Takehiko Yamaguchi

• Professor (Assistant) at Tokyo University of Science

Impairments in performing activities of daily living occur early in the course of Alzheimer's disease (AD). There is a great need to develop non-pharmacological therapeutic interventions likely to reduce dependency in everyday activities in AD patients. This study investigated whether it was possible to increase autonomy in these patients in cookin...

Previous research has not fully examined the effect of additional sensory feedback, particularly delivered through the haptic modality, in pointing task performance with visual distractions. This study examined the effect of haptic feedback and visual distraction on pointing task performance in a 3D virtual environment. Results indicate a strong po...

This paper describes the development of our virtual reality based rehabilitation system for children with cerebral palsy (CP). This system was designed to facilitate intrinsic motivation of CP patients for a rehabilitation exercise by integrating a gamification framework. In a previous study, we identified patient's strategy changes during the reha...

Everyday action impairment is one of the diagnostic criteria of Alzheimer's disease and is associated with many serious consequences, including loss of functional autonomy and independence. It has been shown that the (re)learning of everyday activities is possible in Alzheimer's disease by using errorless learning approaches. The purpose of this st...

In this chapter, we explored how arm movement pattern (and the related strategy) of both children with cerebral palsy (CP) and healthy children can be changed in the virtual catching task on a previously proposed rehabilitation system. We recruited 50 healthy children from elementary school and 3 children with CP as subjects to classify their arm m...

Alzheimer's disease (AD) causes impairments affecting instrumental activities of daily living (IADL). Transdisciplinary research in neuropsychology and virtual reality has fostered the development of ecologically valid virtual tools for the assessment of IADL, using simulations of real life activities. Few studies have examined the benefits of this...

We have developed a virtual reality rehabilitation system using upper-body interaction with Microsoft KinectTM. With the use of KinectTM, the system enables a patient with a full-range of avatar movements to adapt the Control/Display (C/D) ratio of a limb's position in 3D space. In this chapter, we have explored the effectiveness of C/D ratios in o...

To gain a better view of the value of haptic feedback, human performance and preference in a pointing style task in a three-dimensional virtual environment was explored. Vibration and haptic attractive force were selected as two simple cases of feedback, each with two levels. These types of feedback were compared to a no-feedback condition to bette...

Objective: To examine the "clinical utility" of a new virtual rehabilitation tool in order to treat upper-limb motor deficit in cerebral palsy (CP) patient. Methods: Single-case experimental designs. Virtual reality intervention was performed in two left unilateral spastic CP adolescent patients. The virtual reality intervention was given for 60...

We systematically investigated the overall quality of haptic user interfaces designed to support visually impaired students' science learning through sensorial feedback in order to investigate task performance and user behavior. Fourteen, 6 – 11 grade students with visual impairments recruited from a state-funded blind school were asked to perform...

Everyday action impairment is one of the diagnostic criteria of Alzheimer's disease and is associated with many serious consequences, including loss of functional autonomy and independence. It has been shown that the (re)learning of everyday activities is possible in Alzheimer's disease by using error reduction teaching approaches in naturalistic c...

Haptic technology has the potential to enhance education, especially for those with severe visual impairments (those that are blind or who have low vision), by presenting abstract concepts through the sense of touch. Despite the advances in haptic research, little research has been conducted in the area of haptic user behavior toward the establishm...

We investigated the effect of haptic cues on working memory in 3D menu selection. We conducted a 3D menu selection task in two different conditions: visual only and visual with haptic. For the visual condition, participants were instructed to select 3D menu items and memorize the order of selection. For the visual with haptic condition, we used mag...

In this study, we developed and evaluated a 10kHz high definition haptic rendering system which could display at real-time video-rate (60Hz) for general VR applications. Our proposal required both fidelity and stability in a multi-rate system, with a frequency ratio of approximately 160 times. To satisfy these two criteria, there were some problems...

This paper assesses the usability of developed haptic interface features to support future development of haptically enhanced science learning applications for students with visual impairments. Of the features developed and evaluated, three features are described in this study: Haptic Boundary, Menu Selection, and Object Recognition. Two focus grou...