Digital Metaphor Game Boosts Primary Students’ Scientific Inquiry Skills, Study Finds

A role-playing adventure game in which sixth graders rescue a castle from a demon king by collecting six keys—each one standing for a step of the scientific method—has shown measurable benefits in a new study of game-supported science learning. Researchers in China developed a digital metaphor game and embedded it inside a three-week STEM project-based learning curriculum, then compared the approach against conventional project-based teaching in a quasi-experiment involving 90 primary school students. The results, published in the International Journal of STEM Education, suggest that a carefully designed metaphor delivered through gameplay can help young learners organize the abstract, multi-step process of scientific inquiry while also lifting their motivation and sense of immersion.

The problem the researchers set out to solve is a familiar one in science education. STEM project-based learning places students in authentic, open-ended tasks—designing a filtration system, testing how pollutants move through soil—that demand planning, evidence collection, analysis, and revision. But for primary school children, these open-ended structures can fragment attention, undermine motivation after failed attempts, and leave students unsure how to sequence the inquiry process. Prior research has consistently shown that inquiry learning benefits from scaffolding, especially for younger learners who depend on concrete, visible supports when grappling with abstract procedures. The question was not whether STEM projects should include inquiry, but how to make inquiry developmentally accessible to ten- and eleven-year-olds.

The team’s answer drew on conceptual metaphor theory, which holds that people understand abstract domains by mapping them onto familiar, concrete ones. Metaphors have long been used in science classrooms, but verbal or static metaphorical explanations often fail young students when the mapping between the familiar source and the abstract target is unclear. Digital games, the researchers reasoned, can instantiate those mappings interactively—through goals, rules, staged challenges, feedback, and progression—so that students experience the logic of inquiry rather than merely reading about it. Accordingly, they built Saving the Castle, a role-playing adventure developed in RPG Maker MV and deployed on Android tablets, in which the six-stage quest structure was deliberately aligned with six components of scientific inquiry: identifying questions, formulating hypotheses, planning, experimenting and data collection, analyzing and concluding, and communicating.

Crucially, the game was not a stand-alone activity. In the experimental condition, dubbed DMG-STEM PBL, the game served as a front-loaded scaffold: students played it before beginning hands-on project work, constructing an initial framework for inquiry through the adventure narrative. As project work progressed, the teacher deployed brief metaphor-recall prompts—asking students, for example, what the castle keys might represent in their current investigation, or how feedback in the game might inform revisions to their experimental strategy. Toward the end of each project, metaphor-supported reflective narration invited students to retell their work as an inquiry journey, casting their initial question as a mission goal, their decisions as route choices, their evidence as clues, and their revisions as strategy upgrades. This three-layer design was intended to let the inquiry framework be constructed, reactivated, and reflected upon across the entire project cycle.

The comparison group followed the same curriculum—two environmental STEM projects, Finding a Home for Waste and Cleaning Wastewater, delivered in six 35-minute sessions by the same experienced teacher in the same dedicated STEM classroom—but received conventional teacher-led explanation, procedural reminders, and reflective discussion instead of the metaphor-based supports. Implementation fidelity was checked by two independent observers using a 12-item checklist, and both conditions scored near the maximum, indicating that the metaphor scaffold was the main planned difference between the groups. Participants were 48 students in the experimental group and 42 in the control group, with class-level random assignment and no attrition over the study period.

The outcomes revealed a differentiated rather than uniformly favorable pattern. Students in the game-supported condition reported significantly higher overall perceived scientific inquiry competence, with the clearest gains concentrated in planning, experimenting and data collection, and analyzing and concluding—precisely the dimensions most closely aligned with the game’s procedural structure. No significant differences emerged for identifying questions, formulating hypotheses, or communicating, suggesting a boundary condition: practices that require epistemic creativity, theoretical reasoning, or social negotiation may need scaffolds beyond a narrative-driven metaphor. The authors caution that these findings rest on self-reports rather than performance-based assessments, so the results reflect stronger perceived competence rather than directly measured skill.

The learning experience told a similarly encouraging story. The experimental group reported significantly higher overall learning motivation, an effect driven by intrinsic rather than extrinsic motivation—a pattern consistent with the intervention’s design, which deliberately avoided points, badges, leaderboards, and ranking mechanisms in favor of meaning, competence, and engagement. Flow experience, the state of deep absorption associated with clear goals, immediate feedback, and matched challenge, was also significantly higher in the game-supported group, with a medium effect size. Supplementary exploratory analyses found no evidence that any of these differences varied by gender, which the researchers attribute to the game’s non-competitive, collaborative embedding within shared STEM projects rather than reliance on speed or reward accumulation.

One finding demands nuance: students in the game-supported condition reported higher overall cognitive load, driven by greater mental effort, though mental load—the perceived difficulty of the task itself—did not differ between groups. The researchers offer two compatible interpretations. The extra effort may reflect generative processing, as students actively connected the game’s staged progression and feedback to their ongoing inquiry tasks, reconsidering plans and strategies in ways consistent with their higher scores on planning and analysis. Alternatively, it may reflect the genuine coordination demands of juggling a game narrative, metaphorical meanings, teacher prompts, hands-on experimentation, and reflective narration. The authors frame this as a potential benefit-cost trade-off rather than unequivocal evidence of effectiveness, noting that instructional design should promote learning-relevant processing while minimizing extraneous demands.

The study’s limitations temper its promise. With only two intact classes, one per condition, class-level factors such as peer culture and group dynamics cannot be fully ruled out, and the three-week duration leaves open whether motivational gains persist after the novelty of gameplay fades—a well-documented concern in gamification research. Self-reported competence may also diverge from actual inquiry performance, and the design did not directly trace how students interpreted the metaphors or allocated cognitive resources during tasks. Still, the central lesson stands: the value of a digital metaphor game in STEM education lies less in the presence of game features themselves and more in the principled alignment among game design, inquiry practices, motivational mechanisms, and cognitive demands. For educators weighing whether to bring games into project-based science, the findings suggest the game should function not as a reward or a distraction but as a structural scaffold—one whose adventure, keys, and quests mirror the very process of doing science.

Subject of Research: The effectiveness of a digital metaphor game-mediated STEM project-based learning approach for primary students' scientific inquiry competence, learning experience, and cognitive load.

Article Title: Exploring the effectiveness of a digital metaphor game-mediated STEM PBL approach for primary students’ perceived scientific inquiry competence, learning experience, and cognitive load

Article References: Exploring the effectiveness of a digital metaphor game-mediated STEM PBL approach for primary students’ perceived scientific inquiry competence, learning experience, and cognitive load. (n.d.). https://doi.org/10.1186/s40594-026-00647-6

Image Credits: AI Generated

DOI: 10.1186/s40594-026-00647-6

Keywords: digital metaphor game, STEM project-based learning, scientific inquiry competence, primary education, cognitive load, learning motivation, flow experience, game-based learning, instructional scaffolding, conceptual metaphor theory, science education, quasi-experimental study