The concept of language transfer as discussed in Dulay, Burt, and Krashen's book, "Language Two," is critically examined. It is suggested that the work's major thesis, that language transfer, or interference, is relatively low for second language acquisition, is unproven. A survey of the research reports cited to support this claim showed that the authors of the book had (1) used articles containing faulty analyses, (2) misrepresented the claims of certain articles, and (3) incorrectly interpreted research results. In some cases, the results cited as similar were not comparable because of differing research definitions, that quotations were taken out of context or given new interpretations, and that some evidence cited as conclusive can also be interpreted as ambiguous. It is proposed, based on this review, that there is no unambiguous support in the literature cited by Dulay, Burt, and Krashen to substantiate the claim of limited language transfer in second language acquisition. A brief survey of research reports that promise to provide insight into the process of second language acquisition concludes the review. (MSE)