Mobile Mood Tracking: An Investigation of Concise and Adaptive Measurement Instruments
summary
Smartphone studies show a two-item measure (positive and negative activation) reliably matches the longer I-PANAS-SF across four samples and daily/weekly schedules and links negative activation to stress. A custom app runs a two-week prestudy plus twice-daily experience sampling and an adaptive algorithm that cuts follow-up items: offline it reduced full questionnaires in 29% of cases, online in 64%, yielding 62% fewer questions and ~5,000 fewer answers with no change in compliance. Positive and negative activations require different temporal models.
AI-written summary · about