Investigating the Effects of Oral Output on the Learning of Relative Clauses in English: Issues in the Psycholinguistic Requirements for Effective Output Tasks

This study investigated whether giving learners an opportunity for oral output has any positive effect on the L2 learners' acquisition of a grammatical form. Twenty-four adult ESL learners were randomly assigned to one of three groups: an output group, which engaged in a picture description task that involved input comprehension and output production; a non-output group, which engaged in a picture sequencing task that required input comprehension only; and a placebo control group. The two treatment groups were exposed to the same aural input for the same amount of time. Learning was assessed by means of a pre-test and a post-test consisting of production and reception parts. The results indicated that, contrary to our expectations, the output group failed to outperform the non-output group. On the contrary, it was the non-output group that showed greater overall gains in learning. A careful post-hoc re-examination of the treatment tasks revealed that the output task failed to engage learners in the syntac...