This article reports the findings of an empirical study which examined the effectiveness of a blog-integrated English as a foreign language(EFL)college writing course in Taiwan by comparing two groups of learners in terms of their linguistic performance and perceptions.The two groups were compared by their progress in fluency,accuracy,and lexical complexity in the regard of linguistic performance.They were also compared by their perceptions on the course of study in terms of the instructor’s teaching behavior,the facilitative effect of the course on their learning to write,their interests/preferences,and the effect of the course on their confidence in writing.The experimental group was also inquired to report their preferences on the four distinctive features of blogs.Randomly selected,26 non-English majors participated in a conventional English writing class(the control group)and 18 students in a blog-integrated English writing class(the experimental group).The results showed that there were no significant differences among the two classes in linguistic performance.Nevertheless,intra-group analyses showed that both groups progressed in writing fluency and accuracy.Although most of the students held favorable attitudes toward their course of study,there were no significant differences between the two groups in perceptions.As for the experimental class’perceptions on blogging to write,the learners regarded the blog-integrated course as a positive experience and among the features of blogs,comment was mostly preferred by the students,with archiving being the second,self-publishing the third,and hyperlink the fourth.