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Table 2 Examples of variables measuring the competence of ‘understanding and characterizing the problem (PUC)’

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

Variable Analysis of Description Coding
PUC01-02 Methanol and acetic acid Analyzing an unknown substance by taking into account system outputs (spectra, molar mass) and additional information given by tables 0, 1 each
PUC03-06 Ethanol, pentanol, formic acid, and butyric acid Analyzing an unknown substance by taking into account system outputs (spectra, molar mass) and further information given by tables 0, 1 each
Different types of information have to be combined (tabular and graphical sources)
PUC07 Sulfuric acid Analyzing an unknown substance with information that is explicitly given (molar mass) 0, 1