satisfaction with the interactive approaches is expressed by the analysis of questionnaires, which the study participant fills out immediately after their tests are conducted and before any discussion or debriefing has started. The respondent is asked to fill in the questionnaire as spontaneously as possible. Intuitive answers are desired as user feedback instead of well-thought-out responses for each item in the questionnaire [@brooke1996sus].

For the randomized A/B study, individuals are selected to approximate a representative sample of the intended users of the final system [@siroker2013b]. During the study, subjects are given multiple interactive segmentation tasks to fulfill each in a limit time frame. The user segments all $m$ images provided with two different methods (A and B). All subjects are given $2 \cdot m$ tasks in a randomized order to prevent a learning effect bias, which would allow for higher quality outcomes for the later tasks. Video and audio data of the subjects are recorded. Every user interaction recognized by the system and its time of occurrence are logged.

Experiments {#sec:experiments}
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Data Set for the Segmentation Tasks {#sec:study_data_sets}
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In **Fig.**\[fig:study\_data\_sets\] the data set used for the usability test is depicted. For this evaluation, the colored images are converted 