Klauer and Phye (2008) were more interested in inductive reasoning across all subject areas. Their meta-analysis was related to programs that aimed to teach detecting generalizations, rules or regularities. They developed a series of non-verbal training materials and then analyzed 74 studies that used these methods. The overall effect (d = 0.59) is quite high, showing the positive effects of teaching these skills, and supporting the claim that teaching of “making comparisons and contrasts” can be enhanced when taught across context, but they noted that there comes a point after students have
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