http://publicationslist.org/data/kanair/atom.xml Ryota Kanaihttp://publicationslist.org/kanair$basepathfavicon.icoRecent additions to Ryota Kanai's PublicationsList.org pagehttp://publicationslist.org/publications.png2008-02-01T17:41:28Z http://publicationslist.org/kanair/refid28 2008-02-01T17:28:36Z

When visual input is inconclusive, does previous experience aid the visual system in attaining an accurate perceptual interpretation? Prolonged viewing of a visually ambiguous stimulus causes perception to alternate between conflicting interpretations. When viewed intermittently, however, ambiguous stimuli tend to evoke the same percept on many consecutive presentations. This perceptual stabilizat...<br/><br/>Jan W Brascamp, Tomas H J Knapen, Ryota Kanai, André J Noest, Raymond van Ee, Albert V van den Berg (2008) <i>PLoS ONE</i> 3: 1 <br/>

http://publicationslist.org/kanair/refid7 2008-01-20T05:46:34Z

Motion is defined as a sequence of positional changes over time. However, in perception, spatial position and motion dynamically interact with each other. This reciprocal interaction suggests that the perception of a moving object itself may dynamically evolve following the onset of motion. Here, we show evidence that the percept of a moving object systematically changes over time. In experiments,...<br/><br/>Ryota Kanai, Bhavin R Sheth, Shinsuke Shimojo (2007) <i>Vision Res</i> <i></i> <i></i> 47: 7 937-945<br/>

http://publicationslist.org/kanair/refid12 2008-01-20T05:48:26Z

When the two eyes are presented with sufficiently different stimuli, the stimuli will engage in binocular rivalry. During binocular rivalry, a subject's perceptual state alternates between awareness of the stimulus presented to the right eye and that presented to the left eye. There are instances in which competition is not eye-based, but instead takes place between stimulus features, as is the ca...<br/><br/>Tomas Knapen, Chris Paffen, Ryota Kanai, Raymond van Ee (2007) <i>Vision Res</i> <i></i> <i></i> 47: 1 1-7<br/>

http://publicationslist.org/kanair/refid11 2008-01-20T05:48:26Z

People often fail to select and encode the second of two targets presented within less than 500ms in rapid serial visual presentation (RSVP), an effect known as the attentional blink. We investigated how report of the two targets is affected when one of them is maintained in working memory for a secondary, memory-search task. The results showed that report of either target was impaired when it was...<br/><br/>Mark R Nieuwenstein, Addie Johnson, Ryota Kanai, Sander Martens (2007) <i>Acta Psychol (Amst)</i> <i></i> <i></i> 125: 3 319-333<br/>

http://publicationslist.org/kanair/refid5 2008-01-20T05:46:34Z

After viewing directional motion, one is likely to perceive a subsequently presented directionally ambiguous motion as being in the same direction as the prior motion. The perceptual bias towards the most recent percept gradually develops as the interval between the prior stimulus and a subsequent test becomes longer. This form of positive bias, or priming, is created in an automatic fashion. It r...<br/><br/>Ryota Kanai, Tomas H J Knapen, Raymond van Ee, Frans A J Verstraten (2007) <i>Vision Res</i> <i></i> <i></i> 47: 20 2675-2683<br/>

http://publicationslist.org/kanair/refid4 2008-01-20T05:46:34Z

Colour has been shown to facilitate the recognition of scene images, but only when these images contain natural scenes, for which colour is 'diagnostic'. Here we investigate whether colour can also facilitate memory for scene images, and whether this would hold for natural scenes in particular. In the first experiment participants first studied a set of colour and greyscale natural and man-made sc...<br/><br/> Nijboer, Kanai, de Haan, van der Smagt (2007) <i>Conscious Cogn</i> <i></i> <i></i> : <br/>

http://publicationslist.org/kanair/refid1 2008-01-20T05:46:34Z

BACKGROUND: The timing at which sensory input reaches the level of conscious perception is an intriguing question still awaiting an answer. It is often assumed that both visual and auditory percepts have a modality specific processing delay and their difference determines perceptual temporal offset. METHODOLOGY/PRINCIPAL FINDINGS: Here, we show that the perception of audiovisual simultaneity can c...<br/><br/>Ryota Kanai, Bhavin R Sheth, Frans A J Verstraten, Shinsuke Shimojo (2007) <i>PLoS ONE</i> <i></i> <i></i> 2: 12 <br/>

http://publicationslist.org/kanair/refid2 2008-01-20T05:46:34Z

We show that previewing one half image of a binocular rivalry pair can cause it to gain initial dominance when the other half is added, a novel phenomenon we term flash facilitation. This is the converse of a known effect called flash suppression, where the previewed image becomes suppressed upon rivalrous presentation. The exact effect of previewing an image depends on both the duration and the c...<br/><br/>Jan W Brascamp, Tomas H J Knapen, Ryota Kanai, Raymond van Ee, Albert V van den Berg (2007) <i>J Vis</i> <i></i> <i></i> 7: 12 12.1-1212<br/>

http://publicationslist.org/kanair/refid3 2008-01-20T05:46:34Z

Visual rivalry is thought to be a distributed process that simultaneously takes place at multiple levels in the visual processing hierarchy. Also, the different types of rivalry, such as binocular and monocular rivalry, are thought to engage shared underlying mechanisms. We hypothesized that the amount of perceptual suppression during rivalry as measured by the total duration of fully exclusive pe...<br/><br/>Tomas Knapen, Ryota Kanai, Jan Brascamp, Jeroen van Boxtel, Raymond van Ee (2007) <i>Vision Res</i> <i></i> <i></i> 47: 26 3269-3275<br/>

http://publicationslist.org/kanair/refid10 2008-01-20T05:48:26Z

Attentional selection plays a critical role in conscious perception. When attention is diverted, even salient stimuli fail to reach visual awareness. Attention can be voluntarily directed to a spatial location or a visual feature for facilitating the processing of information relevant to current goals. In everyday situations, attention and awareness are tightly coupled. This has led some to sugges...<br/><br/>Ryota Kanai, Naotsugu Tsuchiya, Frans A J Verstraten (2006) <i>Curr Biol</i> <i></i> <i></i> 16: 23 2332-2336<br/>

http://publicationslist.org/kanair/refid6 2008-01-20T05:46:34Z

We report a distortion of subjective time perception in which the duration of a first interval is perceived to be longer than the succeeding interval of the same duration. The amount of time expansion depends on the onset type defining the first interval. When a stimulus appears abruptly, its duration is perceived to be longer than when it appears following a stationary array. The difference in th...<br/><br/>Ryota Kanai, Masataka Watanabe (2006) <i>Percept Psychophys</i> <i></i> <i></i> 68: 7 1113-1123<br/>

http://publicationslist.org/kanair/refid13 2008-01-20T05:48:26Z

We investigated the effects of different viewpoints on remapping visuo-motor space, and whether remapping happens differently during the planning and the online control phase of goal-directed movements. Participants tapped targets on a monitor that was placed horizontally flat and flush with the table in front of them. They viewed the layout of the scene, including the monitor, and their hand, thr...<br/><br/>Anne-Marie Brouwer, Quoc C Vuong, Ryota Kanai (2006) <i>Exp Brain Res</i> <i></i> <i></i> 175: 3 499-513<br/>

http://publicationslist.org/kanair/refid8 2008-01-20T05:48:26Z

How does the brain estimate time? This old question has led to many biological and psychological models of time perception (R. A. Block, 1989; P. Fraisse, 1963; J. Gibbon, 1977; D. L. I. Zakay, 1989). Because time cannot be directly measured at a given moment, it has been proposed that the brain estimates time based on the number of changes in an event (S. W. Brown, 1995; P. Fraisse, 1963; W. D. P...<br/><br/>Ryota Kanai, Chris L E Paffen, Hinze Hogendoorn, Frans A J Verstraten (2006) <i>J Vis</i> <i></i> <i></i> 6: 12 1421-1430<br/>

http://publicationslist.org/kanair/refid9 2008-01-20T05:48:26Z

Perceived color at a point in space is not determined simply by the color directly stimulating the corresponding retinal position. Surface color is informed by flanking edge signals, which also serve to inhibit the intrusion of signals from neighboring surfaces. Spatially continuous local interactions among color and luminance signals have been implicated in a propagation process often referred to...<br/><br/>Ryota Kanai, Daw-An Wu, Frans A J Verstraten, Shinsuke Shimojo (2006) <i>J Vis</i> <i></i> <i></i> 6: 12 1380-1395<br/>

http://publicationslist.org/kanair/refid15 2008-01-20T05:48:26Z

The position of a moving object is often mislocalised in the direction of movement. At the input stage of visual processing, the position of a moving object should still be represented veridically, whereas it should become closer to the mislocalised position at a later processing stage responsible for positional judgment. Here, we show that visual transients expose the veridical position of a movi...<br/><br/>Ryota Kanai, Frans A J Verstraten (2006) <i>Perception</i> <i></i> <i></i> 35: 4 453-460<br/>

http://publicationslist.org/kanair/refid14 2008-01-20T05:48:26Z

Perceptual priming is generally regarded as a passive and automatic process, as it is obtained even without awareness of the prime. Recent studies have introduced a more active form of perceptual priming in which priming for a subsequent ambiguous stimulus is triggered by the subjective percept, that is, interpretation of a previous ambiguous stimulus. This phenomenon known as stabilization does n...<br/><br/>Ryota Kanai, Frans A J Verstraten (2006) <i>Proc Biol Sci</i> <i></i> <i></i> 273: 1591 1217-1222<br/>

http://publicationslist.org/kanair/refid17 2008-01-20T05:48:26Z

Visual neurons show fast adaptive behavior in response to brief visual input. However, the perceptual consequences of this rapid neural adaptation are less known. Here, we show that brief exposure to a moving adaptation stimulus-ranging from tens to hundreds of milliseconds-influences the perception of a subsequently presented ambiguous motion test stimulus. Whether the ambiguous motion is perceiv...<br/><br/>Ryota Kanai, Frans A J Verstraten (2005) <i>Vision Res</i> <i></i> <i></i> 45: 25-26 3109-3116<br/>

http://publicationslist.org/kanair/refid16 2008-01-20T05:48:26Z

When our visual system is confronted with ambiguous stimuli, the perceptual interpretation spontaneously alternates between the competing incompatible interpretations. The timing of such perceptual alternations is highly stochastic and the underlying neural mechanisms are poorly understood. We show that perceptual alternations can be triggered by a transient stimulus presented nearby. The inductio...<br/><br/>Ryota Kanai, Farshad Moradi, Shinsuke Shimojo, Frans A J Verstraten (2005) <i>Perception</i> <i></i> <i></i> 34: 7 803-822<br/>

http://publicationslist.org/kanair/refid22 2008-01-20T05:48:26Z

When you see a red ball rolling across the floor, the ball's redness, roundness and motion appear to be unified and inseparably bound together as features of the ball. But neurophysiological evidence indicates that visual features such as colour, shape and motion are processed in separate regions of the brain. Here we describe an illusion that exploits this separation, causing colour and motion to...<br/><br/>Daw-An Wu, Ryota Kanai, Shinsuke Shimojo (2004) <i>Nature</i> <i></i> <i></i> 429: 6989 <br/>

http://publicationslist.org/kanair/refid23 2008-01-20T05:48:26Z

When each eye is confronted with a dissimilar stimulus, the percept will generally alternate between the two. This phenomenon is known as binocular rivalry. Although binocular rivalry occurs at locations where targets overlap spatially, the area surrounding rivalrous targets can modulate their dominance. Here we show that during binocular rivalry of oppositely moving gratings, a surrounding gratin...<br/><br/>Chris L E Paffen, Susan F te Pas, Ryota Kanai, Maarten J van der Smagt, Frans A J Verstraten (2004) <i>Vision Res</i> <i></i> <i></i> 44: 14 1635-1639<br/>

http://publicationslist.org/kanair/refid21 2008-01-20T05:48:26Z

Visual processing involves hierarchical stages in which local features are initially analyzed and subsequently grouped into objects and surfaces. In the domain of motion perception, transparent motion has been used as a powerful tool to investigate the mechanisms underlying the grouping of local features. Here, we report a novel way of creating motion transparency from oscillating dots (MTOD). In ...<br/><br/>Ryota Kanai, Chris L E Paffen, Walter Gerbino, Frans A J Verstraten (2004) <i>Vision Res</i> <i></i> <i></i> 44: 19 2207-2212<br/>

http://publicationslist.org/kanair/refid20 2008-01-20T05:48:26Z

A visual transient due to a sudden visual change is generally considered to draw our attention to a location of interest. In a series of experiments we investigated how visual transients facilitate change detection in a scene. In line with earlier reports, we found that a transient sensation has its roots in a temporal interaction at a monocular processing level. Interestingly, we also show that v...<br/><br/>Ryota Kanai, Frans A J Verstraten (2004) <i>Vision Res</i> <i></i> <i></i> 44: 19 2233-2240<br/>

http://publicationslist.org/kanair/refid18 2008-01-20T05:48:26Z

Fumiko Maeda, Ryota Kanai, Shinsuke Shimojo (2004) <i>Curr Biol</i> <i></i> <i></i> 14: 23 R990-R991<br/>

http://publicationslist.org/kanair/refid19 2008-01-20T05:48:26Z

A moving object is perceived to lie beyond a static object presented at the same time at the same retinal location (flash-lag effect or FLE). Some studies report that if the moving stimulus stops moving (flash-terminated condition or FTC) the instant the flash occurs, a FLE does not occur. Other studies, using different stimuli, report that the FLE does, in fact, occur in the FTC. The FTC is thus ...<br/><br/>Ryota Kanai, Bhavin R Sheth, Shinsuke Shimojo (2004) <i>Vision Res</i> <i></i> <i></i> 44: 22 2605-2619<br/>

http://publicationslist.org/kanair/refid25 2008-01-20T05:48:26Z

In this study, we investigated the influence of smooth-pursuit eye movements on saccade initiation in response to a sudden jump of a continuously moving target. We replicated the finding by Tanaka et al. (1998) that saccadic eye movements in the direction opposite to preceding pursuit have longer latencies than those in the same direction. We confirmed that this asymmetry is indeed due to an inhib...<br/><br/>R Kanai, J N van der Geest, M A Frens (2003) <i>Exp Brain Res</i> <i></i> <i></i> 148: 3 300-307<br/>

http://publicationslist.org/kanair/refid24 2008-01-20T05:48:26Z

After prolonged fixation, a stationary object placed in the peripheral visual field fades and disappears from our visual awareness, especially at low luminance contrast (the Troxler effect). Here, we report that similar fading can be triggered by visual transients, such as additional visual stimuli flashed near the object, apparent motion, or a brief removal of the object itself (blinking). The fa...<br/><br/>Ryota Kanai, Yukiyasu Kamitani (2003) <i>J Cogn Neurosci</i> <i></i> <i></i> 15: 5 664-672<br/>

http://publicationslist.org/kanair/refid26 2008-01-20T05:48:26Z

Johannes Van Der Steen, Ryota Kanai (2002) <i>Ann N Y Acad Sci</i> <i></i> <i></i> 956: 487-491<br/>

http://publicationslist.org/kanair/refid27 2008-01-20T05:48:26Z

Dynamic properties of horizontal vestibulo-ocular reflex (VOR) and optokinetic response (OKR) were studied in mice. The VOR was examined in the dark (VORD), in the light (VORL) and in the condition in which most of the visual field moves synchronously with the head motion (VORF). A mouse and/or a surrounding screen with vertical stripes was rotated sinusoidally, and the gain and phase of eye movem...<br/><br/>M Iwashita, R Kanai, K Funabiki, K Matsuda, T Hirano (2001) <i>Neurosci Res</i> <i></i> <i></i> 39: 3 299-311<br/>