“…Studies (Gery, 1991 ;Shepherd, 1997 ;Sweller & Chandler, 1994 ) were performed among industry workers while others surveyed participants in higher-education settings (Kluge et al, 2013 ). A few studies included high-school students in their study (Kancler et al, 2007 ). Early research on job aids found them to be most useful for scaffolding complex and infrequent tasks, as well as tasks where the costs of errors were high (Ormerod, Richardson, & Shepherd, 1998 ;Shepherd & Marshall, 2005 ).…”