Variables – The resources describes the basic types of variables in a research study, provides definitions and offers examples.
What are examples of variables in research? – These resources provides definitions and examples. (Dead Link)
Variables – This link offers definitions of variables and related terms and discusses traits that are important in the variables used in research study.
Identify Key Variable and Research Design – The resources discusses types of variables and how the identification of the variables is a key first step in creating the research design.
Variables – The link provides definitions and compares the six most common types of variables.
Operational Definition and Level of Measurement – This resources discusses operational definitions and level of measurement for dependent variables.
Operational Definitions – The website defines and discusses operational definitions of variables.
Key Issues in Quantitative Research