The purpose of this task is to test the implementation done in the previous task. The
selected research method is dependent on the task. For example, for the user
experiments (see Experiment I and III in Section 4.3), we adopted the measure from
(Brasethvik, 2004) to obtain the perceived relevance of the search results by the users.
In addition, a questionnaire was used in Experiment I since the measure by (Brasethvik,
2004) does not take into account aspects like user experience. For the laboratory
experiments (Experiment II and III, Section 4.3), intrinsic and extrinsic measures were
used to evaluate the quality of the feature vectors with respect to the ontologies used.