What question did this study set out to answer?

To introduce and evaluate a semiparametric, group-based statistical framework for identifying distinct developmental trajectory groups within a population over age or time.

June 1, 1999Psychological Methods

Analyzing developmental trajectories: A semiparametric, group-based approach.

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Authors

DNDaniel S. NaginPublic Policy Institute of California

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Implication

Methodological evaluation demonstrates a semiparametric group-based framework to identify developmental trajectories across populations, highlighting improved profiling of longitudinal behavioral...

Key Points

To introduce and evaluate a semiparametric, group-based statistical framework for identifying distinct developmental trajectory groups within a population over age or time.
Formulated a statistical model applying tailored probability distributions to analyze count, binary, and psychometric scale longitudinal data.
Demonstrated analytical functions for identifying trajectory shapes (e.g., increasing, decreasing, or stable), estimating population proportions, and modeling group membership based on individual covariates.
Demonstrated four core capabilities: identifying trajectory groups empirically rather than assuming them, calculating the population share for each path, linking membership probabilities to individual factors, and profiling subgroup characteristics.
Validated methodological adaptability across multiple data types, providing an alternative framework to continuous hierarchical growth modeling.

Cite This Study

Daniel S. Nagin (1999) studied this question.

synapsesocial.com/papers/69d855e8d2f7327e70ae3095 https://doi.org/10.1037/1082-989x.4.2.139

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Implication

Methodological evaluation demonstrates a semiparametric group-based framework to identify developmental trajectories across populations, highlighting improved profiling of longitudinal behavioral...

Analyzing developmental trajectories: A semiparametric, group-based approach.

Discussion

Member takes

Implication

Key Points

Cite This Study

Analyzing developmental trajectories: A semiparametric, group-based approach.

Discussion

Member takes

Implication

Key Points

Cite This Study

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