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Urte Roeber
Leipzig University
Stimulus (physiology)PsychologyCognitive psychologyBinocular rivalryMismatch negativity
38Publications
15H-index
798Citations
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Publications 39
Newest
#1Alie G. Male (Murdoch University)
#2Robert P. O'Shea (SCU: Southern Cross University)H-Index: 20
Last. Andreas Widmann (Leibniz Institute for Neurobiology)H-Index: 25
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Research shows that the visual system monitors the environment for changes. For example, a left-tilted bar, a deviant, that appears after several presentations of a right-tilted bar, standards, elicits a classic visual mismatch negativity (vMMN): greater negativity for deviants than standards in event-related potentials (ERPs) between 100 and 300 ms after onset of the deviant. The classic vMMN is contributed to by adaptation; it can be distinguished from the genuine vMMN that, through use of con...
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Abstract Regularities in a sequence of sounds can be automatically encoded in a predictive model by the auditory system. When a sound deviates from the one predicted by the model, a mismatch negativity (MMN) is elicited, which is taken to reflect a prediction error at a particular level of the model hierarchy. Although there are many studies on deterministic regularities, only a few have investigated the brain's ability to encode non-deterministic regularities. We studied a simple stochastic reg...
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#1Bradley N. Jack (UNSW: University of New South Wales)H-Index: 5
#2Urte RoeberH-Index: 15
Last. Robert P. O'Shea (SCU: Southern Cross University)H-Index: 20
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When dissimilar images are presented one to each eye, we do not see both images; rather, we see one at a time, alternating unpredictably. This is called binocular rivalry, and it has recently been used to study brain processes that correlate with visual consciousness, because perception changes without any change in the sensory input. Such studies have used various types of images, but the most popular have been gratings: sets of bright and dark lines of orthogonal orientations presented one to ...
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#1Robert P. O'Shea (SCU: Southern Cross University)H-Index: 20
#2Urte Roeber (Murdoch University)H-Index: 15
Last. Nicholas J. Wade (Dund.: University of Dundee)H-Index: 28
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Monocular rivalry was named by Breese in 1899. He made prolonged observation of superimposed orthogonal gratings; they fluctuated in clarity with either one or the other grating occasionally being visible alone. A year earlier, Tscherning observed similar fluctuations with a grid of vertical and horizontal lines and with other stimuli; we draw attention to his prior account. Monocular rivalry has since been shown to occur with a wide variety of superimposed patterns with several independent redi...
3 CitationsSource
#1Robert P. O'Shea (SCU: Southern Cross University)H-Index: 20
#2Urte Roeber (Murdoch University)H-Index: 15
Last. Nicholas J. Wade (Dund.: University of Dundee)H-Index: 28
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Gottfried Wilhelm Osann (1796–1866) was a German scientist most renowned for his work in chemistry and physics. However, inspired by Goethe’s work on color, he published a paper on simultaneous color contrast in 1833 using a method that is similar to that of later authors: reflection of an achromatic spot from an angled piece of glass. He wrote at least four more papers on color contrasts, in 1836 using essentially the same method as credited to others. We provide a description and translation o...
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#1Bradley N. JackH-Index: 5
#2Andreas WidmannH-Index: 25
Last. Urte RoeberH-Index: 15
view all 5 authors...
Predictive coding explains visual perception as the result of an interaction between bottom-up sensory input and top-down generative models at each level of the visual hierarchy. Evidence for this comes from the visual mismatch negativity (vMMN): a more negative ERP for rare, unpredictable visual stimuli deviants, than for frequent, predictable visual stimuli-standards. Here, we show that the vMMN does not require conscious experience. We measured the vMMN from monocular luminance-decrement devi...
3 CitationsSource
#1Bradley N. Jack (UNSW: University of New South Wales)H-Index: 5
#2Urte Roeber (SCU: Southern Cross University)H-Index: 15
Last. Robert P. O'Shea (Murdoch University)H-Index: 20
view all 3 authors...
The visual mismatch negativity (vMMN) is a negative component of event-related potentials (ERPs). It occurs when an infrequent visual stimulus, a deviant, is randomly and unpredictably presented in a sequence of frequent visual stimuli, the standards, and is thought to reflect prediction and prediction error of visual input. We investigated the sensitivity of vMMN to eye of origin (utrocular) information as well as to orientation information. We presented 80% of binocular rivalry standards (one ...
5 CitationsSource
#1Robert P. O'SheaH-Index: 20
#2Urte RoeberH-Index: 15
Last. M. Hawes
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Recently, O’Shea, Kornmeier, and Roeber, (2013, PLoS ONE) used event-­‐related potentials (ERPs) to predict the contents of visual consciousness during intermittent binocular rivalry. On each of numerous trials, they showed a first, 1000-­‐ms, rival display—a vertical grating to one eye and a horizontal grating to the other—yielding visual consciousness of one or the other grating. Then they showed a 200-­‐ms display of darkness, and then showed exactly the same gratings in a second, 1000-­‐ms, ...
#1Robert P. O'SheaH-Index: 20
#2Jürgen KornmeierH-Index: 12
Last. Urte Roeber (SCU: Southern Cross University)H-Index: 15
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Purpose: We sought brain activity that predicts visual consciousness.Methods:We used electroencephalography (EEG) to measure brain activity to a 1000-ms display of sine-wave gratings, oriented vertically in one eye and horizontally in the other. This display yields binocular rivalry: irregular alternations in visual consciousness between the images viewed by the eyes. We replaced both gratings with 200 ms of darkness, the gap, before showing a second display of the same rival gratings for anothe...
12 CitationsSource
#1Manja van Rhijn (SCU: Southern Cross University)H-Index: 1
#2Urte Roeber (SCU: Southern Cross University)H-Index: 15
Last. Robert P. O'Shea (SCU: Southern Cross University)H-Index: 20
view all 3 authors...
The visual mismatch negativity (vMMN) is a negative deflection in an event-related potential (ERP) between 200 and 400 ms after onset of an infrequent stimulus in a sequence of frequent stimuli. Binocular rivalry occurs when one image is presented to one eye and a different image is presented to the other. Although the images in the two eyes are unchanging, perception alternates unpredictably between the two images for as long as one cares to look. Binocular rivalry, therefore, provides a useful...
7 CitationsSource
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