“…Firstly, the manipulation of aesthetics is diverse: for example, manipulations of just one facet (e.g., color; Hall & Hanna, 2004; Moshagen, Musch & Göritz, 2009) versus a broad manipulation (e.g., Miller, 2011; Sonderegger & Sauer, 2010). Secondly, the operationalization of performance varies, encompassing task duration (e.g., Chawda et al, 2005; Moshagen, Musch & Göritz, 2009), number of correct answers (e.g., Douneva, Jaron & Thielsch, 2016; Van Schaik & Ling, 2009), number of errors (e.g., Reppa & McDougall, 2015; Salimun et al, 2010), number of commands needed (e.g., Reinecke & Bernstein, 2011; Sonderegger & Sauer, 2010; Sonderegger et al, 2014), as well as comprehension and transfer (Plass et al, 2014; Um et al, 2012). Thirdly, the type of tasks differs, spanning classical search tasks (e.g., Tuch et al, 2009; Van Schaik & Ling, 2009), creative tasks (e.g., Bonnardel, Piolat & Le Bigot, 2011) or learning tasks (e.g., Heidig, Müller & Reichelt, 2015; Miller, 2011; Um et al, 2012).…”