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Edexcel A-Level Psychology AS 2.2.3 Experimental and Null Hypotheses Questions

Practise Edexcel Psychology questions writing fully operationalised experimental and null hypotheses with clear variables and measurable outcomes.

Syllabus
First assessment 2026
Course
Psychology XPS01/YPS01
Level
AS

Exam points

  • write a fully operationalised null hypothesis using measurable IV and DV outcomes

Edexcel A-Level Psychology AS 2.2.3 Experimental and Null Hypotheses Questions question 1

[Maximum number: 2]

Harrison conducted an experiment into the effect of antidepressants on people who had seasonal affective disorder. He allocated his participants into one of two different conditions.

- Condition A: Given antidepressants.
- Condition B: Not given antidepressants.

Harrison asked all the participants to record their mood in a daily diary for a month. He used a rating scale from 1 (happy mood) to 7 (low mood). When he had collected the data, Harrison then calculated an average mood score for each participant over the month.

State a fully operationalised null hypothesis for Harrison's experiment.

Table for Question Edexcel A-Level Psychology AS 2.2.3 Experimental and Null Hypotheses Questions question 1 — Edexcel A-Level Psychology AS
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