Longitudinal associations between academic achievement and depressive symptoms in adolescence: Methodological considerations and analytical approaches for identifying temporal priority

Failure to meet educational expectations in adolescence can derail an individual's potential, leading to hardship in adulthood. Lower academic achievement is also associated with poorer mental health, and both share common pathways to adult functional outcomes like employment status and economic security. Although linked in adolescence, and predictive of similar outcomes in adulthood, methodological and analytical limitations of the literature do not permit the assessment of the temporal priority between academic achievement and mental health. This omission of directionality hampers intervention and prevention efforts. In this narrative review, we summarize the literature on the temporal ordering between academic achievement and depressive symptoms in adolescence, a particularly vulnerable developmental period. We propose methodological and analytical strategies to guide future research to disentangle the chronological ordering between academic achievement and depressive symptoms-recommendations that can be used to examine other sets of correlated variables over time. Specifically, we highlight methodological issues that require attention such as the need to understand reciprocal and cascading influences over time by attending to repeated measures and timing, measurement consistency, reporter effects, examination of processes and mechanisms, and missing data. Finally, we discuss the need to embrace analytical methods that separate within-person from between-person effects; account for heterogeneity in associations using person-centered approaches; and use the two approaches as complementary, rather than competing, for a more holistic examination of temporality.