António Damásio António Rosa Damásio, GOSE is a Portuguese behavioral neurologist and neuroscientist living and working in the United States. He is David Dornsife Professor of Neuroscience at the University of Southern California, where he heads USC's Brain and Creativity Institute. Prior to taking up his posts at USC, in 2005, Damásio was M.W. Van Allen Phineas Gage Phineas P. Gage [n 2] was an American railroad construction foreman now remembered for his incredible survival of an accident in which a large iron rod was driven completely through his head, destroying much of his brain's left frontal lobe, and for that injury's reported effects on his personality and behavior—effects so profound that friends Norman Geschwind Norman Geschwind can be considered the father of modern behavioral neurology in America. He was mentor to the cadre of behavioral neurologists who would shape the subspecialty for the 20th and early 21st centuries Elkhonon Goldberg Elkhonon Goldberg is a neuropsychologist and cognitive neuroscientist known for his work in hemispheric specialization and the "novelty-routinization" theory Patricia Goldman Rakic Patricia Goldman-Rakic (born Patricia Shoer) (April 22, 1937 – July 31, 2003) was an American neuroscientist/neurobiologist known for her pioneering study of the frontal lobe and her work on the cellular basis of working memory Pasko Rakic Pasko Rakic is a neuroscientist at Yale University. Rakic has been elected to the National Academy of Sciences USA, the American Academy of Arts and Sciences, and the Presidency of the Society for Neuroscience. He was a co-recipient, with Thomas Jessell and Sten Grillner, of the inaugural Kavli Prize for Neuroscience in 2008.. He is also a foreign Donald O. Hebb Donald Olding Hebb was a Canadian psychologist who was influential in the area of neuropsychology, where he sought to understand how the function of neurons contributed to psychological processes such as learning. He has been described as the father of neuropsychology and neural networks Kenneth Heilman He attended the University of Virginia and graduated from the University of Virginia School of Medicine in 1963 Edith Kaplan Edith Kaplan was a respected pioneer of neuropsychological tests who did most of her work at the Boston VA Hospital. Throughout her 50-year career in psychology, Dr. Edith Kaplan made invaluable contributions to the promotion of clinical neuropsychology as a specialty area in psychology. Her impact on our field is widespread, and encompasses many Muriel Lezak Muriel Deutsch Lezak is an American neuropsychologist best known for her book Neuropsychological Assessment, widely accepted as the standard in the field. She holds bachelor's and master's degrees from the University of Chicago, and earned a Ph.D. from the University of Portland in 1960 Benjamin Libet Benjamin Libet (April 12, 1916 - July 23, 2007) was a researcher in the physiology department of the University of California, San Francisco, and a pioneering scientist in the field of human consciousness. In 2003, he was the first recipient of the Virtual Nobel Prize in Psychology from the University of Klagenfurt, "for his pioneering Rodolfo Llinás Rodolfo R. Llinás is the Thomas and Suzanne Murphy Professor of Neuroscience and Chairman of the department of Physiology & Neuroscience at the NYU School of Medicine. He went to the Gimnasio Moderno school and received his MD from the Universidad Javeriana, Bogotá in 1959 and his PhD in 1965 from the Australian National University working Alexander Luria Alexander Romanovich Luria was a famous Soviet neuropsychologist and developmental psychologist. He was one of the founders of cultural-historical psychology and psychological activity theory Brenda Milner Brenda Milner, CC, GOQ, FRS has contributed extensively to the research literature on various topics in the field of clinical neuropsychology Karl H. Pribram Karl H. Pribram is a professor at Georgetown University , and an emeritus professor of psychology and psychiatry at Stanford University and Radford University. Board-certified as a neurosurgeon, Pribram did pioneering work on the definition of the limbic system, the relationship of the frontal cortex to the limbic system, the sensory-specific & Oliver Sacks Oliver Wolf Sacks, CBE , is a British neurologist residing in New York City. He is a professor of neurology and psychiatry at Columbia University, where he also holds the position of Columbia Artist. He previously spent many years on the clinical faculty of Yeshiva University's Albert Einstein College of Medicine Mark Rosenzweig Mark Richard Rosenzweig was an American research psychologist who found in animal studies on neuroplasticity that the brain continues developing anatomically, reshaping and repairing itself into adulthood based on life experiences, overturning the conventional wisdom that the brain reached full maturity in childhood Roger W. Sperry Roger Wolcott Sperry was a neuropsychologist, neurobiologist and Nobel laureate who, together with David Hunter Hubel and Torsten Nils Wiesel, won the 1981 Nobel Prize in Medicine for his work with split-brain research
H. M. Henry Gustav Molaison , better known as HM or H.M., was a memory-impaired patient who was widely studied from the late 1950s until his death. His case played a very important role in the development of theories that explain the link between brain function and memory, and in the development of cognitive neuropsychology, a branch of psychology that K. C. KC, also known as Patient K.C., is a famous patient in neuropsychology who was diagnosed with anterograde amnesia and temporally graded retrograde amnesia as the result of a motorcycle crash at the age of 30, in 1981. He has intact semantic memory but no episodic memory, caused by injury to his frontal lobe. He was the patient of famous memoryBenton Visual Retention Test The Benton Visual Retention Test is an individually administered test for ages 8-adult that measures visual perception and visual memory . It can also be used to help identify possible learning disabilities. The child is shown 10 designs, one at a time, and asked to reproduce each one as exactly as possible on plain paper from memory. The test is Clinical Dementia Rating The Clinical Dementia Rating or CDR is a numeric scale used to quantify the severity of symptoms of dementia Continuous Performance Task A Continuous Performance Task/Test, or CPT, is a psychological test which measures a person's sustained and selective attention and impulsivity. Sustained attention is the ability to maintain a consistent focus on some continuous activity or stimuli, and is associated with impulsivity. Selective attention is the ability to focus on relevant Glasgow Coma Scale Glasgow Coma Scale or GCS is a neurological scale that aims to give a reliable, objective way of recording the conscious state of a person for initial as well as subsequent assessment. A patient is assessed against the criteria of the scale, and the resulting points give a patient score between 3 and either 14 (original scale) or 15 (the more Hayling and Brixton tests The Hayling and Brixton tests are neuropsychological tests of executive function created by psychologists Paul W. Burgess and Tim Shallice Johari window A Johari window is a cognitive psychological tool created by Joseph Luft and Harry Ingham in 1955 in the United States, used to help people better understand their interpersonal communication and relationships. It is used primarily in self-help groups and corporate settings as a heuristic exercise Lexical decision task The lexical decision task is a procedure used in many psychology and psycholinguistics experiments. The basic procedure involves measuring how quickly people classify stimuli as words or nonwords. Although versions of the task had been used by researchers for a number of years, the term lexical decision task was coined by David E. Meyer and Roger Mini-mental state examination The mini-mental state examination or Folstein test is a brief 30-point questionnaire test that is used to screen for cognitive impairment. It is commonly used in medicine to screen for dementia. It is also used to estimate the severity of cognitive impairment at a given point in time and to follow the course of cognitive changes in an individual Stroop effect In psychology, the Stroop effect is a demonstration of the reaction time of a task. When the name of a color is printed in a color not denoted by the name (e.g., the word "red" printed in blue ink instead of red ink), naming the color of the word takes longer and is more prone to errors than when the color of the ink matches the name of Wechsler Adult Intelligence Scale The Wechsler Adult Intelligence Scale intelligence quotient (IQ) tests are the primary clinical instruments used to measure adult and adolescent intelligence. The original WAIS (Form I) was published in February 1955 by David Wechsler, as a revision of the Wechsler-Bellevue Intelligence Scale. The fourth edition of the test (WAIS-IV) was released
Wisconsin card sorting The Wisconsin Card Sorting Test is a neuropsychological test of "set-shifting", i.e. the ability to display flexibility in the face of changing schedules of reinforcement. The WCST was written by David A. Grant and Esta A. Berg. The Professional Manual for the WCST was written by Robert K. Heaton, Gordon J. Chelune, Jack L. Talley, GaryIn philosophy Philosophy is the study of general and fundamental problems concerning matters such as existence, knowledge, values, reason, mind, and language. It is distinguished from other ways of addressing fundamental questions by its critical, generally systematic approach and its reliance on rational argument. The word "philosophy" comes from the, psychology Psychology is the scientific study of human or other animal mental functions and behaviors. In this field, a professional practitioner or researcher is called a psychologist. Psychologists are classified as social or behavioral scientists. Psychological research can be considered either basic or applied. Psychologists attempt to understand the, and cognitive science Cognitive science is the interdisciplinary study of mind and intelligence, e.g., how information is represented and transformed in a brain or in a machine. It consists of multiple research disciplines, including psychology, artificial intelligence, philosophy, neuroscience, learning sciences, linguistics, anthropology, sociology, and education. It, perception is the process of attaining awareness Awareness is the state or ability to perceive, to feel, or to be conscious of events, objects or sensory patterns. In this level of consciousness, sense data can be confirmed by an observer without necessarily implying understanding. More broadly, it is the state or quality of being aware of something. In biological psychology, awareness is or understanding Understanding is a psychological process related to an abstract or physical object, such as a person, situation, or message whereby one is able to think about it and use concepts to deal adequately with that object of sensory Senses are the physiological capacities within organisms that provide inputs for perception. The senses and their operation, classification, and theory are overlapping topics studied by a variety of fields, most notably neuroscience, cognitive psychology , and philosophy of perception. The nervous system has a specific sensory system or organ, information Information, in its most restricted technical sense, is an ordered sequence of symbols. As a concept, however, information has many meanings. Moreover, the concept of information is closely related to notions of constraint, communication, control, form, instruction, knowledge, meaning, mental stimulus, pattern, perception, and representation. The word "perception" comes from the Latin words perceptio, percipio, and means "receiving, collecting, action of taking possession, apprehension with the mind Mind 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 or senses Senses are the physiological capacities within organisms that provide inputs for perception. The senses and their operation, classification, and theory are overlapping topics studied by a variety of fields, most notably neuroscience, cognitive psychology , and philosophy of perception. The nervous system has a specific sensory system or organ,."[1]
Perception is one of the oldest fields in psychology. The oldest quantitative law in psychology is the Weber-Fechner law The Weber–Fechner law attempts to describe the relationship between the physical magnitudes of stimuli and the perceived intensity of the stimuli. Ernst Heinrich Weber was one of the first people to approach the study of the human response to a physical stimulus in a quantitative fashion. Gustav Theodor Fechner (1801–1887) later offered an, which quantifies the relationship between the intensity of physical stimuli and their perceptual effects. The study of perception gave rise to the Gestalt Gestalt psychology or gestaltism of the Berlin School is a theory of mind and brain positing that the operational principle of the brain is holistic, parallel, and analog, with self-organizing tendencies. The Gestalt effect refers to the form-forming capability of our senses, particularly with respect to the visual recognition of figures and whole school of psychology, with its emphasis on holistic Holism is the idea that all the properties of a given system (physical, biological, chemical, social, economic, mental, linguistic, etc.) cannot be determined or explained by its component parts alone. Instead, the system as a whole determines in an important way how the parts behave approach.
What one perceives is a result of interplays between past experiences, including one’s culture, and the interpretation of the perceived. If the percept does not have support in any of these perceptual bases it is unlikely to rise above perceptual threshold.
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Types
Two types of consciousness are considerable regarding perception: phenomenal (any occurrence that is observable and physical) and psychological. The difference everybody can demonstrate to him- or herself is by the simple opening and closing of his or her eyes: phenomenal consciousness is thought, on average, to be predominately absent without sight. Through the full or rich sensations present in sight, nothing by comparison is present while the eyes are closed. Using this precept, it is understood that, in the vast majority of cases, logical solutions are reached through simple human sensation.[2] The analogy of Plato's Cave The Allegory of the Cave, also commonly known as Myth of the Cave, Metaphor of the Cave, The Cave Analogy, Plato's Cave or the Parable of the Cave, is an allegory used by the Greek philosopher Plato in his work The Republic to illustrate "our nature in its education and want of education". The allegory of the cave is written as a was coined to express these ideas.[clarification needed]
Passive perception (conceived by René Descartes René Descartes , (31 March 1596 – 11 February 1650), also known as Renatus Cartesius (Latinized form; adjectival form: "Cartesian"), was a French philosopher, mathematician, physicist, and writer who spent most of his adult life in the Dutch Republic. He has been dubbed the "Father of Modern Philosophy", and much of) can be surmised as the following sequence of events: surrounding → input (senses) → processing (brain) → output (re-action). Although still supported by mainstream philosophers, psychologists and neurologists, this theory is nowadays losing momentum. The theory of active perception has emerged from extensive research of sensory illusions, most notably the works of Richard L. Gregory Richard Langton Gregory, CBE, MA, D.Sc., FRSE, FRS is a British psychologist and Emeritus Professor of Neuropsychology at the University of Bristol. This theory, which is increasingly gaining experimental support, can be surmised as dynamic relationship between "description" (in the brain) ↔ senses ↔ surrounding, all of which holds true to the linear concept of experience.[3]
Perception and reality
Ambiguous imagesIn the case of visual perception, some people can actually see the percept shift in their mind's eye The phrase "mind's eye" refers to the human ability for visualization, i.e., for the experiencing of visual mental imagery; in other words, one's ability to "see" things with the mind[4]. Others, who are not picture thinkers, may not necessarily perceive the 'shape-shifting' as their world changes. The 'esemplastic' nature has been shown by experiment: an ambiguous image has multiple interpretations on the perceptual level. The question, "Is the glass half empty or half full?" serves to demonstrate the way an object can be perceived in different ways.
Just as one object can give rise to multiple percepts, so an object may fail to give rise to any percept at all: if the percept has no grounding in a person's experience, the person may literally not perceive it.
The processes of perception routinely alter what humans see. When people view something with a preconceived concept about it, they tend to take those concepts and see them whether or not they are there. This problem stems from the fact that humans are unable to understand new information, without the inherent bias of their previous knowledge. A person’s knowledge creates his or her reality as much as the truth, because the human mind can only contemplate that to which it has been exposed. When objects are viewed without understanding, the mind will try to reach for something that it already recognizes, in order to process what it is viewing. That which most closely relates to the unfamiliar from our past experiences, makes up what we see when we look at things that we don’t comprehend.[5]
This confusing ambiguity of perception is exploited in human technologies such as camouflage, and also in biological mimicry, for example by Peacock butterflies, whose wings bear eye markings that birds respond to as though they were the eyes of a dangerous predator. Perceptual ambiguity is not restricted to vision. For example, recent touch perception research Robles-De-La-Torre & Hayward 2001 found that kinesthesia based haptic perception strongly relies on the forces experienced during touch.[6]
Cognitive theories of perception assume there is a poverty of stimulus. This (with reference to perception) is the claim that sensations are, by themselves, unable to provide a unique description of the world. Sensations require 'enriching', which is the role of the mental model. A different type of theory is the perceptual ecology approach of James J. Gibson. Gibson rejected the assumption of a poverty of stimulus by rejecting the notion that perception is based in sensations. Instead, he investigated what information is actually presented to the perceptual systems. He and the psychologists who work within this paradigm detailed how the world could be specified to a mobile, exploring organism via the lawful projection of information about the world into energy arrays. Specification is a 1:1 mapping of some aspect of the world into a perceptual array; given such a mapping, no enrichment is required and perception is direct perception.
Preconceptions can influence how the world is perceived. For example, one classic psychological experiment showed slower reaction times and less accurate answers when a deck of playing cards reversed the color of the suit symbol for some cards (e.g. red spades and black hearts).[7]
There is also evidence that the brain in some ways operates on a slight "delay", to allow nerve impulses from distant parts of the body to be integrated into simultaneous signals.[8]
Perception-in-action
An ecological understanding of perception derived from Gibson's early work is that of "perception-in-action", the notion that perception is a requisite property of animate action; that without perception action would be unguided, and without action perception would serve no purpose. Animate actions require both perception and motion, and perception and movement can be described as "two sides of the same coin, the coin is action". Gibson works from the assumption that singular entities, which he calls "invariants", already exist in the real world and that all that the perception process does is to home in upon them. A view known as social constructionism (held by such philosophers as Ernst von Glasersfeld) regards the continual adjustment of perception and action to the external input as precisely what constitutes the "entity", which is therefore far from being invariant.[9]
Glasersfeld considers an "invariant" as a target to be homed in upon, and a pragmatic necessity to allow an initial measure of understanding to be established prior to the updating that a statement aims to achieve. The invariant does not and need not represent an actuality, and Glasersfeld describes it as extremely unlikely that what is desired or feared by an organism will never suffer change as time goes on. This social constructionist theory thus allows for a needful evolutionary adjustment.[10]
A mathematical theory of perception-in-action has been devised and investigated in many forms of controlled movement, and has been described in many different species of organism using the General Tau Theory. According to this theory, tau information, or time-to-goal information is the fundamental 'percept' in perception.
Theories of visual perception
- Interactive Activation and Competition
- Irving Biederman's Recognition by Components Theory
- Anne Treisman's Feature Integration Theory
See also
| Psychology portal |
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References
Notes
- ^ From Oxford English Dictionary: The definitive record of the English language
- ^ The Conscious Mind: In Search of a Fundamental Theory, David John Chalmers, illustrated, Oxford University Press US, 1997, 0195117891, pg. 25-26
- ^ Descartes His Life and Times, Elizabeth S. Haldane, BiblioBazaar, LLC, 1110319762, pg. 226
- ^ Wettlaufer, Alexandra K. (2003), In the mind's eye : the visual impulse in Diderot, Baudelaire and Ruskin, pg. 257, Amsterdam: Rodopi, ISBN 9042010355
- ^ Phenomenology of perception, By Maurice Merleau-Ponty, Colin Smith, Translated by Colin Smith, Contributor Colin Smith, Edition: 2, illustrated, reprint, Published by Routledge, 2002, ISBN 0415278414, 9780415278416, pg. 484-486.
- ^ Robles-de-la-torre, Gabriel; Hayward, Vincent (2001), "Force can overcome object geometry in the perception of shape through active touch", Nature 412 (6845): 445–448, doi:10.1038/35086588
- ^ "On the Perception of Incongruity: A Paradigm" by Jerome S. Bruner and Leo Postman. Journal of Personality, 18, pp. 206-223. 1949. Yorku.ca
- ^ by Robert Krulwich. All Things Considered, NPR. 18 May 2009.
- ^ Consciousness in Action, S. L. Hurley, illustrated, Harvard University Press, 2002, 0674007964, pg. 430-432,
- ^ Glasersfeld, Ernst von (1995), Radical Constructivism: A Way of Knowing and Learning, London: RoutledgeFalmer; Poerksen, Bernhard (ed.) (2004), The Certainty of Uncertainty: Dialogues Introducing Constructivism, Exeter: Imprint Academic; Wright. Edmond (2005). Narrative, Perception, Language, and Faith, Basingstoke: Palgrave Macmillan.
Bibliography
- Flanagan, J.R., Lederman, S.J. Neurobiology: Feeling bumps and holes, News and Views, Nature, 412(6845):389-91 (2001).
- James J. Gibson. The Senses Considered as Perceptual Systems. Boston 1966.
- James J. Gibson. The Ecological Approach to Visual Perception. Lawrence Erlbaum Associates, 1987. ISBN 0898599598
- Hayward V, Astley OR, Cruz-Hernandez M, Grant D, Robles-De-La-Torre G. Haptic interfaces and devices. Sensor Review 24(1), pp. 16–29 (2004).
- Morrell, Jessica Page (2006). Between the Lines: Master the Subtle Elements of Fiction Writing. Cincinnati, OH: Writer's Digest Books. ISBN 1582973938.
- Robles-De-La-Torre G. & Hayward V. Force Can Overcome Object Geometry In the perception of Shape Through Active Touch. Nature 412 (6845):445-8 (2001).
- Robles-De-La-Torre G. The Importance of the Sense of Touch in Virtual and Real Environments. IEEE Multimedia 13(3), Special issue on Haptic User Interfaces for Multimedia Systems, pp. 24–30 (2006).
- Rozelle, Ron (2005). Write Great Fiction: Description & Setting. Cincinnati, OH: Writer's Digest Books. ISBN 158297327X.
External links
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- Paradoxical haptic objects. An example of touch illusions of shape. See also the MIT Technology Review article:
- The Cutting Edge of Haptics, by Duncan Graham-Rowe.
- Theories of Perception Several different aspects on perception
- Richard L Gregory Theories of Richard. L. Gregory.
- Perceiving Reality Detailed overview explaining the perception of reality.
- Lecture - Alan Watts: The Nature of Consciousness Modern look at the foundations of perception.
- Lecture - Bruce Lipton - Biology of Perception Overview of biological perception.
- Dr Quantum - Double Slit Experiment - Animated presentation of problems with quantum perception.
- Optical Illusions Examples of well-known optical illusions.
- Perception and Education Perception and its educational significance.
Categories: Perception | Sources of knowledge | Experimental psychology | Unsolved problems in neuroscience | Neuropsychological assessment | Concepts in aesthetics | Concepts in epistemology | Concepts in metaphysics
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Fri, 16 Jul 2010 15:16:50 GMT+00:00
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Q. Why is understanding your own perception of health and wellness beneficial to working as a health and wellness professional?
Asked by help - Wed Feb 3 23:46:36 2010 - - 3 Answers - 0 Comments
A. cuz you cant help someone if you cant even help youreself. being aware of youre own health opens up the gate of comprehension.
Answered by knowledge void - Thu Feb 4 05:22:04 2010
