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2.2.10 - Experimenter effects and demand characteristics

Syllabus
2026
Objective
2.2.10
Level
AS

- Experimenter effects and demand characteristics

2.2.10 Experimenter effects, demand characteristics and control issues.

Use - experimenter effects and demand characteristics to connect the rule to the data and decision in the question.

This matters because - experimenter effects and demand characteristics determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - experimenter effects and demand characteristics to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Experimenter effects and demand characteristics is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.

ConceptA-Level Edexcel Psychology AS