  In situ self-report is widely used in human-computer interaction, ubiquitous
computing, and for assessment and intervention in health and wellness.
Unfortunately, it remains limited by high burdens. We examine unlock journaling
as an alternative. Specifically, we build upon recent work to introduce single
slide unlock journaling gestures appropriate for health and wellness measures.
We then present the first field study comparing unlock journaling with
traditional diaries and notification based reminders in self report of health
and wellness measures. We find unlock journaling is less intrusive than
reminders, dramatically improves frequency of journaling, and can provide equal
or better timeliness. Where appropriate to broader design needs, unlock
journaling is thus an overall promising method for in situ self report.
