Publications (34)46.43 Total impact
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Article: One's own name distorts visual space.
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ABSTRACT: Here, we demonstrated that one's own name attracts the subjective location of a visual target. We simultaneously presented observers their own name and others' name in the left and right visual fields. A target circle was presented for 53ms around the center of the display 200ms after the names disappeared. Ten observers were required to manually reproduce the target location by pointing with the mouse. The results indicated that the observers significantly mislocalized the target 1.61' on average toward the location of their own name. These observations indicated that the visual space is distorted by one's own name, which biases the spatial distribution of visual attention.Neuroscience Letters 11/2012; · 2.11 Impact Factor -
Article: The role of orientation processing in the scintillating grid illusion.
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ABSTRACT: In the scintillating grid illusion, illusory dark spots are perceived on white patches at the intersections of gray bars. Previous studies have suggested that processing related to the orientation of the bars plays a role in this illusion, but the specific underlying mechanisms are unclear. In the present study, we investigated the role of orientation processing across the intersection in generating the scintillating grid illusion. The results revealed that the illusion was attenuated when the patch was located at the intersection of short bars (Experiment 1), irrespective of the spatial distance between patches (Experiment 2). The local cruciform patterns determined the strength of the illusion, even when lateral offset of the patches was employed (Experiment 3). The illusion was observed even when a small spatial gap was introduced around the patches. A larger gap produced a weaker illusion (Experiment 4). Spatial offsets of the bars across the gapped intersection greatly reduced the illusion (Experiment 5). We discuss these findings with regard to the activity of S1-type simple cells that respond to the luminance along an oriented edge across the intersection.Attention Perception & Psychophysics 04/2012; 74(5):1020-32. · 2.04 Impact Factor -
Article: Emotional sounds influence vertical vection.
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ABSTRACT: While viewing a large vertically moving sinusoidal luminance grating, the perception of upward self-motion (vection) was modulated by positive sounds (e.g., a baby's laughter). This may be because positive emotion and the spatial metaphor of vertical directions were unified in the mind.Perception 01/2012; 41(7):875-7. · 1.31 Impact Factor -
Article: Goodness of spatial structure in Japanese rock gardens1
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ABSTRACT: In this study, we examined pattern goodness in natural scenes using stone arrangements in a Japanese rock garden. The results showed that the stone arrangement simulating the rock garden at the Ryoan-ji Temple and arrangements with a single stone deleted from that simulation were evaluated highly. These arrangements had a self-similar spatial structure, namely, covert regularity, or had simple structures in medial axis transformation. These arrangements also produced impressions of greater width and depth than other arrangements. In contrast, sector arrangements, which gave the most regular impression, were evaluated the lowest for goodness. This suggests that the pattern goodness of natural scenes or the artistic evaluation does not always correspond to overt regularity, often considered to determine pattern goodness. The most important finding is that two types of sector arrangement and two types of random arrangement were classified in their respective groups by integrated multiple impressions, although they did not have similar perceptual appearances. An intuitive judgment based on integrated impressions may allow us to notice the hidden order in spatial structures and obtain substantial understanding of the structure.Japanese Psychological Research 10/2011; 53(4):391 - 401. · 0.33 Impact Factor -
Article: [Pattern goodness and perceptual organization].
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ABSTRACT: The present study examined the relation between the manner of perceptual organization and pattern goodness. We presented regularly arranged dot patterns (Experiment 1) and randomly arranged dot patterns (Experiment 2). In both experiments, the participants were asked to evaluate the goodness of the patterns using a 7-point scale and to encircle the dots in the manner that the participants had organized them. The results for both experiments showed that patterns organized with fewer groups were rated as better than patterns organized with more groups, despite having the same structure. These results indicate that the variation in pattern goodness which is not explained by the physical structure of the pattern is explained by the manner of perceptual organization used by the observer.Shinrigaku kenkyu: The Japanese journal of psychology 08/2011; 82(3):277-82. -
Article: Temporal course of position shift for a peripheral target.
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ABSTRACT: When a target is presented near a leading cue stimulus, the perceived location of the target is displaced from the cue (attentional repulsion). On the other hand, a memorized target is sometimes mislocalized toward the cue (attentional attraction). The present study aimed at clarifying the temporal relationship between attentional repulsion and attentional attraction. We used a relative judgment task wherein observers judged whether the horizontal location of the target circle was displaced leftward or rightward from the location of a vertically separated probe disk. In Experiments 1 and 2, the stimulus-onset asynchrony (SOA) between the target and the probe was manipulated from 0 ms to 2000 ms. Repulsive and attractive position shifts were observed at short and long target-probe SOAs, respectively. In Experiment 3, we found that both the cue-target SOA and the target-probe SOA governed the repulsion and attraction in different ways. The results suggest that attentional repulsion and attentional attraction occur at different visual processing stages.Journal of Vision 01/2011; 11(6). · 3.38 Impact Factor -
Article: Cast shadow can modulate the judged final position of a moving target.
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ABSTRACT: Observers tend to localize the final position of a suddenly vanished moving target farther along in the direction of the target motion (representational momentum). We report here that such localization errors are mediated by perceived motion rather than by retinal motion. By manipulating the cast shadow of a moving target, we induced illusory motion to a target stimulus while keeping the retinal motion constant. Participants indicated the vanishing point of the target by directing a mouse cursor. The resulting magnitude of localization errors was modulated on the basis of the induced direction of the target. Such systematic localization biases were not obtained in a control condition in which the motion paths of the ball and shadow were switched. Our results suggest that cues to object motion trajectory, such as cast shadows, are used for the localization task, supporting a view that a predictive mechanism is responsible for the production of localization errors.Attention Perception & Psychophysics 10/2010; 72(7):1930-7. · 2.04 Impact Factor -
Article: Representational momentum modulated by object spin
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ABSTRACT: The present study examined whether the spin of a horizontally translating target in an animation movie modulates the magnitude of forward displacement of a remembered final position of the target. The rotation of an axis bar corresponding to the diameter of a circular target represented the target's spin. There were three spin conditions: forward, backward, and without spin. The observers had to manually localize the vanished position of the target without eye movements. Experiment 1 showed that forward displacement was larger in the forward spin condition than in the backward spin condition and also confirmed that this modulation of forward displacement by object spin was not due to observers' eye movements. Experiment 2 demonstrated that the modulation of forward displacement was not observed when horizontal translational motion was removed from the stimuli, suggesting that the interaction between the target's spin and the horizontal translational motion is critical. These results indicate that implicit friction due to object spin modulates forward displacement without the involvement of eye movements.The Japanese Journal of Psychonomic Science. 03/2010; 28(2):212-220. -
Article: The jaggy diamonds illusion.
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ABSTRACT: We report a new illusion in which the edges of diamonds placed at the intersections of grids are perceived to be jaggy (the jaggy diamonds illusion). Interestingly, the illusion disappears when the stimulus is rotated by 45 degrees, when the stimuli are observed at a close distance, and on the diamond at which the observers stare. Luminance contrast between diamonds, grids, and background is a strong determinant for this illusion.Perception 01/2010; 39(4):573-6. · 1.31 Impact Factor -
Article: The audiovisual tau effect in infancy.
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ABSTRACT: Perceived spatial intervals between successive flashes can be distorted by varying the temporal intervals between them (the "tau effect"). A previous study showed that a tau effect for visual flashes could be induced when they were accompanied by auditory beeps with varied temporal intervals (an audiovisual tau effect). We conducted two experiments to investigate whether the audiovisual tau effect occurs in infancy. Forty-eight infants aged 5-8 months took part in this study. In Experiment 1, infants were familiarized with audiovisual stimuli consisting of three pairs of two flashes and three beeps. The onsets of the first and third pairs of flashes were respectively matched to those of the first and third beeps. The onset of the second pair of flashes was separated from that of the second beep by 150 ms. Following the familiarization phase, infants were exposed to a test stimulus composed of two vertical arrays of three static flashes with different spatial intervals. We hypothesized that if the audiovisual tau effect occurred in infancy then infants would preferentially look at the flash array with spatial intervals that would be expected to be different from the perceived spatial intervals between flashes they were exposed to in the familiarization phase. The results of Experiment 1 supported this hypothesis. In Experiment 2, the first and third beeps were removed from the familiarization stimuli, resulting in the disappearance of the audiovisual tau effect. This indicates that the modulation of temporal intervals among flashes by beeps was essential for the audiovisual tau effect to occur (Experiment 2). These results suggest that the cross-modal processing that underlies the audiovisual tau effect occurs even in early infancy. In particular, the results indicate that audiovisual modulation of temporal intervals emerges by 5-8 months of age.PLoS ONE 01/2010; 5(3):e9503. · 4.09 Impact Factor -
Article: Erroneous selection of a non-target item improves subsequent target identification in rapid serial visual presentations.
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ABSTRACT: The second of two targets (T2) embedded in a rapid serial visual presentation (RSVSVP) is often missed even though the first (T1) is correctly reported (attentional blink). The rate of correct T2 identification is quite high, however, when T2 comes immediately after T1 (lag-1 sparing). This study investigated whether and how non-target items induce lag-1 sparing. One T1 and two T2s comprising letters were inserted in distractors comprising symbols in each of two synchronised RSVSVPs. A digit (dummy) was presented with T1 in another stream. Lag-1 sparing occurred even at the location where the dummy was present (Experiment 1). This distractor-induced sparing effect was also obtained even when a Japanese katakana character (Experiment 2) was used as the dummy. The sparing effect was, however, severely weakened when symbols (Experiment 3) and Hebrew letters (Experiment 4) served as the dummy. Our findings suggest a tentative hypothesis that attentional set for item nameability is meta-categorically created and adopted to the dummy only when the dummy is nameable.Advances in Cognitive Psychology 01/2010; 6:35-46. -
Article: The scintillating grid illusion: influence of size, shape, and orientation of the luminance patches.
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ABSTRACT: The scintillating grid illusion refers to the illusory perception of black spots on luminance patches at the intersections of a grey grid on a black background. We examined how spatial parameters of luminance patches modulated the strength of the illusion. In experiment 1, we controlled the size and shape of the luminance patches. For the largest-size conditions tested, we found a significant reduction in the strength of the illusion with squares when compared to circles or diamonds. In experiment 2, we controlled the orientation of quadrangle patches and confirmed a significantly larger reduction in the strength of the illusion when the edge orientations of quadrangle patches were vertical and horizontal (square) than when they were oblique (diamond). To explore the relationship between orientation processing and scintillating grid illusion, we controlled, in experiment 3, the global orientation of the display; the strength of the illusion with diamonds was significantly weaker when it was rotated by 45 degrees than when it was not rotated. These results indicate that it is not only the difference of edge orientation of luminance patches, but also the orientation with respect to the grid that determines the strength of the illusion.Perception 01/2009; 38(8):1172-82. · 1.31 Impact Factor -
Article: Dynamic gaze cueing alters the perceived direction of apparent motion
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ABSTRACT: Visual attention automatically shifts in the direction of another person's gaze shift. However, this gaze cueing effect has been tested only in static situations. In the present study, we examined whether dynamic gaze cueing, triggered by the dynamic gaze shift of another person, could alter the perceived direction of apparent motion. In Experiment 1, we presented a drifting or counterphased flickering sinusoidal grating in the upper visual field and a pictorial face stimulus with its eyes smoothly moved towards the left or right side of the grating in the lower visual field. Observers were asked to report the perceived motion direction in the grating; consequently, it was biased in the direction of the gaze shift. In Experiment 2, we ruled out the possibility of motion capture due to the motion signals in the eyes as a source of bias in the previous experiment. From these results, we concluded that dynamic gaze cueing altered perceived motion direction, and we proposed the usefulness of our approach in exploring gaze perception in dynamic environments.PSYCHOLOGIA 09/2008; 51(3):206-213. · 0.09 Impact Factor -
Article: Audiovisual tau effect.
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ABSTRACT: This study investigated how spatial intervals between successive visual flashes are influenced by the temporal intervals between auditory pure tones presented concurrently with the flashes. Three successive visual flashes defined two spatial intervals with different extents as well as two equal temporal intervals. The onsets of the first and third tones were temporally aligned with those of the first and third flashes, while the onset of the second tone was temporally offset to that of the second visual flash, resulting in shorter or longer temporal intervals between pairs of tones. Observers judged which of the first or second spatial intervals between flashes was shorter. The results showed that the shorter temporal interval between tones caused underestimation of the spatial interval between flashes. On the other hand, stimuli without the first and third tones did not result in underestimation of spatial intervals between flashes. These results indicate an audiovisual tau effect, which is triggered by a constant velocity assumption applied to moving objects defined by more than one modality.Acta Psychologica 07/2008; 128(2):249-54. · 2.26 Impact Factor -
Article: Mislocalization of a target toward subjective contours: attentional modulation of location signals.
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ABSTRACT: This study examined whether a briefly presented target was mislocalized toward a subjective contour. Observers manually reproduced the position of a briefly presented peripheral target circle above a central fixation cross. A luminance contour, a subjective contour, or a no-contour stimulus was presented in either the left of right visual field, and a no-contour control was presented in the opposite visual field. After these stimuli vanished, a target circle was then presented. Consequently, the degree of mislocalization toward the subjective and luminance contours was the same; this indicated that image integration at a coarse spatial scale cannot explain mislocalization. Experiment 2 revealed that the mislocalization in Experiment 1 was not a result of eye movements. Experiment 3 found that the spatial attention allocated at the location of the luminance and subjective contours was more than that allocated at the no-contour stimulus. An attentional shift toward the task-irrelevant stimulus resulted in a mislocalization of the target.Psychological Research 06/2008; 72(3):273-80. · 2.47 Impact Factor -
Article: New motion illusion caused by pictorial motion lines.
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ABSTRACT: Motion lines (MLs) are a pictorial technique used to represent object movement in a still picture. This study explored how MLs contribute to motion perception. In Experiment 1, we reported the creation of a motion illusion caused by MLs: random displacements of objects with MLs on each frame were perceived as unidirectional global motion along the pictorial motion direction implied by MLs. In Experiment 2, we showed that the illusory global motion in the peripheral visual field captured the perceived motion direction of random displacement of objects without MLs in the central visual field, and confirmed that the results in Experiment 1 did not stem simply from response bias, but resulted from perceptual processing. In Experiment 3, we showed that the spatial arrangement of orientation information rather than ML length is important for the illusory global motion. Our results indicate that the ML effect is based on perceptual processing rather than response bias, and that comparison of neighboring orientation components may underlie the determination of pictorial motion direction with MLs.Experimental Psychology 02/2008; 55(4):228-33. · 2.22 Impact Factor -
Article: How an abrupt onset cue can release motion-induced blindness.
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ABSTRACT: In motion-induced blindness (MIB), a target within rotating random dots is occasionally hidden from observers' consciousness during observation. In the present study, a red ring-like cue was centered on a target and presented immediately after observers reported subjective disappearance of the target in MIB (Experiment 1). The radius of the cue was systematically modulated. Observers quickly regained awareness of the disappeared object only after they were provided with a pinpoint cue of its location. We also found that a flickering cue at 1Hz hindered MIB when the radius of the cue was critically small (Experiment 2). Furthermore, abrupt onset of a small square was enough to regain awareness of the target (Experiment 3). Successful revival of the target with a small cue indicates that critical spatial distribution of visual attention determines what in the visual scene is included in visual awareness.Consciousness and Cognition 07/2007; 16(2):374-80. · 2.31 Impact Factor -
Article: Subjective disappearance of a target by flickering flankers.
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ABSTRACT: This study examined the subjective disappearance of a visual object induced by a neighboring flickering ring (Experiments 1 and 2), a set of four flickering dots (Experiment 3), and apparent motion (Experiment 4) as flickering flankers. Observers were asked to report whether a target disappeared during 10 s of stimulus presentation. We used the proportion of disappearance as a measure of performance. Interestingly, subjective disappearance was rarely observed when flickering flankers were presented with a separation of less than 0.5 degrees from the target. However, disappearance was observed when dynamic random-dot patterns were presented with a separation of less than 0.5 degrees from the target border (Experiment 5). Our results indicate that the flicker of flankers near the target disturbs target adaptation or attentional inhibition, causing persistent target representation in higher-order object selection, and resulting in non-disappearance of the target.Vision Research 04/2007; 47(7):913-8. · 2.41 Impact Factor -
Article: Memory displacement of an object with motion lines
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ABSTRACT: This study explored how motion lines (ML) can contribute to the memory displacement of an object. Three experiments were conducted to examine the memorized position of a target with ML using manual localization tasks, revealing that the reproduced position was biased in the direction implied by the ML. Two further experiments successfully ruled out the possibility that the memory displacement stemmed from a repulsive manual localization tendency, an attention repulsion-like effect, or perceptual illusory displacement of the object. These results indicated that ML trigger anticipation of the future position of the object, resulting in memory displacement.Visual Cognition 02/2007; 15(3):305-321. · 2.05 Impact Factor -
Article: Shrinkage in the apparent size of cylindrical objects.
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ABSTRACT: A novel illusion in apparent size is reported. We asked observers to estimate the width and depth of vertically oriented elliptic cylinders depicted with texture or luminance gradients (experiment 1), or the height of horizontally oriented elliptic cylinders depicted with binocular disparity (experiment 2). The estimated width or height of cylinders showed systematic shrinkage in the direction of the gradual depth change. The dissimilarity of 2-D appearance amongst our stimuli implies a large variation in spatial-frequency components and brightness contrasts, eliminating the possibility that these parameters contributed to the illusion. Also, the mechanism inappropriately triggered by pictorial depth cues (eg size scaling) may be irrelevant, because the illusion was obtained even when binocular disparity alone specified the shape of the cylinders. The illusion demonstrated here suggests that our visual system may determine the size of 3-D objects by accounting for their depth structures.Perception 02/2007; 36(1):3-16. · 1.31 Impact Factor
Top co-authors
Top Journals
Institutions
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2012
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Yamaguchi University
Yamaguchi-shi, Yamaguchi-ken, Japan
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2004–2012
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Kyushu University
- • Graduate School of Human-Environment Studies
- • Faculty of Human-Environment Studies
Fukuoka-shi, Fukuoka-ken, Japan
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2010
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University of Surrey
- School of Psychology
Guildford, ENG, United Kingdom
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2007
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Kanazawa University
- Department of Psychology
Kanazawa-shi, Ishikawa-ken, Japan
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