知的生産性評価のための集中指標の提案

抄録

Recent studies have revealed that improvement of office environment may improve the intellectual productivity of office workers. However, the method which evaluates office productivity objectively and quantitatively has not been established yet. Although cognitive task performance is one of the candidate methods, it has a problem that the performance is improved not only by the improvement of office environment by but also learning effect. In this study, the authors have proposed a new productivity evaluation index, "Concentration time Ratio (CTR)" which is based on intellectual productivity model assuming 3-state transition. Aiming to confirm that CTR could cancel the learning effect and be utilized as an index of productivity evaluation, a subjective experiment was conducted where two illumination conditions were compared. In this experiment, cognitive task was given and the performance and CTR was measured for three days. As the result, it was found that CTR was not affected by the learning effect but improved by the concentration instruction to the subjects and the change of illumination condition.