In broad sense, Sign language includes dactylology and Chinese sign.Dactylology plays a different role in language learning among different hearing. 本文认为,手语从广义上说包括聋人手语与手势汉语两种,从狭义上说即指聋人手语,这与过去手语研究者的观念是大相径庭的。
"dactylology :The use of the fingers and hands to communicate and convey ideas, as in the manual alphabet used by hearing-impaired and speech-impaired people." "手语:用手指和手来交流和表达思想;如听说有障碍的人所用的手势语字母表.;"