Effect of contrast and adaptation on the perception of the direction and speed of drifting gratings

Vision Research
R Müller, M W Greenlee


Three experiments were conducted to analyse the effect of contrast and adaptation state on the ability of human observers to discriminate the motion of drifting gratings. In the first experiment, subjects judged the direction of briefly presented gratings, which slowly drifted leftward or rightward. The test gratings were enveloped in space by a raised cosine function and in time by a Gaussian. The centre of the spatial envelope was either 2 deg left or right of the fixation point. An adaptive staircase procedure was used to find the velocities, at which the observer judged the motion direction in 75% of the presentations as leftwards or rightwards, respectively. In the second experiment, subjects judged the relative speed of two simultaneously presented gratings. Stimulus contrast was varied in both experiments from 0.01 to 0.32. Discrimination threshold vs contrast functions were measured before and after adaptation to a high-contrast (0.4) grating drifting at rates between 2 and 32 Hz. In a third experiment, subjects matched, before and after adaptation, the relative speed of a test stimulus, which had a constant contrast (0.04 or 0.08) and a variable speed, to that of a reference stimulus having a variable contrast but a co...Continue Reading


Jan 1, 1976·Vision Research·H C DienerT Brandt
Aug 1, 1992·Vision Research·L S Stone, P Thompson
Jan 1, 1992·Vision Research·R J Snowden, R F Hess
Jan 1, 1991·Vision Research·J C Boulton, C L Baker
Jan 1, 1991·Vision Research·V P Ferrera, H R Wilson
Jan 1, 1989·Vision Research·G SclarD D DePriest
Jan 1, 1989·Vision Research·A M Derrington, P A Goddard
Jan 1, 1988·Vision Research·M W Greenlee, F Heitger
Jan 1, 1986·Vision Research·A Johnston, M J Wright
Jan 1, 1985·Vision Research·P Cavanagh, O E Favreau
Jan 1, 1985·Spatial Vision·M A Georgeson
Jan 1, 1985·Vision Research·S J Anderson, D C Burr
May 1, 1967·Vision Research·R Sekuler, A Pantle
Dec 6, 1968·Science·A Pantle, R Sekuler
Jan 1, 1984·Vision Research·N Hunzelmann, L Spillmann
Jan 1, 1982·Vision Research·P Thompson
Jan 1, 1981·Vision Research·A B Watson, J G Robson
May 1, 1993·Vision Research·H R Wilson, R Humanski
Feb 1, 1963·Science·R W SEKULER, L GANZ

❮ Previous
Next ❯


Feb 11, 2003·Progress in Neurobiology·C W G Clifford, M R Ibbotson
Jan 6, 2001·Neuron·R A HarrisS B Laughlin
Jun 19, 2004·Current Biology : CB·Paul V McGrawBrendan T Barrett
Feb 18, 2011·Vision Research·David Burr, Peter Thompson
Feb 8, 2014·Vision Research·Grigorios SotiropoulosPeggy Seriès
Sep 21, 2005·Vision Research·Peter ThompsonStephen T Hammett
Jul 19, 2005·Vision Research·Julian Martin Fernandez, Bart Farell
May 2, 2000·Vision Research·C W Clifford, P Wenderoth
Mar 1, 1997·Vision Research·S NishidaT Sato
Mar 1, 1996·Vision Research·P ThompsonS Swash
Oct 1, 1996·Vision Research·B R BeutterL S Stone
Sep 11, 2002·Vision Research·Felix HürlimannMatteo Carandini
Jul 24, 2001·Perception·K Brooks
Nov 10, 2005·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Vasudevan LakshminarayananRitu Khanna
Sep 18, 1997·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·J Yang, S B Stevenson
Dec 24, 2004·Journal of Neurophysiology·Li LiLeland S Stone
Apr 5, 2008·Cognitive Science·Mark A ChangiziShinsuke Shimojo

❮ Previous
Next ❯

Related Concepts

Trending Feeds


Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Hereditary Sensory Autonomic Neuropathy

Hereditary Sensory Autonomic Neuropathies are a group of inherited neurodegenerative disorders characterized clinically by loss of sensation and autonomic dysfunction. Here is the latest research on these neuropathies.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Landau-Kleffner Syndrome

Landau Kleffner syndrome (LKS), also called infantile acquired aphasia, acquired epileptic aphasia, or aphasia with convulsive disorder, is a rare childhood neurological syndrome characterized by the sudden or gradual development of aphasia (the inability to understand or express language) and an abnormal electroencephalogram. Discover the latest research on LKS here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.


Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Regulation of Vocal-Motor Plasticity

Dopaminergic projections to the basal ganglia and nucleus accumbens shape the learning and plasticity of motivated behaviors across species including the regulation of vocal-motor plasticity and performance in songbirds. Discover the latest research on the regulation of vocal-motor plasticity here.