Student or educator? Sign up with your school email and get 6 months of Pro free.

The DOI matches its Crossref record; 39 of the 40 references it cites were found in a registry or an index.

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

Nagin, Daniel S.·1999·Psychological Methods

Abstract

A developmental trajectory describes the course of a behavior over age or time. A group-based method for identifying distinctive groups of individual trajectories within the population and for profiling the characteristics of group members is demonstrated. Such clusters might include groups of "increasers. " "decreasers," and "no changers. " Suitably defined probability distributions are used to handle 3 data types—count, binary, and psychometric scale data. Four capabilities are demonstrated: (a) the capability to identify rather than assume distinctive groups of trajectories, (b) the capability to estimate the proportion of the population following each such trajectory group, (c) the capability to relate group membership probability to individual characteristics and circumstances, and (d) the capability to use the group membership probabilities for various other purposes such as creating profiles of group members. Over the past decade, major advances have been made in methodology for analyzing individual-level developmental trajectories. The two main branches of methodology are hierarchical modeling (Bryk &

Overview

Integrity signals

Registry

Crossref · 10.1037/1082-989x.4.2.139

Cites

39 of 39 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Verification

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Citations

Cites

Show all 40 references

Cited by

See all 2,346

Metadata

Authors
Nagin, D. S.
Affiliations
Carnegie Mellon University (US)
Corresponding author
Nagin, Daniel S.
Venue
Psychological Methods
Published
1999-06
Volume
4
Issue
2
Pages
139-157
ISSN
  • 1082-989X (ISSN-L)
  • 1939-1463
OpenAlex
W2072221629
Cited by
2,346
References
40
Citations by year
2026: 67 · 2025: 62 · 2024: 83 · 2023: 85 · 2022: 89 · 2021: 119 · 2020: 103 · 2019: 115 · 2018: 94 · 2017: 127 · 2016: 121 · 2015: 135 · 2014: 112 · 2013: 106 · 2012: 129
FWCI
21.35
Type
journal article
Language
en
Open access
closed
Locations
Psychological Methods (publishedVersion)
Topics
  • Physical Sciences › Mathematics › Statistics and Probability › Statistical Methods and Bayesian Inference
  • Social Sciences › Decision Sciences › Management Science and Operations Research › Psychometric Methodologies and Testing
  • Physical Sciences › Computer Science › Artificial Intelligence › Bayesian Methods and Mixture Models
Keywords
developmental trajectories, group-based trajectory modeling, semiparametric models, count data, binary data

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review

How to cite

Cite CoChat for the checks on this page, and the paper for its own findings.

This page
CoChat. (2026). Citation check: Analyzing developmental trajectories: A semiparametric, group-based approach. https://app.cochat.ai/papers/10.1037/1082-989x.4.2.139
The paper
Nagin, D. S. (1999). Analyzing developmental trajectories: A semiparametric, group-based approach. Psychological Methods. https://doi.org/10.1037/1082-989x.4.2.139

Data sources

Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.