User-based research in web accessibility - Problem finding by user testing and preparation for the questionnaire - Masako Muraoka masacom@cis.twcu.ac.jp Tokyo Woman’s Christian University Takayuki Watanabe nabe@cis.twcu.ac.jp Tokyo Woman’s Christian University QUIS 1. World Wide Web Consortium Web Content Accessibility Guidelines 1.0[1] JIS X 8341-3:2004 : img alt alt 2007 1 [2] 2 3 5 2. Mankoff [