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Longitudinal Research

Longitudinal Research

Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...

Longitudinal Studies

Longitudinal Studies

Longitudinal studies are also widely used in other medical and social science fields. For instance, in cardiovascular research, they can monitor patients' health over decades to identify risk factors for heart disease, such as high cholesterol or smoking, and evaluate the long-term effectiveness of preventive measures. Similarly, in mental health studies, researchers might follow individuals from adolescence into adulthood to understand the development and progression of conditions like...

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Related Experiment Video

Updated: Jun 6, 2026

Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers

Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers

Published on: March 14, 2018

Toddler Track: Streamlining Developmental Assessments-A Retrospective Cohort Study.

Naomi Campbell-Woods^1,2, Sarah Atkinson^1,2, Jessica Balfour-Ogilvy³

¹Child Development Service - South, Browns Plains Community Health Centre, Hillcrest, Queensland, Australia.

Journal of Paediatrics and Child Health

|June 5, 2026

Summary

This summary is machine-generated.

The Toddler Track Model (TTM) significantly reduced wait times and assessment duration for developmental services in children aged 18 months to 3 years 11 months. This novel care model improved service capacity without compromising diagnostic outcomes.

Keywords:

assessment autism diagnosis neurodevelopmental

More Related Videos

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Published on: June 20, 2020

Related Experiment Videos

Last Updated: Jun 6, 2026

Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers

Use of a Video Scoring Anchor for Rapid Serial Assessment of Social Communication in Toddlers

Published on: March 14, 2018

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Measuring the Functional Abilities of Children Aged 3-6 Years Old with Observational Methods and Computer Tools

Published on: June 20, 2020

Area of Science:

Developmental Pediatrics
Healthcare Management
Service Delivery Models

Background:

Specialist outpatient developmental assessment services face challenges with long wait times and lengthy assessment durations.
Efficient service delivery is crucial for timely diagnosis and intervention in toddlers with developmental concerns.

Purpose of the Study:

To design, implement, and evaluate the Toddler Track Model (TTM) for developmental assessment.
To determine if TTM reduces wait times and assessment completion time.
To assess the impact of TTM on the formulation of developmental profiles.

Main Methods:

The Toddler Track Model (TTM) utilized a Plan-Do-Study-Act (PDSA) framework for service redesign.
Children aged 18 months to 3 years 11 months were triaged into four streams with tailored pathways.
Outcomes were measured via retrospective chart audit comparing pre- and post-TTM implementation metrics.

Main Results:

Average time from initial clinical session to diagnostic formulation decreased from 116 to 63 days (p < 0.001).
Service-wide wait times declined by 61.5%, with TTM contributing an estimated 68% of this reduction.
Service capacity increased, with a substantial rise in the number of children assessed, without changes in diagnostic outcomes.

Conclusions:

The Toddler Track Model (TTM) is an effective novel care model for toddler developmental assessments.
TTM successfully reduced wait times and assessment duration, enhancing service capacity.
The model maintained clinical practice standards and diagnostic outcome consistency.