The Influence of Attitudes and Affect on Willingness to Communicate and Second Language Communication 論文 Tomoko Yashima・Lori Zenuk‐Nishide・Kazuaki Shimizu ·2004-02-12 ·『Language Learning』 54(1) pp. 119-152 doi:10.1111/j.1467-9922.2004.00250.x