Frederick, Helyne

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• Cross-sectional and longitudinal predictors of wellbeing: invariance across 25 years
  Positive Psychology
  Fischer, Judith, Frederick, Helyne, Niehuis, Sylvia, Sollie, Donna, Engler Jordan, Rachel, Corwin, Melinda, Herbert, Rick, SoRelle, Danielle, Lutz, Angela, Schrick, Brittney

  This study addressed: (a) whether any changes in well-being over time could be attributed to participants’ aging or to economic or historical events; (b) ...