“…They are often used by instructors to promote transfer of a system of relationships between objects in a familiar analog domain to an unfamiliar target domain. Many studies have reported that the use of analogies resulted in beneficial outcomes (Hayes and Tierney, 1982;Simons, 1984;Beveridge and Parkins, 1987;Holyoak and Koh, 1987;Brown and Clement, 1989;Cardinale, 1993;Clement, 1993;Donnelly and McDaniel, 1993;Harrison and Treagust, 1993;Solomon, 1994;Treagust et al, 1996;Glynn and Takahashi, 1998;Fast, 1999). This research suggests that there are three main roles that analogies can play in promoting meaningful learning: (1) they can help students develop an understanding of new information (Simons, 1984;Thiele and Treagust, 1992;Glynn and Duit, 1995;Gentner and Markman, 1997;Iding, 1997;Venville and Treagust, 1997;Glynn and Takahashi, 1998), (2) they can help students visualize new or abstract information (Curtis and Reigeluth, 1984;Simons, 1984;Brown, 1993;Harrison and Treagust, 1993;Thiele and Treagust, 1994a;Dagher, 1995;Iding, 1997;Venville and Treagust, 1997), and (3) they can motivate students to learn meaningfully (Bean et al, 1990;Lemke, 1990;Thiele and Treagust, 1994a;Dagher, 1995;Venville and Treagust, 1997;Glynn and Takahashi, 1998).…”