Eduqas A-Level Psychology A290QS
Biological Approach
Psychodynamic Approach
Behaviourist Approach
Cognitive Approach
Positive Approach
Comparing the Five Approaches
Core Studies in Social and Developmental Psychology
Planning Psychological Research
Data Handling, Statistics and Mathematical Skills
Evaluating and Validating Research
Personal Investigations and Novel Research Scenarios
Addictive BehavioursAddictive
Autistic Spectrum BehavioursAutistic spectrum
Bullying BehavioursBullying
Criminal BehavioursCriminal
SchizophreniaSchizophrenia
StressStress
Controversies in Psychology
Planning Psychological Research
Experimental design
- 3 things to know
- Component 2
Overview
Recall questions on Experimental design.
What you need to know
Answer each one before you reveal it.
Give two weaknesses of an independent groups design.
What is a repeated measures design?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What does the term experimental design refer to?
Model answer
It refers to the way participants are allocated to the different conditions of the independent variable.
- 2
What is an independent groups design?
Model answer
Different participants take part in each condition, so each person experiences only one level of the independent variable.
- 3
Give two strengths of an independent groups design.
Model answer
There are no order effects because nobody does the task twice, and participants are less likely to guess the aim, which reduces demand characteristics.
- 4
Give two weaknesses of an independent groups design.
Model answer
Differences between the people in each group may cause the results rather than the independent variable, and twice as many participants are needed for the same amount of data.
- 5
What is random allocation and why is it used in an independent groups design?
Model answer
It means assigning participants to conditions by chance, for example by drawing names, so that participant variables are spread evenly across the groups instead of piling up in one of them.
- 6
What is a repeated measures design?
Model answer
The same participants take part in every condition, so each person provides data at every level of the independent variable.
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