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Table 3 Examples of variables measuring the competence of ‘solving the problem (PS)’

From: Developing a computer-based assessment of complex problem solving in Chemistry

Variable Description Coding
PS01a Choosing three correct substances in order to synthesize the required substance 0, 1, 2, 3
PS01b Choosing the correct system settings of concentration and distillation in order to maximize the reaction yield 0, 1, 2
PS02a Replicating analyses only once 0, 1
PS02b Replicating syntheses only once 0, 1
PS03 Applying optimization steps of the reaction yield for meaningful reactions only 0, 1
PS04 Synthesizing substances with previously identified and analyzed precursors only 0, 1