When teaching works and time helps: Noun modification in L2 English school children

The study focuses on the interaction between length of exposure and instruction in the L2 English acquisition process of L1 Spanish school children. Two target structures involving noun premodification are targeted: noun–noun (NN) compounds and adjective–noun (AN) strings. Four groups of participants have been studied for 3 years: a group that has been exposed to a specifically designed teaching program targeting NN compounds and a group that has received the regular English instruction program which does not address this structure as part of the curriculum. Two age subgroups appear in each case. The longitudinal judgment data elicited show that performance improves in the cooperation between length of exposure and the exposure to the NN instruction program. Furthermore, it is this last issue that actually takes the lead in that the NN instruction program directly impacts on not only NN compounds but also AN strings. This points to instruction being determinant in the L2 learning process; that is, a consciously and carefully directed instruction is proven to be more effective than length of exposure itself. This study on longitudinal experimental data contributes to shed light on the factors involved in instructed L2 acquisition.