スマートフォンを利用したVisual Analog Scale の実施について : Ecological Momentary Assessment に向けた入力端末の違いによる評価値への影響の検討

Abstract

We examined that tablet computer and smartphone could use as a tool to Ecological Momentary Assessment. We adopted Visual analog scale (VAS) as a scale of EMA. Generally, a straight line of 100 mm is used when we perform VAS. In this study, we examined the error with the value to be obtained in normal VAS and short VAS and examined the reliability of the input to short VAS. 20 young women input mood at that time in order of paper VAS, iPad, a smartphone at the point of at 10:00, 12:00 and 15:00. It was mean –0.416 (variance 43.94) on differences between smartphone and paper VAS. It was mean 0.25 (variance 34.70) on differences between iPad and paper VAS. There is no significant difference by t test. The ICC of paper VAS and iPad, single measurements 0.969 (p<0.001), mean measurements 0.984 (p<0.001), the Cronbach α coefficient were 0.984. The ICC of paper VAS and the smartphone, single measurements 0.957 (p<0.001), mean measurements 0.978 (p<0.001), the Cronbach α coefficient were 0.978. Both smartphone and iPad showed very high reproducibility. VAS using the conventional paper had been conducted by scales 100 mm or more, but was able to test that we could treat even a scale of around 50 mm of the smartphone equally.