L2 Morphological Instruction Based on Affix Index: A Constructional Approach

This study introduces a pedagogical approach based on Construction Morphology and affix index, aiming to create morphological and syntactic contexts for L2 learners and enhance the effectiveness of teaching derived words. The experiment consisted of an Experimental Group (EG) receiving 40 minutes’ morphological instruction and a Control Group (CG) without such intervention. The instructional approach focused on six polysemous affixes, utilizing six sets of affix concordances (each comprising six sentences) to assist learners in conducting morphological analyses of familiar words containing the specified affixes. Subsequently, both groups underwent an immediate post-test evaluating four dimensions of morphological knowledge of new words: relational, syntactic, distributional, and semantic knowledge. The EG engaged in a delayed post-test two weeks later, with adjusted test item sequencing. Results indicated positive short-term effects on comprehensive morphological knowledge and its constituent aspects. However, in the delayed post-test, while no significant difference was observed in relational and semantic knowledge, the EG’s mean scores for syntactic and distributional knowledge notably declined. These findings underscore the efficacy of the affix index-based teaching mode in facilitating L2 learners’ understanding of morphemic structures and subsequent acquisition of derived words.