This study analyzed inductive and deductive instructional approaches for teaching grammar within a Presentation-Practice-Production grammar lesson. The participants of this study included 119 Korean university students enrolled in an English as a foreign language class, with approximately half receiving deductive instruction and the other half receiving inductive grammar instruction. The analysis involved comparing learning gains as well as student perceptions of the two approaches via Mann Whitney U tests. The results showed no statistical difference in terms of the immediate or delayed learning gains for each grammatical topic, nor when all grammatical topics were aggregated. However, the analysis of student perceptions indicated that students found inductive instruction to be moderately more effective, interesting, and easier than deductive instruction. The study concludes with a discussion of the implications of these findings related to instructional practices in foreign language classes that utilize the Presentation- Practice-Production model as well as suggestions for future research concerning deductive and inductive instructional approaches.

The current study is designed to investigate the use of deductive and inductive grammar teaching approaches in online instructional videos in a fully online asynchronous learning context across four different grammar lessons. More specifically, the study aimed to analyze two aspects about these two options for grammar instruction; their impacts on effectiveness in learning the grammar, and also the students’ perceptions of the two options in terms of interest, effectiveness, and difficulty. To address these research aims, this study employed a quasi-experimental approach where 82 participants were divided into two groups, and each group was taught via only deductive instruction or only inductive instruction. As for the results, regarding effectiveness, an ANCOVA test resulted in no differences when comparing across all four lessons combined. Furthermore, Mann-Whitney U tests indicated no difference in effectiveness for each individual grammar lesson. Regarding student perceptions, ANOVA tests indicated no difference in the students’ perceptions of interest, effectiveness, or difficulty.