The pattern of facet activation is also likely to be influenced by cognitive
factors such as conceptual status and conceptual ecology. Posner et al. (1982)
described the need for a particular conception to be intelligible (i.e., able to be
understood by the learner, so that it makes sense), plausible (i.e., the learner
believes that it is true) and fruitful (i.e., it has usefulness for the individual as a
means for making predictions or solving problems). The status of a particular
conception (or facet) is determined by the extent to which it is intelligible, plausible
and fruitful to the individual (Hewson and Hewson 1992). It might be predicted
therefore that those facets which are of high status, and are considered to be
the most fruitful, will be used more frequently, and in a wider range of problem
contexts than will facets of less status. In addition, those students whose conceptual
ecology (Hewson and Hewson 1992, Tao and Gunstone 1999) includes a firm
epistomological commitment to consistency and generalizability could be expected
to have a very different pattern of facet activation than those individuals without
such beliefs.
At this stage however, there has been little attempt to identify students’ scientifically
The pattern of facet activation is also likely to be influenced by cognitivefactors such as conceptual status and conceptual ecology. Posner et al. (1982)described the need for a particular conception to be intelligible (i.e., able to beunderstood by the learner, so that it makes sense), plausible (i.e., the learnerbelieves that it is true) and fruitful (i.e., it has usefulness for the individual as ameans for making predictions or solving problems). The status of a particularconception (or facet) is determined by the extent to which it is intelligible, plausibleand fruitful to the individual (Hewson and Hewson 1992). It might be predictedtherefore that those facets which are of high status, and are considered to bethe most fruitful, will be used more frequently, and in a wider range of problemcontexts than will facets of less status. In addition, those students whose conceptualecology (Hewson and Hewson 1992, Tao and Gunstone 1999) includes a firmepistomological commitment to consistency and generalizability could be expectedto have a very different pattern of facet activation than those individuals withoutsuch beliefs.At this stage however, there has been little attempt to identify students’ scientifically
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