Compliance
We did not observe an overall effect of interaction modality
on compliance. As indicated in the sections on Feedback and
Appearance, participants preferred as much feedback from
the drone as possible. Quantitative results from the survey
also indicated that the usage of both light and sound was rated
as more sensible. Prior research indicates that mixed modalities
are the most preferred and consequently most persuasive
in captology based scenarios [3, 17]. We did observe that the