“…Overall, 53 [25–27,29–33,35–46,48–52,54,56–67,69,70,72–83] out of the 60 studies looked at a knowledge as an outcome. Nineteen of these studies [25,32,35,40,43,45,48–50,56,57,60,69,72,74,75,77,80,82] used only multiple choice questions (MCQs) to test students’ knowledge and understanding. Six studies used MCQs as a knowledge assessment tool together with an adaptive spaced test [36], gap text questions [51], matching and short answer questions [61], open ended and true/false questions [64], short essay questions [81] and a key features test [59].…”