Smartwatch in vivo
summary
Study uses wearable cameras and repurposed cop‑cams to record 12 iPhone users over 34 days, producing 1,009 watch uses; glance counts show timepiece accounts for 50% of interactions but only 14% of total watch-use time, while notifications dominate by duration. Most interactions are under a second, many are no‑handed checks or even nose interactions, few calls are answered on the watch, and users hide checks to avoid social disruption; activity tracking shows both prospective and retrospective uses.
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