“…Research on worked examples inspired by cognitive theories such as ACT-R (Anderson, 1993;Van Merriënboer & Sweller, 2005) and cognitive load theory (Sweller, 1988;Sweller et al, 1998) and research on modeling examples inspired by social learning theory (Bandura, 1986) and cognitive apprenticeship (Collins, Brown, & Newman, 1989) has shown that both of these types of example-based learning are highly effective during the initial stages of problem-solving skill acquisition (for reviews, see Atkinson, Derry, Renkl, & Wortham, 2000;Van Gog & Rummel, 2010). Whereas worked examples are primarily based on a written account of a model's problem-solving procedure, modeling examples involve observing a model performing the task, which can take a variety of forms, not only live observation, but also watching a video in which the model is visible (e.g., Braaksma, Rijlaarsdam, & Van den Bergh, 2002), a video consisting of a screen capture of the model's computer screen in which the model is not visible (though s/he can be heard when a spoken explanation of what s/he is doing is provided; e.g., McLaren, Lim, & Koedinger, 2008;Van Gog, Jarodzka, Scheiter, Gerjets, & Paas, 2009), or an animation in which the model is represented by a pedagogical agent (e.g., Atkinson, 2002;Wouters, Paas, & Van Merriënboer, 2009).…”