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Fig. 1 | Research and Practice in Technology Enhanced Learning

Fig. 1

From: Comparison between behavioral and structural explanation in learning by model-building

Fig. 1

Model of the change of amount of water in a bathtub. This is a model built with Evans that represents the change of the amount of water in a bathtub, in which constant amount enters from an inlet (in-flow) and the amount proportional to the water level exits from an outlet (out-flow). Objects “bathtub,” “inlet,” and “outlet” have the attributes “amount,” “in-flow,” and “out-flow” respectively. In-flow is constant and outlet is proportional to the water level (amount). The parameter “rate” is defined as the subtraction of outlet from inlet that is integrated to be the amount of water. The model is translated into a set of qualitative equations, and its temporal behavior is calculated

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