High Quality Content by WIKIPEDIA articles! The worked-example effect is a learning effect predicted by cognitive load theory (Sweller, 1988). According to Sweller: "The worked example effect is the best known and most widely studied of the cognitive load effects"(Sweller, 2006, p. 165)."A worked example is a step-by-step demonstration of how to perform a task or how to solve a problem" (Clark, Nguyen, Sweller, 2006, p. 190). Studying worked examples is an effective instructional strategy to teach complex problem-solving skills (van Merrienboer, 1997). This is because example-based instruction provides expert mental models, to explain the steps of a solution for novices.

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