This study adopted Ambridge's research paradigm to examine the effects of entrenchment, preemption, and verb semantics in second language (L2) acquisition of English "un-" prefixation. Three groups of Chinese learners of English (second- and fourth-year English majors and teachers of English) rated the acceptability of 48 "un-"…

Data is presented in support of the assertion that the interlanguage hypothesis should be extended from adult second language acquisition settings to those non-simultaneous child language acquisition settings where the major sociolinguistic variable is the absence of peers who are native speakers of the target language. (Author/RM)