“…Maintenance or retention measures mirrored those used before (i.e., pretest) or during intervention phases and were administered one day (e.g., Cates et al, 2007), two days (e.g., Nies & Belfiore, 2006), one week (Erbas, Turan, Ozen, & Halle, 2006), or a month (e.g., Van Hell, Bosman, & Bartelings, 2003) after intervention ended. Generalization measures included spelling training words in a sentence (e.g., Cuvo et al, 1995), spelling novel words (e.g., Hubbert, Weber, & McLaughlin, 2000), and reading words (i.e., Cates et al, 2007). Social validity measures generally consisted of questionnaires or surveys administered to students (i.e., McAuley & McLaughlin, 1992; Murphy, Hern, Williams, & McLaughlin, 1990; Nies & Belfiore, 2006).…”