“…Social psychologists (for example, Berti & Grivet, 1990;Thompson & Siegler, 2000;Leiser & Halachmi, 2006) have investigated younger children's (largely 6-12-year-olds') understanding of price by presenting brief fictional stories and asking the children questions such as, 'What do you think will happen next?' Students' understanding of price has also featured strongly in the work of researchers in the phenomenography or variation theory tradition (for example, Dahlgren, 1984;Pong, 1998;Marton & Pong, 2005;Pang & Marton, 2005;Marton & Pang, 2008).…”