|Type of error||Description and example||Minus point|
The students did not draw an essential link between the two nodes.|
The students created a wrong definition, e.g., the vector was defined as a directed line segment; the domain and codomain were linked to the inner product space/general vector space, not to the function; a vector space was defined as a subspace of an inner product space.
|Moderate error||The students connected a partially incorrect relation, e.g., the measurement-related nodes were connected to the vector and not to the inner product function; the axiom-related nodes were connected to the inner product space, not to the inner product function.||− 5|
|Minor error||The students described partially incorrect linking words, but the relation was correct, e.g., a “must” word was not included when defining a relation to the axioms.||− 2|