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  1. Alternative conception, misconception, naive conception, and pre-instructional conception are some of the names used to describe the phenomenon in which a learner has a strong commitment to an idea or explanation that differs from the scientific conception.

  2. Alternative conceptions are persistent, well embedded in an individual's cognitive ecology, and difficult to 'teach away,' especially by didactic methods.

  3. Frequent testing for conceptual understanding of an idea helps students and teachers monitor progress being made toward desired conceptual change.

  4. Various strategies are used to challenge alternative conceptions, such as the presentation of experiences and observations that cannot be adequately explained by the naive idea).

  5. Anomalous data by itself is not enough, however, since individuals are very good at ignoring or explaining away such data so as to preserve their personal theory (see Chinn & Brewer, 1993).

  6. Anchoring concepts, bridging strategies, and analogies can help learners move from their naive conceptions to more scientific conceptions. (see Clement, 1987; Clement, Brown, & Zeitman, 1989; Brown & Clement, 1989; Gentner, 1983; Vosniadou & Ortony, 1989).

  7. Alternative conceptions are not readily detected by conventional testing methods.

  8. A teacher cannot effectively teach away alternative conceptions without first being aware of their existence.

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