This meta-analysis pools data from 25 years of research on the order of acquisition of English grammatical morphemes by students of English as a second language (ESL). Some researchers have posited a "natural" order of acquisition common to all ESL learners, but no single cause has been shown for this phenomenon. Our study investigated…

Raises three questions concerning the present state of second-language acquisition research: (1) What has it achieved for language teaching? (2) How close is a theory of second-language acquisition? (3) What is its status within the chorus of disciplines that deal with language? (Author/JL)