Katzner, Steffen

[["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Journal of Vision"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Katzner, S."],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Busse, L."],["dc.date.accessioned","2017-09-07T11:43:34Z"],["dc.date.available","2017-09-07T11:43:34Z"],["dc.date.issued","2012"],["dc.description.abstract","One of the key features of active perception is the ability to predict critical sensory events. Humans and animals can implicitly learn statistical regularities in the timing of events and use them to improve behavioral performance. Here, we used a signal detection approach to investigate whether such improvements in performance result from changes of perceptual sensitivity or rather from adjustments of a response criterion. In a regular sequence of briefly presented stimuli, human observers performed a noise-limited motion detection task by monitoring the stimulus stream for the appearance of a designated target direction. We manipulated target predictability through the hazard rate, which specifies the likelihood that a target is about to occur, given it has not occurred so far. Analyses of response accuracy revealed that improvements in performance could be accounted for by adjustments of the response criterion; a growing hazard rate was paralleled by an increasing tendency to report the presence of a target. In contrast, the hazard rate did not affect perceptual sensitivity. Consistent with previous research, we also found that reaction time decreases as the hazard rate grows. A simple rise-to-threshold model could well describe this decrease and attribute predictability effects to threshold adjustments rather than changes in information supply. We conclude that, even under conditions of full attention and constant perceptual sensitivity, behavioral performance can be optimized by dynamically adjusting the response criterion to meet ongoing changes in the likelihood of a target."],["dc.identifier.doi","10.1167/12.10.1"],["dc.identifier.gro","3151579"],["dc.identifier.pmid","22949481"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8390"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1534-7362"],["dc.title","Improving behavioral performance under full attention by adjusting response criteria to changes in stimulus predictability"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","451"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","Trends in Cognitive Sciences"],["dc.bibliographiccitation.lastpage","453"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Katzner, Steffen"],["dc.date.accessioned","2017-09-07T11:43:36Z"],["dc.date.available","2017-09-07T11:43:36Z"],["dc.date.issued","2007"],["dc.description.abstract","A recent report by Wannig et al. demonstrated the effects of selectively attending to individual surfaces in transparent motion patterns on neurons in the middle temporal area of awake, behaving monkeys. The study illustrates a highly adaptive and flexible attentional modulation of sensory responses."],["dc.identifier.doi","10.1016/j.tics.2007.08.012"],["dc.identifier.gro","3151585"],["dc.identifier.pmid","17980646"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8397"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1364-6613"],["dc.title","Visual attention: of features and transparent surfaces"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","7"],["dc.bibliographiccitation.firstpage","269"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Journal of Vision"],["dc.bibliographiccitation.lastpage","284"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Katzner, Steffen"],["dc.contributor.author","Busse, Laura"],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2017-09-07T11:43:39Z"],["dc.date.available","2017-09-07T11:43:39Z"],["dc.date.issued","2006"],["dc.description.abstract","In four variants of a speeded target detection task, we investigated the processing of color and motion signals in the human visual system. Participants were required to attend to both a particular color and direction of motion in moving random dot patterns (RDPs) and to report the appearance of the designated targets. Throughout, reaction times (RTs) to simultaneous presentations of color and direction targets were too fast to be reconciled with models proposing separate and independent processing of such stimulus dimensions. Thus, the data provide behavioral evidence for an integration of color and motion signals. This integration occurred even across superimposed surfaces in a transparent motion stimulus and also across spatial locations, arguing against object- and location-based accounts of attentional selection in such a task. Overall, the pattern of results can be best explained by feature-based mechanisms of visual attention."],["dc.identifier.doi","10.1167/6.3.7"],["dc.identifier.gro","3151596"],["dc.identifier.pmid","16643095"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8409"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1534-7362"],["dc.title","Feature-based attentional integration of color and visual motion"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2019"],["dc.bibliographiccitation.issue","13"],["dc.bibliographiccitation.journal","Vision Research"],["dc.bibliographiccitation.lastpage","2027"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Busse, Laura"],["dc.contributor.author","Katzner, Steffen"],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2017-09-07T11:43:33Z"],["dc.date.available","2017-09-07T11:43:33Z"],["dc.date.issued","2006"],["dc.description.abstract","In two experiments, we investigated the effects of exogenous cueing on visual motion processing. The first experiment shows that the typical pattern of reaction time (RT) effects, namely early facilitation and later inhibition of return (IOR), can be obtained using a color change as exogenous cue and a direction change as target. In the second experiment, we manipulated the validity of the cue independently with respect to location and feature using transparent motion stimuli. Facilitation of RTs with short cue-target interstimulus-intervals (ISIs) was only evident for targets with both the valid location and the valid feature. Furthermore, at longer cue-target intervals, RTs were prolonged for targets at the cued location, irrespective of the cued feature. These results demonstrate spatial and feature-based components of early facilitation and purely spatial IOR."],["dc.identifier.doi","10.1016/j.visres.2005.12.016"],["dc.identifier.gro","3151577"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8388"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0042-6989"],["dc.title","Spatial and feature-based effects of exogenous cueing on visual motion processing"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","16380"],["dc.bibliographiccitation.issue","42"],["dc.bibliographiccitation.journal","PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA"],["dc.bibliographiccitation.lastpage","16385"],["dc.bibliographiccitation.volume","105"],["dc.contributor.author","Busse, Laura"],["dc.contributor.author","Katzner, Steffen"],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2018-11-07T11:09:59Z"],["dc.date.available","2018-11-07T11:09:59Z"],["dc.date.issued","2008"],["dc.description.abstract","Dynamically shifting attention between behaviorally relevant stimuli in the environment is a key condition for successful adaptive behavior. Here, we investigated how exogenous (reflexive) and endogenous (voluntary) shifts of visual spatial attention interact to modulate activity of single neurons in extrastriate area MT. We used a double-cueing paradigm, in which the first cue instructed two macaque monkeys to covertly attend to one of three moving random dot patterns until a second cue, whose unpredictable onset exogenously captured attention, either Signaled to shift or maintain the current focus of attention. The neuronal activity revealed correlates of both exogenous and endogenous attention, which could be well distinguished by their characteristic temporal dynamics. The earliest effect was a transient interruption of the focus of endogenous attention by the onset of the second cue. The neuronal signature of this exogenous capture of attention was a short-latency decrease of responses to the stimulus attended so far. About 70 ms later, the influence of exogenous attention leveled off, which was reflected in two concurrent processes: responses to the newly cued stimulus continuously increased because of allocation of endogenous attention, while, surprisingly, there was also a gradual rebound of attentional enhancement of the previously relevant stimulus. Only after an additional 110 ms did endogenous disengagement of attention from this previously relevant stimulus become evident. These patterns of attentional modulation can be most parsimoniously explained by assuming two distinct attentional mechanisms drawing on the same capacity-limited system, with exogenous attention having a much faster time course than endogenous attention."],["dc.identifier.doi","10.1073/pnas.0707369105"],["dc.identifier.isi","000260597400056"],["dc.identifier.pmid","18922778"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/53118"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Natl Acad Sciences"],["dc.relation.issn","0027-8424"],["dc.title","Temporal dynamics of neuronal modulation during exogenous and endogenous shifts of visual attention in macaque area MT"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Treue, Stefan"],["dc.contributor.author","Katzner, S."],["dc.contributor.editor","Squire, Larry R."],["dc.date.accessioned","2017-09-07T11:43:42Z"],["dc.date.available","2017-09-07T11:43:42Z"],["dc.date.issued","2009"],["dc.description.abstract","This article reviews neuronal correlates of selective visual attention emphasizing neurophysiological studies in nonhuman primates. We discuss the effects of directing attention to spatial locations, nonspatial stimulus features, or visual objects on sensory information processing. Furthermore, we describe multiplicative and nonmultiplicative influences of attention on neuronal tuning curves. Finally, we relate the effects of attention to increases in stimulus contrast, both on a neuronal and behavioral level. We propose that attention creates an integrated saliency map, that is, a topographic representation of relative stimulus strength and behavioral relevance across visual space."],["dc.identifier.doi","10.1016/b978-008045046-9.00242-4"],["dc.identifier.gro","3151604"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8417"],["dc.language.iso","en"],["dc.notes.status","public"],["dc.notes.submitter","chake"],["dc.publisher","Elsevier"],["dc.relation.isbn","978-0-08045-046-9"],["dc.relation.ispartof","Encyclopedia of Neuroscience"],["dc.title","Visual Attention"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Journal of Vision"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Busse, Laura"],["dc.contributor.author","Katzner, Steffen"],["dc.contributor.author","Tillmann, Christine"],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2017-09-07T11:43:37Z"],["dc.date.available","2017-09-07T11:43:37Z"],["dc.date.issued","2008"],["dc.description.abstract","In sensory neurophysiology, reverse correlation analyses have advanced our understanding of the spatio-temporal structure of receptive fields (RFs) and the tuning properties of individual neurons. Here, we used a psychophysical variant of the motion reverse correlation technique to investigate how visual selective attention influences human perceptual tuning curves for direction of motion. Direction tuning functions were computed by reverse correlating speeded target-present responses of human observers with a random sequence of brief, fully coherent motion impulses. We found that attention enhanced the amplitude of perceptual tuning curves for direction of motion, while tuning width remained unaffected. Furthermore, the full direction tuning profile across time could be well fitted by a separable model of direction and temporal tuning. Attention enhanced both the direction tuning and its temporal profile, without shifts or changes in shape. Thus, attention exerts a multiplicative effect on human perceptual tuning curves for direction of motion. An analysis of second-order correlations revealed a boost in the likelihood of responses to the target direction when it was followed by a motion impulse in the opposite direction. This perceptual effect might be mediated by biphasic neurons that are preferentially activated by a rapid succession of opposite motion directions."],["dc.identifier.doi","10.1167/8.9.2"],["dc.identifier.gro","3151590"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8402"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1534-7362"],["dc.title","Effects of attention on perceptual direction tuning curves in the human visual system"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","12"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Frontiers in Systems Neuroscience"],["dc.bibliographiccitation.lastpage","8"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Katzner, Steffen"],["dc.contributor.author","Busse, Laura"],["dc.contributor.author","Treue, Stefan"],["dc.date.accessioned","2017-09-07T11:43:32Z"],["dc.date.available","2017-09-07T11:43:32Z"],["dc.date.issued","2009"],["dc.description.abstract","Directing visual attention to spatial locations or to non-spatial stimulus features can strongly modulate responses of individual cortical sensory neurons. Effects of attention typically vary in magnitude, not only between visual cortical areas but also between individual neurons from the same area. Here, we investigate whether the size of attentional effects depends on the match between the tuning properties of the recorded neuron and the perceptual task at hand. We recorded extracellular responses from individual direction-selective neurons in the middle temporal area (MT) of rhesus monkeys trained to attend either to the color or the motion signal of a moving stimulus. We found that effects of spatial and feature-based attention in MT, which are typically observed in tasks allocating attention to motion, were very similar even when attention was directed to the color of the stimulus. We conclude that attentional modulation can occur in extrastriate cortex, even under conditions without a match between the tuning properties of the recorded neuron and the perceptual task at hand. Our data are consistent with theories of object-based attention describing a transfer of attention from relevant to irrelevant features, within the attended object and across the visual field. These results argue for a unified attentional system that modulates responses to a stimulus across cortical areas, even if a given area is specialized for processing task-irrelevant aspects of that stimulus."],["dc.identifier.doi","10.3389/neuro.06.012.2009"],["dc.identifier.gro","3151570"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8380"],["dc.language.iso","en"],["dc.notes.intern","DeepGreen Import"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.publisher","Frontiers Research Foundation"],["dc.relation.eissn","1662-5137"],["dc.relation.issn","1662-5137"],["dc.rights","http://www.frontiersin.org/licenseagreement"],["dc.title","Attention to the color of a moving stimulus modulates motion-signal processing in macaque area MT"],["dc.title.subtitle","evidence for a unified attentional system"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]