e. The evaluation techniques
used for these ubicomp applications would
ideally take place in situ, involve several participants,
take place over time, and collect both qualitative
and quantitative data. To help with the Personal
Server evaluation, we used a technique from the field
of psychology—called the Experience Sampling
Method3—that other researchers have found to be
effective for learning about situations and person-situation
interactions. The technique compares most
closely with recall-based self-reporting techniques
such as interviews, traditional surveys, and diaries.