生体情報に基づく製品の使い心地評価

─MT法によるコンピュータマウスの操作感の比較─

抄録

This report concerns the development of a technique for quantitative evaluation of the ease of use experienced by users of a product. In this technique a total of 55 features per second were derived from electrocardiogram and brainwave frequency spectra and their Mahalanobis distance（MD）was calculated by the Mahalanobis-Taguchi（MT）method. The unit space on which the quantification was based was the feature pattern in the resting state; the difference between this pattern and the patterns obtained while the product was being used was quantified by their MD. This method was tested on five subjects who used a computer mouse to click on a target on a screen. MDs were calculated for varying mouse speeds and target sizes. The MD values for four of the subjects tended to match the ease of use they reported. The MD values for another one subject reflected effects of the subject’s initial unfamiliarity with the experiment.