In recent years there have been several prominent researchers who have continued to develop the cognitive theories of multimedia learning and cognitive load. Among these are Richard E. Mayer, Roxana Moreno, John Sweller, Jan Plass, and Wolfgang Schnotz. Significant studies have included Mayer & Anderson (1991); Moreno & Mayer (2000); Schnotz & Bannert (2003); Pass, Renkl
& Sweller (2004); and Plass, Chun, Mayer, & Leutner (2004). Gall
(2004) points out that much of Mayer’s research has been published in top peer-reviewed journals such as the Journal of Educational Psychology and is available for deeper study and critique. Dacosta (2008) provides a detailed table of almost 70 published studies by CTML researchers on instructional principles, along with the number of experiments and the particular principle each study measured. For a substantial listing of dozens of CTML studies that support each of the twelve multimedia instructional principles presented in this chapter, see Mayer (2009). Finally, Yuan et al. (2006) also cite a series of studies that suggest that working memory performance correlates with cognitive abilities and academic achievement.