Solving real-world problems is a challenge for many students. The two-pathway model of student-generated drawing for real-world problem solving states that problem-solving performance is maximized when students make drawings that are (1) accurate and (2) in mathematical format. We investigated how drawing accuracy and problem-solving performance are affected by presence or absence of drawing support in the form of providing thumbnail representations of the key elements to be used in the drawing (intended to enhance drawing accuracy) and providing mathematical drawing instructions to create schematic representations (intended to prime mathematical format in drawings) or situational drawing instructions to create pictorial representations (intended to prime drawings with extraneous situational elements). In a 2 x 2 between-subjects experiment with drawing support (supported drawing or unsupported drawing) and drawing instructions (situational drawing instructions or mathematical drawing instructions) as factors, 112 undergraduate students were randomly assigned to one of four drawing conditions. In line with the two-pathway model, we found that students provided with drawing support and mathematical drawing instructions outperformed those in other conditions on solving real-world problems. Based on path analyses, this effect was attributed to higher drawing accuracy and fewer extraneous situational elements in their drawings. Results support the two-pathway model of how student-generating drawing can support real-world problem solving.
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