Revisions of the original conceptual change model Personal note from (Tyson et al., 1997) Due to the overemphasis on rational aspects of learning in the initial model (Posner, Strike, Hewson, & Gertzog, 1982), Strike and Posner (1992) revised their original model a decade later and acknowledged the importance of affective and social issues for conceptual change. The centrality of the conceptual ecology in the change process was most recognised in revised version with successively expending the features comprising the learner’s conceptual ecology (Tyson, Venville, Harrison, & Treagust, 1997). Furthermore, Strike and Posner (1992) point out that alternative conceptions may not necessarily pre-exist but “may be generated on the spot as a consequence of instruction” (p. 158), therefore, “all parts of the conceptual ecology , including scientific conceptions and misconceptions, must be seen as dynamic and in constant interaction and development ” (p. 160). Reference: Posner, G...