Longitudinal Cross Section

A cross sectional study the not so distant cousin to longitudinal is intended to compare multiple population groups at a single point in time.

Longitudinal cross section. Definitionnouna section done by a plane along the long axis of a structuresupplementthe term longitudinal sectionpertains to a section done done by a plane along the long axis of a structure in contrast to the other term cross section which is a section that is cut transversely. The opposite of a cross sectional study is a longitudinal study. On the contrary a cross sectional study is a research where the researcher analyses a particular context group of people or else a social phenomenon through a sample.

The key difference between the two studies stem from the fact that while a cross sectional study presents the researcher with a cross sectional analysis of the research a longitudinal study. In a longitudinal study you repeatedly collect data from the same sample over an extended period of time. Longitudinal section a long section is a profile view of a surface along a particular route which plots elevation against the distance along the route e g ground profile along the center line of a road railway or river.

A longitudinal study is a research study in which the research continues for a longer period and uses the same sample at each phase. In a cross sectional study you collect data from a population at a specific point in time. In a long section elevations are determined along a fixed route.

Then they would set up a longitudinal study to study cause and effect. Cross sectional studies can be done more quickly than longitudinal studies. Longitudinal sections include but are not limited to median sagittal and coronal sections.

While cross sectional studies collect data from many subjects at a single point in time longitudinal studies collect data repeatedly from the same subjects over time often focusing on a smaller group of individuals that are connected by a common trait. Instead of collecting data over time on a single variable a cross section is framed allowing a researcher to see differences among population subsets in several categories. Longitudinal sections would therefore pertain to any vertical section such as median sagittal and coronal sections.