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Topic: Psychophysics

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	The Psychophysics Psyber Lab
		Psychophysics is concerned with describing how an organism uses its sensory systems to detect events in its environment.
		One psychophysical theory, the Theory of Signal Detectability (TSD), uses a combination of statistical decision theory and the concept of the ideal observer to model an observer's sensitivity to events in its environment.
		Our main research interest is in psychophysical methodology, including measures of detectability, multi-event and multi-dimensional tasks, reducing the effects of observer inconsistency, evaluating correct and incorrect decisions (the Type 2 task), and the development of algorithms for these new methods.
	www.psychophysics.org (0 words)

	ECE511/PSY511 Psychophysics - Course Webpage (Site not responding. Last check: )
		Traditionally, psychophysics is included as an introductory part of courses on perception.
		We feel strongly that psychophysics has been, and continues to be, a multidisciplinary endeavor.
		It was thought that similar demonstrations of psychophysical paradigms would greatly facilitate student's learning.
	cobweb.ecn.purdue.edu /~ece511 (772 words)

	NationMaster - Encyclopedia: Detection theory
		Psychophysics is the branch of cognitive psychology dealing with the relationship between physical stimuli and their perception.
		In psychophysics, a just noticeable difference, customarily abbreviated with lowercase letters as jnd, is the smallest difference in a specified modality of sensory input that is detectable by a human being or other animal.
		ROC curves are used to evaluate the results of a prediction and were first employed in the study of discriminator systems for the detection of radio signals in the presence of noise in the 1940s.
	www.nationmaster.com /encyclopedia/Detection-theory (1234 words)

	Psychophysics (Site not responding. Last check: )
		Psychophysics is the branch of psychology dealing with the relationship between physical stimuli and their perception.
		While the majority of research has been done on vision, the discipline covers all the senses; papers have even been published on extrasensory perception, although more prosaic alternatives like hearing, taste, touch (including skin and enteric perception), and smell are the more prevalent.
		Psychophysics The structure of the psyche and the fundamentals of everyday psychodynamics explored using an information theory cum Quantum Mechanical model.
	www.serebella.com /encyclopedia/article-Psychophysics.html (393 words)

	shorst.psychophysics.spp97
		These three examples will illustrate the points, respectively, (1) that psychophysics deals with relationships between stimuli and "subjective" phenomenological properties, (2) that in some cases it is very much the qualitative properties of mental states that are the subject matter of psychophysics, while (3) in others, intentional properties also seem to play a major role.
		When researchers in psychophysics of perception present papers at their professional meetings, I am told, a great deal of care is lavished upon producing the best possible visuals&emdash;i.e., visuals that allow the audience to experience the effect for themselves.
		Second, the mental states that appear in psychophysics under phenomenological descriptions appear not as the posits, but as the data for theoretical psychology, and thus are not so readily subject to elimination as a consequence of theory change.
	shorst.web.wesleyan.edu /papers/shorst.psychophysics.spp97.html (3892 words)

	psychophysics - What is definition of the term - psychophysics ? (Site not responding. Last check: )
		Gustav Theodor Fechner is said to have founded psychophysics in 1860 when he published Elemente der Psychophysik, which described research relating physical stimuli with how they are perceived.
		Psychophysics usually studies stimuli which can be objectively measured, like intensity of light or loudness.
		The most common use of psychophysics is the study of perceptual correlates for various aspects of physical stimuli.
	www.linguasphere.org /dictionary/n-58301-psychophysics.html (572 words)

	Psychophysics. - Psychology - What's Been Published
		The measurement of sensation; a critique of perceptual psychophysics [by] C. Wade Savage.
		Psychophysics : introduction to its perceptual, neural, and social prospects / S.S. Stevens ; edited by Geraldine Stevens ; with a new introduction by Lawrence E. Marks.
		Psychophysical explorations of mental structures / edited by Hans-Georg Geissler, in collaboration with Martin H. Mèuller and Wolfgang Prinz.
	www.pitbossannie.com /rps-bf-psychophysics.html (313 words)

	Webvision: Psychophysics of Vision by Michael Kalloniatis OD, PhD and Charles Luu OD
		The discipline, known as psychophysics [psycho = perception and physics = physical nature of the stimulus] is an essential discipline for probing perception.
		Psychophysical methods and procedures are useful in determining threshold, including visual field analysis.
		Psychophysical procedures are used to minimise the variability in obtaining threshold by requiring subjects to commit to an answer.
	webvision.med.utah.edu /Psych1.html (0 words)

	Psychophysics
		Weber, Ernst Heinrich Weber ♦ Psychophysical, psychophysicist ♦ weber.
		"Psychophysics" is generally used as a noun (singular) -- approximately 66.67% of the time.
		"Psychophysics" is used about 3 times out of a sample of 100 million words spoken or written in English.
	www.websters-online-dictionary.org /definition/english/ps/psychophysics.html (353 words)

	Psychophysics Laboratory -- Home (Site not responding. Last check: )
		Psychophysics is the area of psychology that deals with the relationships between the physical properties of stimuli and the resulting sensations to which they give rise.
		For example, the force used in hitting a piano key will affect the intensity of the resulting tone, and consequently how loud we perceive it to be, while the choice of key determines the frequency content of the tone, and thereby our consequent perception of its pitch.
		To investigate the "psychophysical function" a psychophysist controls one or more of the physical aspects of the stimulus, and records the effects this manipulation has on the processing of that stimulus by examining the responses made by an observer.
	www.psych.auckland.ac.nz /Psych/research/psychophysics (191 words)

	The Haptic Community Web Site - Haptic Research: Psychophysics
		Psychophysics is a field of experimental psychology that uses specific behavioral methods to determine the relationship between the physical world and people's subjective experience of that world.
		With psychophysical methods, we have learned, for example, that when judging the roughness of metal gratings with different spatial periods, your perceptions turn out to be most strongly determined, not by the spatial period of the grating or by the width of the raised elements, but by the width of the spaces between these elements.
		The second function provided by psychophysics and, more generally, by the scientific study of biological touch is the set of formal experimental tools that are available for evaluating how well operators perform with the haptic interface.
	haptic.mech.northwestern.edu /Psychophysics.html (861 words)

	[No title]
		For example, the psychophysical results can be used to select appropriate physical parameters and associated values for your interface system.
		The difference between psychophysics and physiophysics is simply whether or not you are looking at the physiological changes that occur in response to a physical stimulus and that result in the psychological response.
		Someone interested in physiophysics would be interested in the physiological processes occurring within the retina and the neurons of the brain to cause the subject to report the psychological experience of the color.
	www.lycos.com /info/psychophysics.html (674 words)

	psychoceramics: Vedic Psychophysics
		Introduction to Vedic Psychophysics by Vaidix http://members.aol.com/vaidix/index.htm Modern Psychology and Veda Before we establish the Vedic theory of mind on a firm ground, we need to discuss its relation to the state of art.
		Psychophysics is looked down upon by some of the popular branches (as every new branch is), but is now gaining its importance.
		Psychophysics is real science that approaches the subject of psychology based on principles that emulate physics to the world of thought.
	dev.null.org /psychoceramics/archives/1997.11/msg00031.html (1934 words)

	ScienceDaily: Psychophysics (Site not responding. Last check: )
		Psychophysics is an interdisciplinary field occupying the intersection between cognitive psychology and experimental psychology and dealing with the relationship between physical stimuli and their perception.
		Psychophysics -- Psychophysics is an interdisciplinary field occupying the intersection between cognitive psychology and experimental psychology and dealing with the relationship between physical stimuli and their...
		Psychopathology -- Psychopathology is a term which refers to either the study of mental illness or mental distress or the manifestation of behaviours and experiences which may be indicative of mental illness or...
	www.sciencedaily.com /encyclopedia/psychophysics (1481 words)

	Classics in the History of Psychology -- Introduction to Fechner (1860) by R. H. Wozniak
		Here he described three probabilistic methods for the collection of psychophysical data, marshaled a great deal of evidence in support of the existence of a logarithmic relationship between the intensity of sensation and the intensity of the stimulus, and spelled out the basic assumptions of psychophysics.
		The goal of psychophysics was not, of course, the measurement of specific sensations but the development of a general law for the functional relationship between the psychical and the physical.
		In developing psychophysics, Fechner had succeeded, at least to his own satisfaction, in specifying the functional relationship between the intensity of sensation, the psychophysical unity viewed from the mental side, and the intensity of the stimulus, the psychophysical unity viewed from the material side.
	psychclassics.yorku.ca /Fechner/wozniak.htm (0 words)

	Psychophysics
		When requested, the students should be able demonstrate they know what psychophysics is and what is tells us about the brain.
		The should understand the methods of psychophysics and the contributions of the early psychophysicists.
		A. The instructor begins by asking why we would be interested in knowing about the relationship between the physical world and the mental world.
	www.uni.edu /~maclino/hs/lesson_plans/psychophysics_LP.html (0 words)

	What is psychophysics? (Site not responding. Last check: )
		"Psychophysics is commonly defined as the quantitative branch of the study of perception, examining the relations between observed stimuli and responses and the reasons for those relations.
		Since its inception, psychophysics has been based on the assumption that the human perceptual system is a measureing instrument yielding results (experiences, judgments, responses) that may be systematically analyzed.
		'Psychophysical Methods' by Walter Ehrenstein and Addie Ehrenstein gives a description of Fechner’s techniques and details those extensions and modifications of psychophysical methods that may be helpful to the modern neuroscientist (opens in PDF format).
	www.psy.ulaval.ca /~isp/history/explanation.htm (233 words)

	Webvision: Psychophysics of Vision by Michael Kalloniatis OD, PhD and Charles Luu OD
		The discipline, known as psychophysics [psycho = perception and physics = physical nature of the stimulus] is an essential discipline for probing perception.
		Psychophysical methods and procedures are useful in determining threshold, including visual field analysis.
		Psychophysical procedures are used to minimise the variability in obtaining threshold by requiring subjects to commit to an answer.
	www.webvision.med.utah.edu /Psych1.html (4733 words)

	Definition of Psychophysics (Site not responding. Last check: )
		Psychophysics is the scientific study of the relationship between stimuli (specified in physical terms) and the sensations and perceptions evoked by these stimuli.
		The term psychophysics is used to denote both the substantive study of stimulus-response relationships and the methodologies used for this study.
		In the Munsell Lab we use psychophysics for a variety of different purposes.
	www.cis.rit.edu /people/faculty/montag/vandplite/pages/chap_1/ch1p2.html (147 words)

	[No title] (Site not responding. Last check: )
		Interactions among these visual filters forms the basis of studies of crowding and the integration of spatial structure in peripheral visual field in normal-vision and low-vision observers and in amblyopic and dyslexic individuals.
		A major challenge in doing psychophysics on modern personal computers is that operating systems are becoming more and more aggressive about stealing time away from your display code to do other things.
		Understanding segmentation and motion transparency. In the psychophysical laboratory and in real life scenes, one may come across surprising situations in which two different directions of motion appear within the same patch of the visual field.
	www.lycos.com /info/psychophysics--miscellaneous.html (507 words)

	Psychophysics (Site not responding. Last check: )
		One of the places psychology started was in the field of psychophysics.
		Psychophysics is the attempt to find the physics of the body.
		Modern psychophysical research has generally abandoned the Weber-Fechner law, and instead uses a Power Law, a log-log relationship between stimulation and perception that yields straight lines.
	www.peace.saumag.edu /faculty/Kardas/Courses/GPWeiten/C4SandP/Psychophysics.html (397 words)

	The psychophysics of taste from the entropy of the stimulus. Kenneth H. Norwich, 1984.
		In the author's previous publications (Norwich, 1977, 1981a, 1983b), it was shown that many of these seemingly disjoint, empirical rules could be demonstrated to be specific instances of one general principle, that of reduction of uncertainty during the process of perceiving a steady stimulus.
		The use of the entropy equation 5, 13 to govern both the neural and psychophysical adaptation processes is justified by the work of Borg et al.
		The psychophysical laws we have treated deal with the resolution of uncertainty (by which is meant the gain of information), a process that has been modeled for a steady stimulus by Equations 1 and 2.
	www.biopsychology.org /norwich/n1984/norwich1984.htm (5366 words)

	Psychophysics Laboratory -- About Us (Site not responding. Last check: )
		Psychophysics Laboratory -- About Us The University of Auckland is situated in the heart of New Zealand's biggest (but not capital) city Auckland.
		The Psychophysics Laboratory is situated on the third floor of the Human Sciences Building.
		Under John Irwin, the psychophysics laboratory came to specialise in auditory psychophysics, although experiments involving vision, taste, and pain have also featured.
	www.psych.auckland.ac.nz /psych/research/psychophysics/pages/about.htm (419 words)

	Experiments in Nonlinear Psychophysics
		Psychophysics, the study of human responses to physical stimulation, was dominated first by Fechner's logarithmic law, and then by Stevens' power law.
		Most impressively, Robert Gregson has developed a non-linear psychophysical function he calls the "gamma recursion" and has conducted many computer simulations of psychophysical phenomena using the model.
		In accordance with Gregson, I conclude that the gamma recursion is a viable tool for studying the nonlinearity underlying human psychophysical responses.
	www.goertzel.org /dynapsyc/1996/takuo.html (2488 words)

	Postgraduate Diploma of Clinical Psychophysics - Academy of Human Sciences
		This intensive course of 40 hours of lectures, practical work, experimentation, examination and discovery is structured so as to help you to achieve a professional standard of Clinical Psychophysics and clinical practice.
		However practical application of the techniques in a professional manner is all important and for the most part the course is structured for a “hands on” development of your expertise.
		You will have 2 Saturdays as well as before and after class each day to enjoy some of the beautiful scenery, but keep in mind that this is an intensive course requiring after hours study and practice.
	www.humansciences.net.au /courses/PostgraduateDiplomaofClinicalPsychophysics/content.htm (1272 words)

	Alibris: Psychophysics
		It captures the fundamental themes of Stevens's research and his vision of what psychophysics and psychology are and can be.
		This is an accessible, well-written and well-illustrated account of the study of interplay between physiology and behavior.
		Yet, despite a healthy resurgence in Mach studies, he is still widely thought to represent a simplistic positivist, even sensationalist, position that does not at all reflect the depth of Mach's interests and subtlety...
	www.alibris.com /search/books/subject/Psychophysics (671 words)

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