3.2 Meaning of Variables
3.3 Types of Variables
3.3.1 Stimulus, Organism and Response Variables
3.3.2 Independent and Dependent Variables
3.3.3 Extraneous and Confounded Variables
3.3.4 Active and Attribute Variables
3.3.5 Quantitative and Categorical Variables
3.3.6 Continuous Variables and Discrete Variables
3.4 Constructs
3.5 Types of Constructs
3.5.1 Intervening Variables
3.5.2 Hypothetical Constructs