Higher-order thinking is crucial to inquiry learning. It is important to investigate how students think in inquiry contexts. Given the tacit nature of higher-order thinking, cognitive maps (e.g., concept maps, reasoning maps) have been used to externalize thinking and have shown promising effects in terms of improving inquiry task performance.…

The use of external representations has a potential to facilitate inquiry learning, especially in hypothesis generation and scientific reasoning, which are typical difficulties encountered by students. This study proposes and investigates the effects of a three-dimensional thinking graph (3DTG) that allows learners to combine in a single image,…