Stratification

Definition

Stratification is the sorting of data attributes concerning any group of entities (people, objects etc) into distinct homogeneous sub-groups and the representation of sub-group information in aggregate form.

The need for stratification arizes from the accumulation of large amounts of granular datasets which poses cognitive problems in the understanding and communication of the information content of such data sets.

Usage

• Stratification can be used to check or ensure a target Allocation of subgroups
• Stratification can be used to control for confounding variables (variables other than those the researcher is studying), thereby making it easier for the research to detect and interpret relationships between variables

See Also

• Stratification in Clinical Trials