visual system. Unlike dual-aspect theory, neutral monism does not posit a more fundamental substance of which mind and body are aspects. The most common monisms in the 20th and 21st centuries have all been variations of physicalism; these positions include behaviorism, the type identity theory, anomalous monism and functionalism.[13]
Many modern philosophers of mind adopt either a reductive or non-reductive physicalist position, maintaining in their different ways that the mind is not something separate from the body.[13] These approaches have been particularly influential in the sciences, particularly in the fields of sociobiology, computer science, evolutionary psychology and the various neurosciences.[14][15][16][17] Other philosophers, however, adopt a non-physicalist position which challenges the notion that the mind is a purely physical construct. Reductive physicalists assert that all mental states and properties will eventually be explained by scientific accounts of physiological processes and states.[18][19][20] Non-reductive physicalists argue that although the brain is all there is to the mind, the predicates and vocabulary used in mental descriptions and explanations are indispensable, and cannot be reduced to the language and lower-level explanations of physical science.[21][22] Continued neuroscientific progress has helped to clarify some of these issues. However, they are far from having been resolved, and modern philosophers of mind continue to ask how the subjective qualities and the intentionality (aboutness) of mental states and properties can be explained in naturalistic terms.[23][24]
Psychology is the scientific study of human behaviour, mental functioning, and experience; noology, the study of thought. As both an academic and applied discipline, Psychology involves the scientific study of mental processes such as perception, cognition, emotion, personality, as well as environmental influences, such as social and cultural influences, and interpersonal relationships, in order to devise theories of human behaviour. Psychology also refers to the application of such knowledge to various spheres of human activity, including problems of individuals' daily lives and the treatment of mental health problems.
Psychology differs from the other social sciences (e.g., anthropology, economics, political science, and sociology) due to its focus on experimentation at the scale of the individual, or individuals in small groups as opposed to large groups, institutions or societies. Historically, psychology differed from biology and neuroscience in that it was primarily concerned with mind rather than brain. Modern psychological science incorporates physiological and neurological processes into its conceptions of perception, cognition, behaviour, and mental disorders.
Social psychology is the study of how social conditions affect humans. Scholars in this field are generally either psychologists or sociologists. Social psychologists who are trained in psychology tend to focus on individuals or small groups as the unit of study; sociologists tend to favor the study of larger groups and larger social units such as societies, although there are exceptions to these general tendencies in both fields. Despite their similarity, the disciplines also tend to differ in their respective goals, approaches, methods, and terminology. They also favor separate academic journals and societies.
Like biophysics and cognitive science, social psychology is an interdisciplinary area. The greatest period of collaboration between sociologists and psychologists was during the years immediately following World War II (Sewell, 1989). Although there has been increasing isolation and specialization in recent years, some degree of overlap and influence remains between the two disciplines.
In animals the brain, or encephalon (Greek for "in the head"), is the control center of the central nervous system, responsible for thought. In most animals, the brain is located in the head, protected by the skull and close to the primary sensory apparatus of vision, hearing, equilibrioception, taste and olfaction. While all vertebrates have a brain, most invertebrates have either a centralized brain or collections of individual ganglia. Primitive animals such as sponges do not have a brain at all. Brains can be extremely complex. For example, the human brain contains more than 100 billion neurons, each linked to as many as 10,000 others.
By analogy with the health of the body, one can speak metaphorically of a state of health of the mind, or mental health. Merriam-Webster defines mental health as "A state of emotional and psychological well-being in which an individual is able to use his or her cognitive and emotional capabilities, function in society, and meet the ordinary demands of everyday life." According to the World Health Organization (WHO), there is no one "official" definition of mental health. Cultural differences, subjective assessments, and competing professional theories all affect how "mental health" is defined. In general, most experts agree that "mental health" and "mental illness" are not opposites. In other words, the absence of a recognized mental disorder is not necessarily an indicator of mental health.
One way to think about mental health is by looking at how effectively and successfully a person functions. Feeling capable and competent; being able to handle normal levels of stress, maintaining satisfying relationships, and leading an independent life; and being able to "bounce back," or recover from difficult situations, are all signs of mental health.
Psychotherapy is an interpersonal, relational intervention used by trained psychotherapists to aid clients in problems of living. This usually includes increasing individual sense of well-being and reducing subjective discomforting experience. Psychotherapists employ a range of techniques based on experiential relationship building, dialogue, communication and behavior change and that are designed to improve the mental health of a client or patient, or to improve group relationships (such as in a family). Most forms of psychotherapy use only spoken conversation, though some also use various other forms of communication such as the written word, art, drama, narrative story, or therapeutic touch. Psychotherapy occurs within a structured encounter between a trained therapist and client(s). Purposeful, theoretically based psychotherapy began in the 19th century with psychoanalysis; since then, scores of other approaches have been developed and continue to be created.
The nature and origins of hominid intelligence is of natural interest to humans as the most successful and intelligent hominid species. As nearly a century of archaeological research has shown, the hominids evolved from earlier primates in eastern Africa. Like some non-primate tree-dwelling mammals, such as opossums, they evolved an opposable thumb, which enabled them to grasp and manipulate objects, such as fruit. They also possessed front-facing binocular vision.
Around 10 million years ago, the Earth's climate entered a cooler and drier phase, which led eventually to the ice ages. This forced tree-dwelling animals to adapt to their new environment or die out. Some primates adapted to this challenge by adopting bipedalism: walking on their hind legs. The advantages of this development are widely disputed. It was once thought that this gave their eyes greater elevation and the ability to see approaching danger further off but as we now know that hominids developed in a forest environment this theory has little real basis. At some point the bipedal primates developed the ability to pick up sticks, bones and stones and use them as weapons, or as tools for tasks such as killing smaller animals or cutting up carcases. In other words, these primates developed the use of technology, an adaptation other animals have not attained to the same capacity as these hominids. Bipedal tool-using primates evolved in the class of hominids, of which the earliest species, such as Sahelanthropus tchadensis, are dated to about 7 million years ago although hominid-made tools were not developed until about 2 million years ago. Thus bipedal hominids existed for 5 million years before they started making tools, rather than simply using preexisting objects in a tool like manner. The advantage of bipedalism would have been simply to be able to carry anything with survival value from an unfavorable environment to a more favorable one. Anything too big or heavy would have to be broken or cut. This would be an insight that led early minds to develop tools for the purpose.
From about 5 million years ago, the hominid brain began to develop rapidly. Some say this was because an evolutionary loop had been established between the hominid hand and brain. This theory says that the use of tools conferred a crucial evolutionary advantage on those hominids which had this skill. The use of tools required a larger and more sophisticated brain to co-ordinate the fine hand movements required for this task. However this theory has not been confirmed and many other theories have been developed based on scientific evidence. It is likely that a tool-using hominid would have made a formidable enemy and that surviving this new threat would have been the loop that increased brain size and mind power. By 2 million years ago Homo habilis had appeared in east Africa: the first hominid to make tools rather than merely use them. Several more species in the genus 'homo' appeared before fully modern humans developed, known as homo sapiens. These homo sapiens, which are the archaic version of the modern human, showed the first evidence of language, and the range of activities we call culture, including art and religion.
About 200,000 years ago in Europe and the Near East hominids known to us as Neanderthal man or Homo neanderthalensis appeared. They too had art, such as decorated tools for aesthetic pleasure, and culture, such as burying their dead in ways which suggest spiritual beliefs. Hotly debated in the scientific community is whether or not Homo sapiens developed from neanderthals or a combination of hominids. Some scientists say that the Neanderthals were wiped out by homo sapiens when they entered the region about 40,000 years ago. What is known is that by 25,000 years ago the Neanderthal was extinct. Between 120,000 to 165,000 years ago Homo sapiens reached their fully modern form. The first evidence of this was found in Africa, although once again the origins are widely debated between three theories, the Single-origin theory, the Multiregional model and the Assimilation model.
Animal cognition, or cognitive ethology, is the title given to a modern approach to the mental capacities of animals. It has developed out of comparative psychology, but has also been strongly influenced by the approach of ethology, behavioral ecology, and evolutionary psychology. Much of what used to be considered under the title of animal intelligence is now thought of under this heading. Animal language acquisition, attempting to discern or understand the degree to which animal cognition can be revealed by linguistics-related study, has been controversial among cognitive linguists.
In 1950 Alan M. Turing published "Computing machinery and intelligence" in Mind, in which he proposed that machines could be tested for intelligence using questions and answers. This process is now named the Turing Test. The term Artificial Intelligence (AI) was first used by John McCarthy who considers it to mean "the science and engineering of making intelligent machines".[25] It can also refer to intelligence as exhibited by an artificial (man-made, non-natural, manufactured) entity. AI is studied in overlapping fields of computer science, psychology, neuroscience and engineering, dealing with intelligent behavior, learning and adaptation and usually developed using customized machines or computers.
Research in AI is concerned with producing machines to automate tasks requiring intelligent behavior. Examples include control, planning and scheduling, the ability to answer diagnostic and consumer questions, handwriting, natural language, speech and facial recognition. As such, the study of AI has also become an engineering discipline, focused on providing solutions to real life problems, knowledge mining, software applications, strategy games like computer chess and other video games. One of the biggest difficulties with AI is that of comprehension. Many devices have been created that can do amazing things, but critics of AI claim that no actual comprehension by the AI machine has taken place.
The debate about the nature of the mind is relevant to the development of artificial intelligence. If the mind is indeed a thing separate from or higher than the functioning of the brain, then hypothetically it would be much more difficult to recreate within a machine, if it were possible at all. If, on the other hand, the mind is no more than the aggregated functions of the brain, then it will be possible to create a machine with a recognisable mind (though possibly only with computers much different from today's), by simple virtue of the fact that such a machine already exists in the form of the human brain.
Various religious traditions have contributed unique perspectives on the nature of mind. In many traditions, especially mystical traditions, overcoming the ego is considered a worthy spiritual goal.
Judaism teaches that "moach shalit al halev", the mind rules the heart. Humans can approach the Divine intellectually, through learning and behaving according to the Divine Will as enclothed in the Torah, and use that deep logical understanding to elicit and guide emotional arousal during prayer. Christianity has tended to see the mind as distinct from the soul (Greek nous) and sometimes further distinguished from the spirit. Western esoteric traditions sometimes refer to a mental body that exists on a plane other than the physical.
Hinduism's various philosophical schools have debated whether the human soul (Sanskrit atman) is distinct from, or identical to, Brahman, the divine reality.
Buddhism posits that there is actually no distinct thing as a human being, who merely consists of five aggregates, or skandhas. According to Buddhist philosopher Dharmakirti, mind is defined as "that which is clarity and cognizes"—where 'clarity' refers to the formless nature of the mind and 'cognizes' to the function of mind, namely that every mind must cognize an object.[26] The Indian philosopher-sage Sri Aurobindo attempted to unite the Eastern and Western psychological traditions with his integral psychology, as have many philosophers and New religious movements.
Taoism sees the human being as contiguous with natural forces, and the mind as not separate from the body. Confucianism sees the mind, like the body, as inherently perfectible.
Parapsychology is the scientific study of certain types of paranormal phenomena, or of phenomena which appear to be paranormal.[27], for instance precognition, telekinesis and telepathy. The term is based on the Greek para (beside/beyond), psyche (soul/mind), and logos (account/explanation) and was coined by psychologist Max Dessoir in or before 1889.[28] J. B. Rhine later popularized "parapsychology" as a replacement for the earlier term "psychical research", during a shift in methodologies which brought experimental methods to the study of psychic phenomena.[28] Parapsychology is controversial, with many scientists believing that psychic abilities have not been demonstrated to exist.[29][30][31][32][33] The status of parapsychology as a science has also been disputed.[34], with many scientists regarding the discipline as pseudoscience.[35][36][37]
Memetics is a theory of mental content based on an analogy with Darwinian evolution, which was originated by Richard Dawkins and Douglas Hofstadter in the 1980s. It purports to be an approach to evolutionary models of cultural information transfer. A meme, analogous to a gene, is an idea, belief, pattern of behaviour (etc) which is "hosted" in one or more individual minds, and which can reproduce itself from mind to mind. Thus what would otherwise be regarded as one individual influencing another to adopt a belief is seen memetically as a meme reproducing itself. As with genetics, particularly under Dawkins's interpretation, a meme's success may be due its contribution to the effectiveness of its host (ie, a the meme is a useful, beneficial idea), or may be "selfish", in which case it could be considered a "virus of the mind". Memetics is notable for sidestepping the traditional concern with the truth of ideas and beliefs. Interest in memetics has declined since about 2005.
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