The Experts below are selected from a list of 26922 Experts worldwide ranked by ideXlab platform
Katsumi Watanabe - One of the best experts on this subject based on the ideXlab platform.
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a transient Auditory Signal shifts the perceived offset position of a moving visual object
Frontiers in Psychology, 2013Co-Authors: Sungen Chien, Katsumi WatanabeAbstract:Information received from different sensory modalities profoundly influences human perception. For example, changes in the Auditory flutter rate induce changes in the apparent flicker rate of a flashing light (Shipley, 1964). In the present study, we investigated whether Auditory information would affect the perceived offset position of a moving object. In Experiment 1, a visual object moved toward the center of the computer screen and disappeared abruptly. A transient Auditory Signal was presented at different times relative to the moment when the object disappeared. The results showed that if the Auditory Signal was presented before the abrupt offset of the moving object, the perceived final position was shifted backward, implying that the perceived offset position was affected by the transient Auditory information. In Experiment 2, we presented the transient Auditory Signal to either the left or the right ear. The results showed that the perceived offset shifted backward more strongly when the Auditory Signal was presented to the same side from which the moving object originated. In Experiment 3, we found that the perceived timing of the visual offset was not affected by the spatial relation between the Auditory Signal and the visual offset. The present results are interpreted as indicating that an Auditory Signal may influence the offset position of a moving object through both spatial and temporal processes.
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A transient Auditory Signal shifts the perceived offset position of a moving visual object.
Frontiers in psychology, 2013Co-Authors: Sungen Chien, Fuminori Ono, Katsumi WatanabeAbstract:Information received from different sensory modalities profoundly influences human perception. For example, changes in the Auditory flutter rate induce changes in the apparent flicker rate of a flashing light (Shipley, 1964). In the present study, we investigated whether Auditory information would affect the perceived offset position of a moving object. In Experiment 1, a visual object moved toward the center of the computer screen and disappeared abruptly. A transient Auditory Signal was presented at different times relative to the moment when the object disappeared. The results showed that if the Auditory Signal was presented before the abrupt offset of the moving object, the perceived final position was shifted backward, implying that the perceived offset position was affected by the transient Auditory information. In Experiment 2, we presented the transient Auditory Signal to either the left or the right ear. The results showed that the perceived offset shifted backward more strongly when the Auditory Signal was presented to the same side from which the moving object originated. In Experiment 3, we found that the perceived timing of the visual offset was not affected by the spatial relation between the Auditory Signal and the visual offset. The present results are interpreted as indicating that an Auditory Signal may influence the offset position of a moving object through both spatial and temporal processes.
Sungen Chien - One of the best experts on this subject based on the ideXlab platform.
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a transient Auditory Signal shifts the perceived offset position of a moving visual object
Frontiers in Psychology, 2013Co-Authors: Sungen Chien, Katsumi WatanabeAbstract:Information received from different sensory modalities profoundly influences human perception. For example, changes in the Auditory flutter rate induce changes in the apparent flicker rate of a flashing light (Shipley, 1964). In the present study, we investigated whether Auditory information would affect the perceived offset position of a moving object. In Experiment 1, a visual object moved toward the center of the computer screen and disappeared abruptly. A transient Auditory Signal was presented at different times relative to the moment when the object disappeared. The results showed that if the Auditory Signal was presented before the abrupt offset of the moving object, the perceived final position was shifted backward, implying that the perceived offset position was affected by the transient Auditory information. In Experiment 2, we presented the transient Auditory Signal to either the left or the right ear. The results showed that the perceived offset shifted backward more strongly when the Auditory Signal was presented to the same side from which the moving object originated. In Experiment 3, we found that the perceived timing of the visual offset was not affected by the spatial relation between the Auditory Signal and the visual offset. The present results are interpreted as indicating that an Auditory Signal may influence the offset position of a moving object through both spatial and temporal processes.
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A transient Auditory Signal shifts the perceived offset position of a moving visual object.
Frontiers in psychology, 2013Co-Authors: Sungen Chien, Fuminori Ono, Katsumi WatanabeAbstract:Information received from different sensory modalities profoundly influences human perception. For example, changes in the Auditory flutter rate induce changes in the apparent flicker rate of a flashing light (Shipley, 1964). In the present study, we investigated whether Auditory information would affect the perceived offset position of a moving object. In Experiment 1, a visual object moved toward the center of the computer screen and disappeared abruptly. A transient Auditory Signal was presented at different times relative to the moment when the object disappeared. The results showed that if the Auditory Signal was presented before the abrupt offset of the moving object, the perceived final position was shifted backward, implying that the perceived offset position was affected by the transient Auditory information. In Experiment 2, we presented the transient Auditory Signal to either the left or the right ear. The results showed that the perceived offset shifted backward more strongly when the Auditory Signal was presented to the same side from which the moving object originated. In Experiment 3, we found that the perceived timing of the visual offset was not affected by the spatial relation between the Auditory Signal and the visual offset. The present results are interpreted as indicating that an Auditory Signal may influence the offset position of a moving object through both spatial and temporal processes.
Ganesan Venkatasubramanian - One of the best experts on this subject based on the ideXlab platform.
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Auditory false perception in schizophrenia: Development and validation of Auditory Signal detection task
Asian journal of psychiatry, 2016Co-Authors: Harleen Chhabra, Selvaraj Sowmya, Vanteemar S. Sreeraj, Sunil V. Kalmady, Venkataram Shivakumar, Anekal C. Amaresha, Janardhanan C. Narayanaswamy, Ganesan VenkatasubramanianAbstract:Auditory hallucinations constitute an important symptom component in 70-80% of schizophrenia patients. These hallucinations are proposed to occur due to an imbalance between perceptual expectation and external input, resulting in attachment of meaning to abstract noises; Signal detection theory has been proposed to explain these phenomena. In this study, we describe the development of an Auditory Signal detection task using a carefully chosen set of English words that could be tested successfully in schizophrenia patients coming from varying linguistic, cultural and social backgrounds. Schizophrenia patients with significant Auditory hallucinations (N=15) and healthy controls (N=15) performed the Auditory Signal detection task wherein they were instructed to differentiate between a 5-s burst of plain white noise and voiced-noise. The analysis showed that false alarms (p=0.02), discriminability index (p=0.001) and decision bias (p=0.004) were significantly different between the two groups. There was a significant negative correlation between false alarm rate and decision bias. These findings extend further support for impaired perceptual expectation system in schizophrenia patients.
Harleen Chhabra - One of the best experts on this subject based on the ideXlab platform.
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Auditory false perception in schizophrenia: Development and validation of Auditory Signal detection task
Asian journal of psychiatry, 2016Co-Authors: Harleen Chhabra, Selvaraj Sowmya, Vanteemar S. Sreeraj, Sunil V. Kalmady, Venkataram Shivakumar, Anekal C. Amaresha, Janardhanan C. Narayanaswamy, Ganesan VenkatasubramanianAbstract:Auditory hallucinations constitute an important symptom component in 70-80% of schizophrenia patients. These hallucinations are proposed to occur due to an imbalance between perceptual expectation and external input, resulting in attachment of meaning to abstract noises; Signal detection theory has been proposed to explain these phenomena. In this study, we describe the development of an Auditory Signal detection task using a carefully chosen set of English words that could be tested successfully in schizophrenia patients coming from varying linguistic, cultural and social backgrounds. Schizophrenia patients with significant Auditory hallucinations (N=15) and healthy controls (N=15) performed the Auditory Signal detection task wherein they were instructed to differentiate between a 5-s burst of plain white noise and voiced-noise. The analysis showed that false alarms (p=0.02), discriminability index (p=0.001) and decision bias (p=0.004) were significantly different between the two groups. There was a significant negative correlation between false alarm rate and decision bias. These findings extend further support for impaired perceptual expectation system in schizophrenia patients.
Elliot D. Freeman - One of the best experts on this subject based on the ideXlab platform.
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A deafening flash! Visual interference of Auditory Signal detection.
Consciousness and cognition, 2017Co-Authors: Christopher Fassnidge, Claudia Cecconi Marcotti, Elliot D. FreemanAbstract:In some people, visual stimulation evokes Auditory sensations. How prevalent and how perceptually real is this? 22% of our neurotypical adult participants responded ‘Yes' when asked whether they heard faint sounds accompanying flash stimuli, and showed significantly better ability to discriminate visual ‘Morse-code’ sequences. This benefit might arise from an ability to recode visual Signals as sounds, thus taking advantage of superior temporal acuity of audition. In support of this, those who showed better visual relative to Auditory sequence discrimination also had poorer Auditory detection in the presence of uninformative visual flashes, though this was independent of awareness of visually-evoked sounds. Thus a visually-evoked Auditory representation may occur subliminally and disrupt detection of real Auditory Signals. The frequent natural correlation between visual and Auditory stimuli might explain the surprising prevalence of this phenomenon. Overall, our results suggest that learned correspondences between strongly correlated modalities may provide a precursor for some synaesthetic abilities.