“…These are experimental/statistical research (four studies), case study (one study), individual interview (one study), and protocol analysis (seven studies). With the exception of one study that used statistical measurement (Bascones et al, 1985) and two that used interviews (Henderson et al, 2001;Kuo, 2004), most of the studies produced thinking aloud protocols (Simon & Simon, 1978;Larkin & Reif, 1979;Larkin et al, 1980;Chi et al, 1981;Larkin, 1981;Amigues, 1988;Robertson, 1990). Also it was reported that those metacognitive behaviours improved with thinking-aloud protocols which could also be a suitable method for physics problemsolving (Anderson & Nashon, 2006;Meijer et al, 2006).…”