Subjective feeling for intervention in the <i>Brain Age</i> and <i>Tetris</i> groups.

No significant difference was found between Brain Age and Tetris groups (two sample t-test, p>0.10). Effect size estimates were calculated using Cohen's d. d = 0.20 is regarded as a small effect, d = 0.50 as a medium effect, and d = 0.80 as a large effect. M, number of men; F, number of women; Motivation, motivation of playing the video game during the intervention period; Fatigue, fatigue during the intervention period; Satisfaction, satisfaction of the intervention during the intervention period; Enjoyment, enjoyment of the video game during the intervention period; SD, standard deviation.