Psychology sidebar Psychophysics quantitatively investigates the relationship between physical stimulus physiology stimuli and the sensations and perceptions they affect. Psychophysics has been described ... book author Gescheider G year 1997 title Psychophysics the fundamentals edition 3rd publisher Lawrence ... Press ref Psychophysics also refers to a general class of methods that can be applied to study ... title Psychophysics the fundamentals edition 3rd publisher Lawrence Erlbaum Associates chapter Chapter 5 The Theory of Signal Detection isbn 080582281X ref Psychophysics has important practical applications. For example, in the study of digital signal processing psychophysics has informed the development ... Many of the classical techniques and theory of psychophysics were formulated in 1860 when Gustav ... Gustav Theodor Fechner year 1860 title Elemente der Psychophysik Elements of Psychophysics ref He coined the term psychophysics , describing research that he thought related physical stimuli to the contents ... Snodgrass JG. 1975. Psychophysics. In Experimental Sensory Psychology . B Scharf. Ed. pp. 17 67. ref ref name GescheiderChap1 cite book author Gescheider G year 1997 title Psychophysics the fundamentals ... has remained popular in applied psychophysics. Such multiple category layouts are often misnamed ... name Khaleefa cite journal author Omar Khaleefa year 1999 title Who Is the Founder of Psychophysics ... ref has argued that the medieval scientist Alhazen should be considered the founder of psychophysics ... cite journal author Aaen Stockdale, C.R. year 2008 title Ibn al Haytham and psychophysics journal Perception ... absolute ref name GescheiderChap2 cite book author Gescheider G year 1997 title Psychophysics the fundamentals ... GescheiderChap4 cite book author Gescheider G year 1997 title Psychophysics the fundamentals edition ... 080582281X ref Experimentation In psychophysics, experiments seek to determine whether the subject ... G year 1997 title Psychophysics the fundamentals edition 3rd publisher Lawrence Erlbaum Associates ... more details
Orphan date February 2009 A second order stimulus is a form of visual stimulus used in psychophysics in which objects are delineated from their backgrounds by differences of contrast vision contrast or wikt texture texture . On the contrary, a stimulus defined by differences in luminance is known as a first order stimulus . Category Psychophysics Neuroscience stub ... more details
Multiple issues citation style November 2009 one source November 2009 Psychophysics Toolbox Version 3 PTB 3 is a free set of MATLAB and GNU Octave functions for vision research. It makes it easy to synthesize and show accurately controlled visual and auditory stimuli and interact with the observer. It has at least twelve thousand active users, an active forum, and is highly cited. PTB 3 is based on the Psychophysics Toolbox Version 2 PTB 2 but its MATLAB extensions in C were rewritten to be more modular and use OpenGL. Psychophysics Toolbox Version 3 is released under the GNU GPL version 3. ref http psychtoolbox.org PsychtoolboxLicense ref References refs External links http psychtoolbox.org wikka.php?wakka HomePage Psychtoolbox home page http psychtoolbox.org wikka.php?wakka PsychtoolboxOverview User Stats See also Comparison of behavioral experiment software DEFAULTSORT Psychtoolbox Category Psychology experiments Category Psychological testing Category Neurotechnology Category Free science software ... more details
wiktionary psychophysical Psychophysical may refer to Psychophysics , the subdiscipline of psychology dealing with the relationship between physical stimuli and their subjective correlates, or percepts Psychophysiology , the branch of psychology that is concerned with the physiological bases of psychological processes Psychophysical parallelism , in philosophy, is the theory that the conscious and nervous processes vary concomitantly whether or not there be any causal connection between them disambiguation ... more details
about the psychological concept Wayne McGregor s ballet Limen ballet Wiktionary limen In physiology , psychology , or psychophysics , a limen or a liminal point is a sensory threshold threshold of a physiological or psychological response. Liminal , as an adjective, means situated at a sensory threshold, hence barely perceptible. The absolute threshold is the lowest amount of sensation detectable by a sense organ. See also Just noticeable difference Minimal negation operator Category Physiology Category Perception Med stub ... more details
Multiple issues orphan November 2006 refimprove October 2010 Lawrence M. Ward is a neuroscientist and psychophysicist at the Department of Psychology at the University of British Columbia . His interests are cognitive neuroscience of attention and consciousness with special emphasis on EEG and MEG studies of neuronal synchronization psychophysics , biophysics and general theory of stochastic resonance psychophysics and cognitive neuroscience of tinnitus neural plasticity nonlinear dynamical systems theory and its applications in cognitive neuroscience ref http www2.psych.ubc.ca lward The Psychophysics and Cognitive Neuroscience Laboratory ref . He co authored the textbook Sensation and Perception ref http www.timeshighereducation.co.uk story.asp?storyCode 160729§ioncode 30 Studies of sensation, Times Higher Education, 26 November 1999 ref with Stanley Coren , and James T. Enns, which went into six editions spanning the period 1978 to 2004. Recent publications Green, J.J., Doesburg, S.M., Ward, L.M. & McDonald, J.J. in press Electrical neuroimaging of voluntary audio spatial attention Evidence for a supramodal attention control network. Journal of Neuroscience Ward, L.M., MacLean, S.E. & Kirschner, A. 2010 . Stochastic resonance modulates neural synchronization within and between cortical sources. PLoS ONE, 5 12 , e14371 1 12 . doi 10.1371 journal.pone.0014371. Roberts, L.E., Moffat, G., Baumann, M., Ward, L.M., & Bosnyak, D.J. 2009 . Residual inhibition overlaps tinnitus spectra and the region of auditory threshold shift. Journal of the Association for Research in Otolaryngology, 9, 417 435. References references External links http www.psych.ubc.ca lward Psychophysics lab at University of British Columbia Use dmy dates date October 2010 Persondata Metadata see Wikipedia Persondata . NAME Ward, Lawrence ALTERNATIVE NAMES SHORT DESCRIPTION Neuroscientist DATE OF BIRTH PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Ward, Lawrence Category University of Br ... more details
Two alternative forced choice 2AFC and the variant Two interval forced choice 2IFC is a psychophysics psychophysical method for eliciting responses from a person about his or her experiences of a stimulus. For example, a researcher might want to measure the sensitivity of a person to dim light. On any trial, a dim light might be presented at random in the top part of a screen or in the bottom part. The person then has to choose whether the light appeared in the top or bottom. The person is allowed only to choose top or bottom he or she is not allowed to say Not sure , or I don t know , or I did not see any light . This is the sense in which the person s choice is forced. A common application is the ABX test used in subjective listening tests. Participants choose which of two options A or B is in fact X. References reflist See also Choice modelling Choice set Julian Rotter Two interval forced choice Category Psychophysics ... more details
For other uses Stimulus disambiguation In psychology , stimuli are energy patterns e.g. light or sound which are registered by the senses. In behaviorism and related stimulus response theories , stimuli constitute the basis for behavior , whereas in perceptual psychology they constitute the basis for perception . ref Stimulus . In Richard L. Gregory Ed. , The Oxford Companion to the Mind , Oxford, N.Y. Oxford University Press. ref In the second half of the 19th century, the conception had been established by psychophysics , the scientific study of the relation between stimulus and Sensation psychology sensation , ref name GescheiderpIX cite book author Gescheider, G. year 1997 title Psychophysics the fundamentals edition 3rd publisher Lawrence Erlbaum Associates page ix isbn 080582281X ref together with the notion of the reflex arc constituting a foundational concept of scientific psychology. ref name Gibson, James J. 1960 pp. 694 Gibson, James J. 1960 The Concept of the Stimulus in Psychology . American Psychologist , 15, pp. 694 703, here p.694. ref While at this time whatever could be controlled by an experimenter and applied to an observer could be thought of as a stimulus. ref name Gibson, James J. 1960 pp. 694 In the context of perception , a distinction is made between the distal stimulus the external, perceived object and the proximal stimulus the stimulation of sensory organs . ref http www.learner.org discoveringpsychology 07 e07glossary.html ref See also Psychophysics Sensory cue Stimulus physiology References reflist DEFAULTSORT Stimulus Psychology Category Behavioral concepts Psychology stub pl Bodziec psychologia ... more details
Ideal tasks arise during task analysis . Ideal tasks are different from real tasks. They are ideals in the Plato nic sense of a circle being an ideal whereas a drawn circle is flawed and real. The study of theoretically best or mathematically ideal tasks Green & Swets, 1966 , has been the basis of the branch of stimulus control in psychology called Psychophysics as well as being part of Artificial Intelligence e. g. Goel & Chandrasekaran, 1992 . Such studies include the instantiation of such ideal tasks in the real world. The notion of the ideal task has also played an important role in information theory . Tasks are defined as sequences of contingencies, each presenting stimuli and requiring an action or a sequence of actions to occur in some non arbitrary fashion. These contingencies may not only provide stimuli that require the discrimination of relations among actions and events but among task actions themselves. Again, Task actions, E, are actions that are required to complete tasks. Properties of tasks usually the stimuli, or the relationship among stimuli and actions are varied, and responses to them can be measured and analyzed. References Goel, A., & Chandrasekaran, B. 1992 . Case Based Design A Task Analysis. In C. Tong and D. Sriram editors , Artificial intelligence approaches to engineering design, Volume II Innovative design pp. 165 184 . San Diego Academic Press. Green, D. M. & Swets, J. A. 1966 . Signal Detection Theory and Psychophysics . Huntington, NY Krieger. Category Process management ... more details
wiktionarypar binaural Binaural literally means having or relating to two ears. Binaural hearing, along with frequency cues, lets humans and other animals determine direction of origin of sounds. Similar to diotic which is used in psychophysics to describe an auditory stimulus presented to both ears. Binaural may also refer to Binaural album Binaural album , by Pearl Jam Binaural beats , auditory processing artifacts Binaural recording , a method of recording audio which uses a special microphone arrangement See also Sound localization disambig de Binaural es Binaural fr Binaural it Binaural ... more details
Joseph A. Steger born 1937 was president of the University of Cincinnati from 1984 to 2003. He was succeeded by Nancy L. Zimpher . He has PhD and MS degrees from Kansas State University in Psychophysics and Statistics, and a BA from Gettysburg College in Experimental Psychology. External links http www.uc.edu president steger.html Biography from the University of Cincinnati Persondata Metadata see Wikipedia Persondata . NAME Steger, Joseph A. ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 1937 PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Steger, Joseph A. Category University of Cincinnati faculty Category Kansas State University alumni Category Gettysburg College alumni Category Presidents by university or college in the United States Steger, Joseph Category Living people Category 1937 births US academic administrator stub ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 Swept plane display is a structure from motion technique with which one can create the optical illusion of a volume of light, due to the persistence of vision property of human visual perception . The principle is to have a 2D lighted surface sweep in a circle, creating a volume. The image on the 2D surface changes as the surface rotates. The lighted surface needs to be translucent. DEFAULTSORT Swept Plane Display Category Perception Category Optical illusions Category Psychophysics Psych stub ... more details
Vision science is the science dedicated to the interdisciplinary study of visual perception and the visual system . Vision scientists study various aspects of vision from the perspectives of cognitive psychology , neuroscience , computer science , psychophysics , and ophthalmology . See also Visual neuroscience Visual perception Computer vision IOVS Linguistic relativity and the color naming debate Color vision Primary colors References Palmer, S.E. 1999 . Vision Science Photons to Phenomenology . MIT Press. ISBN 978 0262161831. External links http www.visionscience.com Vision science an internet resource for research in human and animal vision. http platform.visiome.neuroinf.jp Visiome Platform digital research resource archive for vision science by the Neuroinformatics Japan Center Category Vision Sci stub fi N k tutkimus ... more details
Unreferenced date December 2007 The interstimulus interval is the temporal interval between the offset of one stimulus physiology stimulus to the onset of another. For instance, Max Wertheimer did experiments with two stationary, flashing lights that at some interstimulus intervals appeared to the subject as moving instead of stationary. In these experiments, the ISI is simply the time between the two flashes. The term interstimulus intervals is also relevant for classical conditioning , usually denoting the time between the unconditioned stimulus food and the conditioned stimulus bell or whistle . It is particularly relevant in Eyeblink conditioning , in which it has been found that the interstimulus interval is a major factor in creating an optimal learning paradigm. Category Perception Category Psychophysics cognitive psych stub ... more details
Unreferenced date November 2006 Frank Angell was an early American psychologist. The nephew of University of Vermont and University of Michigan president, James Burrill Angell and cousin of University of Chicago psychologist and Yale University president James Rowland Angell , Frank Angell earn his PhD in the Leipzig laboratory of Wilhelm Wundt . He then founded the experimental psychology laboratories at Cornell University 1891 and Stanford University 1892 . He remained at Stanford for the rest of his career, working primarily on psychophysics and as director of athletics service for which a track stadium at Stanford was named after him . DEFAULTSORT Angell, Frank Category American psychologists Category Cornell University faculty US psychologist stub ... more details
Wiktionary Roughness may refer to Surface roughness , the roughness of a surface International Roughness Index , the roughness of a road Hydraulic roughness , the roughness of land and waterway features Roughness psychophysics Roughness in psychoacoustics refers to the level of Consonance and dissonance dissonance . The roughness of a line or surface, measured numerically by the Hausdorff dimension A typical parameter that has been used to quantify the quality of a surface topography is the surface roughness, which is represented by the arithmetic mean value, Ra, the root mean square average, Rq, and the maximum roughness height, Rt. See also Surface finish disambig uk ... more details
mergeto Absolute threshold date April 2011 Unreferenced stub auto yes date December 2009 Sensory threshold is a theoretical concept used in psychophysics . A stimulus physiology stimulus that is less intense than the sensory threshold will not elicit any sensation. Methods have been developed to measure thresholds in any of the senses. Several different sensory thresholds have been defined Absolute threshold the lowest level at which a stimulus can be detected. Recognition threshold the level at which a stimulus can not only be detected but also recognised. Just noticeable difference Differential threshold the level at which an increase in a detected stimulus can be perceived. Terminal threshold the level beyond which a stimulus is no longer detected. Aviation use . When related to motion in any of the possible six degrees of freedom 6 DoF , the fact that sensory thresholds exist is why it is essential that aircraft have blind flying instruments. Sustained flight in cloud is not possible by seat of the pants cues alone since errors build up due to aircraft movements below the pilot s sensory threshold, ultimately leading to loss of control. In flight simulators with motion platforms, the motion sensory thresholds are utilised in the technique known as acceleration onset cueing . This is where a motion platform, having made the initial acceleration that is sensed by the simulator crew, the platform is re set to approximately its neutral position by being moved at a rate below the sensory threshold and is then ready to respond to the next acceleration demanded by the simulator computer. See also Detection theory Odor detection threshold Perception Sensory analysis DEFAULTSORT Sensory Threshold Category Perception Category Psychophysics cognitive psych stub ca Llindar percepci es Umbral fr Seuil de d tection it Soglia percettiva ja sv Sensoriska tr sklar zh ... more details
Unreferenced stub date December 2009 Expert subject Psychology date February 2009 Wiktionary sensitivity The sensitivity or insensitivity of a human , often considered with regard to a particular kind of stimulation stimulus , is the strength of the feeling it results in, in comparison with the strength of the stimulus. The concept applies to physical as well as emotion al feeling. Stimulus may consist of any or all types of stimuli, including political, nationalistic, religious, physical, mental, emotional, etc. In the political sense, perception of and reaction to stimuli is often inculcated by and for the benefit of power holders. Insensitivity Not reacting to the emotions or situation of other people or not caring about others, tactless. Not reacting to something or not appreciating something. Not experiencing physical sensations, numb. See also Sense Highly sensitive person DEFAULTSORT Sensitivity Human Category Psychophysics Psychology stub ia Sensitivitate he pl Czu o testu diagnostycznego ru sr ... more details
Michael John Morgan Fellow of the Royal Society FRS born 25 August 1942 is a Welsh professor at City University, London . His area of research is the experimental psychology of vision, from neuroanatomy to perception and psychophysics . He was elected a Fellow of the Royal Society in 2005. He is married to the biologist Linda Partridge . His 2001 book The Space Between Our Ears was the first and only winner of the Wellcome Trust Book Prize before the prize was discontinued and re inaugurated in 2009 as a prize for medical writing . External links http www.staff.city.ac.uk morgan http www.icn.ucl.ac.uk Staff Lists MemberDetails.php?Title Prof&FirstName Michael&LastName Morgan Persondata Metadata see Wikipedia Persondata . NAME Morgan, Michael J. ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 25 August 1942 PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Morgan, Michael J. Category 1942 births Category Living people Category Fellows of the Royal Society wales bio stub ... more details
refimprove date September 2009 Vibratese is a method of communication through touch. It was developed by F. A. Geldard, 1957. ref Adventures in tactile literacy. Geldard, Frank A. American Psychologist . Vol 12 3 , Mar 1957, 115 124. ref It is a Somatosensory system tactile system based on both practical considerations and on results from a set of controlled Psychophysics psychophysical experiments. Vibratese was composed of 45 basic elements, the tactile equivalent of numerals and letters. The entire English alphabet and numerals 0 to 9 could be communicated this way. Geldard reported that with proper training, rates of more than 35 words per minute were possible for reading. These rates are three times that of an expert with Morse code . asof 2009 , Vibratese is no longer in use, with little literature available on the subject. References reflist refbegin http www.cim.mcgill.ca haptic pub JP CIM TR 06.pdf http cobweb.ecn.purdue.edu hongtan pubs PhDThesis tan.chap6.pdf refend Category Tactile alphabets ... more details
Orphan date January 2012 strong Orthoscopy strong used in optics and vision for the condition of normal, distortion free view, from ortho , straight, right, correct, and scope , seeing. Abbe in 1880 ref See Czapski S, Eppenstein O. eds. 1924 Grundz ge der Theorie der Optischen Instrumente nach Abbe J. Barth, Leipzig p. 658 ref designed an orthoscopic eyepiece for stereoscopic microscopes which minimized distortion. The term was also used in stereoscopy by Heine ref Heine L. 1900 ber Orthoskopie. Albrecht von Graefes Arch. Ophthalmol. , 51, 563 572 ref for the condition when the perceived depth in a stereogram is the same as that in the actual view of the scene. Such a perceptual report by an observer must be distinguished from what Moritz von Rohr called homeomorphic view, in which the depth in a stereoscopic 3D reconstruction is merely geometrically true, see Stereoscopic Depth Rendition . The difference between homeomorphic and orthoscopic is typical of the divide in psychophysics between the world of physical stimuli and the world of subjects percepts, see Fechner . References Reflist Category Eyepiece Category Stereoscopy ... more details
in relevant experiments. In addition, a distinction has been made between i local psychophysics , where stimuli are discriminated only with a certain probability, and ii global psychophysics ... in local psychophysics, whereas Stevens methods are usually applied in global psychophysics. The theory ... a constant k such that x ky . In the context of axiomatic system axiomatic psychophysics, harv Narens ... journal Perception & Psychophysics volume 62 issue 8 pages 1505 1511 citation doi 10.3758 BF03213947 ... a timing theory analysis journal Perception & Psychophysics volume 15 issue 2 pages 291 300 citation ... & Krumhansl, C. 1988 Measurement, scaling, and psychophysics. In R.C. Atkinson, R.J. Herrnstein ... Psychophysics introduction to its perceptual, neural, and social prospects , Transaction Publishers ... ratios in loudness fractionation url journal Perception & Psychophysics volume 67 issue pages 569 579 Category Perception Category Behavioral concepts Category Power laws Category Psychophysics ... more details
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