Student Assessment Based on Affective Factors in English Learning Using Fuzzy Inference 論文 Fitra A. BACHTIAR・Eric W. COOPER・Gunadi H. SULISTYO・Katsuari KAMEI ·2016 ·『International Journal of Affective Engineering』 15(2) pp. 101-108 doi:10.5057/ijae.IJAE-D-15-00037