2008 年 10 巻 4 号 p. 435-444
Using eight hearing-impaired subjects and eight hearing subjects, this study sought the most effective point, for ease of reading, at which to break from one line into the next of captioning text presented by real-time speech-to-caption system. Results of Scheffe's paired-comparison showed that averages of preference scale of both hearing-impaired subjects and hearing subjects were high for a line-break pattern in which each line consisted of approximately 25 characters including one comma or more, and always breaking immediately after a period/comma. However, there were discrepancies in terms of degree of individual preferences. Eye movement measurements during reading captions indicated that there was a relationship between preferences for the ease of reading and how to read captioned text. Many of hearing-impaired subjects were non-follower type, i.e. many did not read captioned characters in the order of presentation. These subjects showed a high preference toward reading lines of captioning that were broken immediately after a period/comma. Moreover, fixation duration during regression of such patterns was short, even though the frequency of regression across lines was high. From these results, it is considered that hearing-impaired persons feel greater ease at reading when a captioning line breaks immediately after a period/comma. Keywords: the hearing impaired, real-time speech-to-caption system, Scheffe's paired-comparison
