Written and oral data were evaluated by native speaking judges to ascertain the extent to which they could identify the members of the same native language group on the basis of either phonological or syntactic evidence. Results are presented and other research data are examined to see if they support these findings. (SED)

Current research on adult second language learning suggests that study is necessary to separate interference variables from intralinguistic variables and to determine the relative difficulty of structures in each group. This research on the acquisition of the English relative clause was specifically designed to test the transfer hypothesis…