The present study defined three levels of contextualized media and investigated their influences on students' science attitudes, comprehension, and argumentation. To achieve the purpose, an online game-based science argumentation (OGSA) program was developed for the experiments (N = 148). The OGSA included three versions for student argumentation regarding the use of contextualized medias: the mildly, moderately, and highly contextualized medias. For each version, the students had to play two types of games, find-the-fault and find-the-difference games, to complete one topic of argumentation learning. We found that the highly contextualized group
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