Book a free consult

Longitudinal Study

Methodology & design

Definition

A design that collects data from the same subjects over multiple time points to observe change or causal ordering.

Related concepts

Cross-sectional Study Research Design Conceptual Framework Construct Validity Dependent Variable Hypothesis

Read the complete guide A–Z encyclopedia

Guides that use this concept

Types of Research Design: Which One Fits Your Study?

How to Choose a PhD Research Topic You Won't Regret

Qualitative vs Quantitative vs Mixed Methods: Which Fits Your Study?

Reliability and Validity Explained (With Examples)

Mentoring for this area:Research Methodology Research Questions & Objectives Questionnaire Design

Not sure where to start?

Book a free 15-minute consult. We'll map your next three steps — no obligation.

Book a free consult WhatsApp us

Ethical, compliant guidance

We provide academic support, mentoring, analysis, editing and structuring — not authorship. Your work stays compliant with university policies.