“…Some experiments have found that pretesting improves subsequent retrieval of the pretested material, but does not benefit other, non-pretested information (Carpenter, Rahman, & Perkins, 2018;Pressley, Tanenbaum, McDaniel, & Wood, 1990;Richland et al, 2009;Toftness, Carpenter, Lauber, & Mickes, 2018). Other studies, by contrast, have found that pretesting improves memory for both pretested and nonpretested information (Carpenter & Toftness, 2017), or that pretesting does not significantly benefit retrieval at all (Geller et al, 2017). Indeed, some experiments have even found that testing can impair the learning of new information when it is presented alongside the tested material (Davis & Chan, 2015;Finn & Roediger, 2013).…”