The Relationship Between the Activities of Daily Living (ADL) Scale and Directional Localization Using Pointing Movements

摘要

In this paper, we aim to construct a system that measures older people's sensory, motor and cognitive functions related to spatial localization. We pay attention to motion, especially visually induced pointing moments of the arm, because it is frequently used in daily life, and because ADL (Activities of Daily Living) scales contain a number of questions relating to the ability to use one's hands. We constructed an experimental system that could measure hand pointing movements to a light spot that was displayed for 200 ms. The differences in pointing position between old people and young people were investigated. We also obtained information from a questionnaire with ADL items. The experimental data show that significant differences between the older and young groups appeared in the localization angle. The average angle that older subjects pointed at was greater than the average angle of younger subjects; older people's orientation had a tendency to shift to the outside as compared with younger people. In order to analyze individual differences among the older subjects, we defined an evaluation scale, 'IEO,' from each subject's localization angle md he 'IEO' score and ADL questionnaire score were highly correlated (0.95).