ABSTRACT
The structure–function derivation process begins with the construction of a valid Lewis structure. For chemical students who successfully create a Lewis structure for the compound of interest, they must next think about the three-dimensional shape around each of the central atoms—in this case, the shape around both carbon atoms and the oxygen. The Lewis structures depicts for dimethyl ether and ethanol are quite straightforward: Both molecules follow the basic rules of Lewis structure construction and contain a single structural complexity, that is, both contain more than one central atom. For each Lewis structure, a peak load was calculated by subtracting the participant's resting heart rate from the maximum heart rate observed during the construction process. Lewis structures contributed to extraneous cognitive load. In general, the results of both inquiries point to the essential role that research can and should play in the instructional process. Cognitive load measurement can typically be clustered into one of three techniques: performance, subjective, and physiological.
