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The Phylogeny Assessment Tool (PhAT). Each of the three parts of the PhAT (A, B, and C) was administered to students as a pretest and a posttest during Fall 2008 and Fall 2009. Depicted are the questions as asked during Fall 2008. During Fall 2009, parts B and C were each split into two parts that asked the main question and, separately, asked the open-ended rationale for that answer (“Explain your reasoning”).
