Jason T. Newsom has written:

'Longitudinal data analysis' -- subject(s): Longitudinal method, Aging, Health, Longitudinal studies, Social sciences, Research

Marie Davidian has written:

'Applied longitudinal Data Analysis'

Longitudinal research involves collecting data repeatedly on the same person as he or she ages. This method allows researchers to study changes over time within the same individual.

A longitudinal study and a cross-sectional study are methods of collecting scientific data. A longitudinal study is the method that gathers data on a subject for a particular period of time and the subject's response to particular variables. A cross-sectional study is where more than one subject is used for the collection of data at different points in time in response to particular variables. These types of studies are sometimes used to determine correlation.

Hulin Wu has written:

'Nonparametric regression methods for longitudinal data analysis' -- subject(s): Longitudinal method, Mathematical models, Nonparametric statistics