Stanley Hall's (1904) description of adolescence as a time "suggestive of some ancient period of storm and stress when old moorings were broken and a higher level attained" is arguably one of developmental psychology's most vivid and powerful metaphors. Its relatively insignificant contribution to Hall's treatise (Arnett, 2006), the early demise…

Developmental trajectories provide the empirical foundation for theories about change processes during development. However, the ability to distinguish among alternative trajectories depends on how frequently observations are sampled. This study used real behavioral data, with real patterns of variability, to examine the effects of sampling at…