Chie Takahashi

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It has been argued that hallucinations which appear to involve shifts in egocentric perspective (e.g., the out-of-body experience, OBE) reflect specific biases in exocentric perspective-taking processes. Via a newly devised perspective-taking task, we examined whether such biases in perspective-taking were present in relation to specific dissociative(More)
When integrating signals from vision and haptics the brain must solve a "correspondence problem" so that it only combines information referring to the same object. An invariant spatial rule could be used when grasping with the hand: here the two signals should only be integrated when the estimate of hand and object position coincide. Tools complicate this(More)
INTRODUCTION The current study examined the presence of cortical hyperexcitability, in nonclinical hallucinators, reporting different forms of anomalous bodily experiences (ABEs). Groups reporting visual out-of-body experiences and nonvisual sensed-presence experiences were examined. It was hypothesised that only those hallucinators whose experiences(More)
When we hold an object while looking at it, estimates from visual and haptic cues to size are combined in a statistically optimal fashion, whereby the "weight" given to each signal reflects their relative reliabilities. This allows object properties to be estimated more precisely than would otherwise be possible. Tools such as pliers and tongs(More)
Findings from neurological and clinical groups have shown that increased predisposition to anomalous experience/aura reflects an elevation in aberrant neural processes in the brain. However, studies of anomalous experiences in non-clinical/non-neurological groups are less clear on this matter and are more typically confined to subjective questionnaire(More)
In legal reasoning systems, a typical application of normative reasoning, partial information plays an important role in the representation and reasoning of legal knowledge. To construct a legal knowledge-base with partial information, many features are required of knowledge representation languages. In this paper, we discuss the representation of(More)
We evaluated an assistive control law for reaching along a mechanical guide by three individuals with brain-injury. The controller compensated for passive properties of the rum including its weight and passive tissue stiffness, as a fimction of arm configuration. We found that such " counterpoise assistance " improved the subject's active range of motion(More)
When we feel and see an object, the nervous system integrates visual and haptic information optimally, exploiting the redundancy in multiple signals to estimate properties more precisely than is possible from either signal alone. We examined whether optimal integration is similarly achieved when using articulated tools. Such tools (tongs, pliers, etc) are a(More)
INTRODUCTION Aberrations of visual experience, including visual hallucinations and visual distortions, are known to be associated with increased cortical hyperexcitability. As a consequence, the presence, intensity and frequency of certain experiences may well be indicative of an underlying increase in cortical hyperexcitability. METHODS The current study(More)
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