Adolescent procrastination, time‑perspective & physical activity

Clean, de-identified item-level data from a cross-sectional study of secondary school students examining how time perspective profiles and weekly physical activity relate to irrational procrastination. The data set includes (a) the original survey export, (b) a quality-checked and imputed version created with a robust dual-scale pipeline (MICE, IRT, Mahalanobis, person-fit), and (c) R scripts needed to reproduce all cleaning, sensitivity analyses, SEM analyses, and tables. Variables include 18 ZTPI items, 9 IPS procrastination items, IPAQ-SF activity codes (Low/Moderate/High), sex, age, school type, GPA. README and session info files document methodology, code versions, and licensing; everything is shared under CC BY 4.0 for unrestricted reuse.