A model combining latent trajectory classes with a model for variation within classes. Class count, within-class variances, error assumptions and measurement timing affect the resulting patterns. A statistical class is not by itself an explanation of its members' adaptation.[ref]
Resilience to Major Life Stressors Is Not as Common as Thought by Frank J. Infurna and Suniya S. Luthar. 2016, alternative within-class variance assumptions
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