Abstract
People and their environments continuously shape one another across time. Understanding person-environment transactions is essential for describing, predicting, and explaining the dynamics and development of individual differences. Yet, progress on this has been constrained by two common limitations: study designs driven by practical rather than theoretical considerations and neglecting how person-environment processes unfold across multiple timescales. Here, we present the rationale and design of the My Personality––Wrapped (MPW) Study, a measurement-burst study designed to investigate how individual differences in personality, well-being, attitudes, social and interpersonal behaviors, and health develop and dynamically fluctuate alongside environmental influences across multiple timescales. Across 1 year, participants (Nmax = 1,230) completed baseline (T0) and post-study (T6) assessment batteries, five bimonthly surveys (T1–T5), and 15 pseudorandomly scheduled 1-week bursts comprising mobile sensing, experience sampling, daily, and weekly surveys. This intensive, multi-method study provides comprehensive cross-timescale data on psychological constructs and contextual experiences. The MPW Study is designed to advance the field’s understanding of temporal dynamics underlying individual differences by disentangling within-person processes from between-person differences, facilitating theory development and testing of multi-timescale person-environment transactions, and informing future theory-driven research on the dynamics of personality and well-being, social and health processes, and life disruptions.