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    Interaction Behavior of Older Adults with Immersive Virtual Reality Application for Cognitive Training
    (2018-09-11)
    Intraraprasit, Monthon
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    Sunhem, Wisuwat
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    Jinjakam, Chompoonuch
    Nowadays, older adults face health problems. The main problem is decreasing our brain skills. Memory, visuospatial skill, and cognitive functions are considered to be essence of the brain skills. These capabilities can performance by applying cognitive training or brain training. Currently, virtual reality (VR) technology is applied to cognitive training application. The results of training can be analyzed after several weeks, but it is a lack of interaction behavior analysis of older adults with VR application. The behavior analysis helps to design efficient program training, in other words, we can utilize better VR application with older adults who do not familiar with current technology. Moreover, we can understand behavior of older adult via VR application for their brain ability. VR application can be designed and kept log files for interaction behavior analysis. The algorithm for preliminary analysis is machine learning. Machine learning can predict score that measures brain's ability from the dataset. We adopted 2 models in this research. The first model is to predict the scores of visual short-term memory, called VSTM-model. The second model is to predict the scores of visuospatial skill, called VS-model. We performed baseline regression and support vector regression algorithm for score prediction of behavior. Root mean squared error is selected to measure performance of the algorithm; root mean squared error of baseline regression equal to 0.3012 in VSTM-model and 1.2427 in VS-model, and root mean squared error of support vector regression equal to 0.2876 in VSTM-model and 1.0536 in VS-model.
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    Cognitive training using immersive Virtual Reality
    (2017-12-19)
    Intraraprasit, Monthon
    ;
    Phanpanya, Phanuthon
    ;
    Jinjakam, Chompoonuch
    Normal adult becomes memory decline when increasing age. Memory decline can change from normal aging to mild cognitive impairment (MCI) and then Alzheimer's disease dementia. In order to reduce the risk of dementia, the cognitive training or brain training is needed. Cognitive training can stimulate the ability of normal person's memory for keeping ability of memory prompt when increasing age. Virtual Reality (VR) technology can be used to establish VR application for cognitive training. This paper proposes VR application for cognitive training that uses a head-mounted display for a full immersive device with VR controllers. This VR application is designed for training in visual memory and visuospatial under the psychiatrist's guidance. There were 45 participants in this experiment. All participants were tested memory ability of remember things and places from first practicing and evaluated satisfaction after using our VR application from satisfactory form. This experiment can help to determine the difficulty level in the next training and suitability of activity. The time duration of recall memory related to difficulty level in VR application (correlation coefficient, p = 0.379, 0.010). Furthermore, the satisfied evaluation of participants using VR application was 'satisfied' and 'very satisfied' in each difficulty level in VR application that Cronbach's alpha = 0.743.