A study on operational investigation and preference of electrical appliances for elder persons

The purpose of the study is to grasp operational procedure and preference of electrical appliance for elder persons. The preference of four alarm clocks which were digital or analog display was investigated as test1. The operational procedure of ATM, air-conditioner, radio-cassette recorder, electric pot and copy machine were investigated as test2. As results, we found that the preference of alarm clocks depends on their experience and elder persons can operate apparatus based on only one procedure “ input ---> adjustment ---> output” which is common procedure of products in the 1960s or 1970s in Japan..