Designed Experiments, Explanatory Variables, and Causation

Designed Experiments

• A designed experiment is a structured research method in which a researcher deliberately manipulates conditions to observe specific outcomes.
• The structural framework of a designed experiment provides the necessary methodological control to establish direct cause-and-effect relationships.

Explanatory and Response Variables

• Explanatory Variable:
  • The variable intentionally controlled, altered, or manipulated by the researcher.
  • It functions as the presumed cause or independent factor tested to evaluate its direct influence.
• Response Variable:
  • The outcome variable measured by the researcher.
  • It reflects the effect or final result produced by changes in the explanatory variable.

Claiming Causation

• Causation:
  • A fundamental condition where changes in an explanatory variable directly lead to changes in a response variable.
  • A designed experiment uniquely provides the required experimental controls and structure to legitimately claim causation between an explanatory variable and a response variable.