Controlling of variables

Controlling of variables.

• Candidates should be able to:.
• describe how psychologists can control variables (use 'controls') in a study.
• understand control of variables/standardisation of a procedure.
• understand uncontrolled, participant and situational variables.

This matters because controlling of variables determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply controlling of variables to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Controlling of variables is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.