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the psychology of learning and motivation - Percepts and Concepts ...

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250 Andrew F. Hecklerresponses that can help to support <strong>the</strong> claim that automatic processes areinvolved. In <strong>the</strong> next section, I will describe how a large class <strong>of</strong> sciencequestions involve competing dimensions, <strong>and</strong> automatic bottom-up processesmay at least partially cause <strong>the</strong> known misconception-like answeringpatterns to <strong>the</strong>se questions.7. THE PHENOMENON OF COMPETITION IN SCIENCE QUESTIONSSection 5 described an example in which competing relevant <strong>and</strong>irrelevant information (from <strong>the</strong> perspective <strong>of</strong> an expert) was present in ascience question, <strong>and</strong> many students consistently based <strong>the</strong>ir answer on<strong>the</strong> irrelevant information. In this section, I will discuss in more detail <strong>the</strong>phenomenon <strong>of</strong> competition between relevant <strong>and</strong> irrelevant informationin science questions, <strong>and</strong> <strong>the</strong> outcomes <strong>of</strong> this competition as mediated by<strong>the</strong> low-level mechanisms <strong>of</strong> relative processing time <strong>and</strong> allocation <strong>of</strong>attention. The phenomenon <strong>of</strong> competition in science questions <strong>and</strong> itsrole in misconception-like answering patterns is described in three points:First, it is assumed that students may consider—ei<strong>the</strong>r implicitly orexplicitly—a number <strong>of</strong> dimensions (e.g., variables or features) whenanswering science questions. I would like to emphasize that <strong>the</strong> dimensionsconsidered by a novice are not always <strong>the</strong> same dimensions consideredby an expert. Novice students may utilize dimensions not scientificallyvalid according to experts because <strong>the</strong> students may none<strong>the</strong>lessperceive <strong>the</strong>se dimensions as relevant. For example, when determining<strong>the</strong> period <strong>of</strong> a pendulum, many students may consider both <strong>the</strong> mass <strong>and</strong>length <strong>of</strong> <strong>the</strong> pendulum (see Figure 3), yet only <strong>the</strong> length is scientificallyrelevant.[(Figure_3)TD$FIG]Figure 3 Examples <strong>of</strong> physics questions with competing dimensions. The indicatedstudent response percentages were collected in pilot studies, with N > 40 in for eachquestion.

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