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Opponent-process Theory
Opponent-process theory is a psychological and neurology, neurological model that accounts for a wide range of behaviors, including color vision. This model was first proposed in 1878 by Ewald Hering, a German physiologist, and later expanded by Richard Solomon (psychologist), Richard Solomon, a 20th-century psychologist. Visual perception The opponent-process theory was first developed by Ewald Hering. He noted that there are color combinations that we never see, such as reddish-green or bluish-yellow. Opponent-process theory suggests that color perception is controlled by the activity of three opponent systems. In the theory, he postulated about three independent receptor types which all have opposing pairs: white and black, blue and yellow, and red and green. These three pairs produce combinations of colors for us through the opponent process. Furthermore, according to this theory, for each of these three pairs, three types of chemicals in the retina exist, in which two typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Psychological
Psychology is the scientific study of mind and behavior. Its subject matter includes the behavior of humans and nonhumans, both consciousness, conscious and Unconscious mind, unconscious phenomena, and mental processes such as thoughts, feelings, and motivation, motives. Psychology is an academic discipline of immense scope, crossing the boundaries between the Natural science, natural and social sciences. Biological psychologists seek an understanding of the Emergence, emergent properties of brains, linking the discipline to neuroscience. As social scientists, psychologists aim to understand the behavior of individuals and groups.Hockenbury & Hockenbury. Psychology. Worth Publishers, 2010. A professional practitioner or researcher involved in the discipline is called a psychologist. Some psychologists can also be classified as Behavioural sciences, behavioral or Cognitive science, cognitive scientists. Some psychologists attempt to understand the role of mental functions in i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Opponent Process Theory Of Drug Addiction
{{DEFAULTSORT:Opponent, The ...
The Opponent may refer to: * ''The Opponent'' (1988 film), a 1988 film starring Daniel Greene * ''The Opponent'' (2000 film), a 2000 film starring Erika Eleniak See also * * * * * Opposition (other) * Antagonist (other) * Villain (other) A villain is an evil person or fictional character. Villain(s) or The Villain(s) may also refer to: Books *''Villain'', a 1971 novel by James Barlow *''Villain'' (Akunin 悪人), a 2010 novel by Shuichi Yoshida *''Villain'', a 2009 poetry col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Autonomic Nervous System
The autonomic nervous system (ANS), sometimes called the visceral nervous system and formerly the vegetative nervous system, is a division of the nervous system that operates viscera, internal organs, smooth muscle and glands. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, its Myocardial contractility, force of contraction, digestion, respiratory rate, pupillary dilation, pupillary response, Micturition, urination, and Animal sexual behaviour, sexual arousal. The fight-or-flight response, also known as the acute stress response, is set into action by the autonomic nervous system. The autonomic nervous system is regulated by integrated reflexes through the brainstem to the spinal cord and organ (anatomy), organs. Autonomic functions include control of respiration, heart rate, cardiac regulation (the cardiac control center), vasomotor activity (the vasomotor center), and certain reflex, reflex ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-suicidal Self-injury
Self-harm refers to intentional behaviors that cause harm to oneself. This is most commonly regarded as direct injury of one's own skin tissues, usually without suicidal intention. Other terms such as cutting, self-abuse, self-injury, and self-mutilation have been used for any self-harming behavior regardless of suicidal intent. Common forms of self-harm include damaging the skin with a sharp object or scratching with the fingernails, hitting, or burning. The exact bounds of ''self-harm'' are imprecise, but generally exclude tissue damage that occurs as an unintended side-effect of eating disorders or substance abuse, as well as more societally acceptable body modification such as tattoos and piercings. Although self-harm is by definition non-suicidal, it may still be life-threatening. People who do self-harm are more likely to die by suicide, and self-harm is found in 40–60% of suicides. Still, only a minority of those who self-harm are suicidal. The desire to self-harm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melly Oitzl
Melly S. Oitzl (in full: Maria-Silvana Oitzl, born 1955 in Lind/Arnoldstein) is an Austrian behavioral neuroscientist. She is associate professor of medical pharmacology at Leiden University and adjunct professor of cognitive neurobiology at the University of Amsterdam. Oitzl is mainly interested in the relationships between stress, cognition, and emotion. She obtained her Ph.D. with the mention magna cum laude in 1989 from the University of Düsseldorf. Oitzl is a member of the board of the Earth and Life Sciences division of the Netherlands Organisation for Scientific Research, from which she had received an "Aspasia" grant in 2008. She has been a member of the executive committee and a treasurer of the European Brain and Behaviour Society. According to the Web of Science, Oitzl has published more than 130 articles in peer-reviewed scientific journals, which have been cited over 5000 times, with an h-index The ''h''-index is an author-level metric that measures both the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scientific Control
A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable (i.e. confounding variables). This increases the reliability of the results, often through a comparison between control measurements and the other measurements. Scientific controls are a part of the scientific method. Controlled experiments Controls eliminate alternate explanations of experimental results, especially experimental errors and experimenter bias. Many controls are specific to the type of experiment being performed, as in the molecular markers used in SDS-PAGE experiments, and may simply have the purpose of ensuring that the equipment is working properly. The selection and use of proper controls to ensure that experimental results are valid (for example, absence of confounding variables) can be very difficult. Control measurements may also be used for other purposes: for example, a measurement of a microphone's background noise in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cold Pressor Test
The cold pressor test is a cardiovascular test performed by immersing the hand into an ice water container, usually for one minute, and measuring changes in blood pressure and heart rate. These changes relate to vascular response and pulse excitability. Some research suggests that the outcome of the cold pressor test can help to predict hypertension in patients; however other studies have failed to confirm this. Other measures can also be obtained from the cold pressor such as pain threshold and pain tolerance. This is done by requiring a participant to place their hand in the cold pressor for as long as they can. Once pain is present, they let the researcher know. Once the pain is unbearable, the participant removes their hand. This provides a measure of threshold (first feeling pain) and tolerance (total time minus threshold). This method is the most frequently used application of the cold pressor task. Comparable in terms of pain elicitation is the hot water immersion tes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorothea Jameson
Dorothea Jameson (November 16, 1920 – April 12, 1998) was an American cognitive psychologist who greatly contributed to the field of color and vision. She was born in Newton, Massachusetts. Jameson went to Wellesley College. She elected psychology as her major in her first year because she was "intrigued that freshmen required special permission to enroll". She graduated in 1942. While at Welleseley she volunteered as a research assistant at Harvard, where she met her future husband, Leo Hurvich. They married in 1948. Jameson was later appointed as a full professor of the University of Pennsylvania in 1972. She was awarded honorary degrees from the University of Pennsylvania in 1972 and the State University of New York in 1989. She died unexpectedly on April 12, 1998, from a previously undiagnosed lung cancer.Krantz, David H. Dorothea Jameson: A memoir. ''Color: Research & Application, 23, 6,'' 358-361. December, 1998 Vision studies While still an undergraduate at Wellesley, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leo Hurvich
Leo Maurice Hurvich (September 11, 1910 – April 25, 2009) was an American psychologist who conducted research into human color vision. He was married to fellow cognitive psychologist Dorothea Jameson. The pair collaborated on much of their work, including an elaboration on the opponent process theory. Hurvich was a member of the National Academy of Sciences and he received the APA Award for Distinguished Scientific Contributions to Psychology from the American Psychological Association. Biography Hurvich attended Harvard University, earning undergraduate and doctoral degrees. He spent several years working at Harvard before he became a researcher at Eastman Kodak. While working for Kodak, Hurvich was called before the House Un-American Activities Committee. Massachusetts Institute of Technology mathematics faculty member W. T. Martin testified that he was a former communist and he said that he thought Hurvich had been part of a circle of communists at Harvard. Hurvich asserted h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ivan Pavlov
Ivan Petrovich Pavlov (, ; 27 February 1936) was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs. Pavlov also conducted significant research on the physiology of digestion, for which he was awarded the Nobel Prize in Physiology or Medicine in 1904. Education and early life Pavlov was born the first of ten children, in Ryazan, Russian Empire. His father, Peter Dmitrievich Pavlov (1823–1899), was a village Russian Orthodox priest. His mother, Varvara Ivanovna Uspenskaya (1826–1890), was a homemaker. As a child, Pavlov willingly participated in house duties such as doing the dishes and taking care of his siblings. He loved to garden, ride his bicycle, row, swim, and play gorodki; he devoted his summer vacations to these activities. Although able to read by the age of seven, Pavlov did not begin formal schooling until he was 11 years old, due to serious injuries he had sustained ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skydivers
Parachuting and skydiving are methods of descending from a high point in an atmosphere to the ground or ocean surface with the aid of gravity, involving the control of speed during the descent using a parachute or multiple parachutes. For human skydiving, there is often a phase of free fall (the skydiving segment), where the parachute has not yet been deployed and the body gradually accelerates to terminal velocity. In cargo parachuting, the parachute descent may begin immediately, such as a parachute-airdrop in the Troposphere, lower atmosphere of Earth, or it may be significantly delayed. For example, in a planetary atmosphere, where an object is descending "under parachute" following atmospheric entry from outer space, space, may occur only after the hypersonic entry phase and initial deceleration that occurs due to aerodynamic drag, friction with the thin upper atmosphere. History The first parachute jump in history was made on 22 October 1797 by Frenchman André-Jacq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Withdrawal Symptoms
Withdrawal means "an act of taking out" and may refer to: * Anchoresis (withdrawal from the world for religious or ethical reasons) * ''Coitus interruptus'' (the withdrawal method) * Drug withdrawal * Social withdrawal * Taking of money from a bank * Water withdrawal * Withdrawal (military) * Withdrawal reflex * ''Withdrawal'', Twista Carl Terrell Mitchell (born November 27, 1973), better known by his stage name Twista (also known as Tung Twista), is an American rapper. He is best known for his Chopper (rap), chopper style of rapping and for once holding the title of fastest .../ Do or Die EP * "Withdrawals" (Tyler Farr song) See also * * {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
