Exam practise
Psychologists carried out a laboratory experiment to investigate the effectiveness of cognitive interviews.
All participants watched the same film of a robbery. They were randomly allocated to Group One or
Group Two. Participants were then asked to recall the robbery. The investigators used a cognitive
interview to access recall of participants in Group One and a standard interview to access recall of
participants in Group Two.
Based on the question and the diagram, answer the following questions:
1. What experimental design was used in the experiment? (1)
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2. Give one limitation of this design. (2)
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3. What is meant by the term investigator effect? Explain the possible investigator effect in this study (4)
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____________________________________________________________________________________________
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Psychologists carried out a laboratory experiment to investigate the effectiveness of cognitive interviews.
All participants watched the same film of a robbery. They were randomly allocated to Group One or
Group Two. Participants were then asked to recall the robbery. The investigators used a cognitive
interview to access recall of participants in Group One and a standard interview to access recall of
participants in Group Two.
Based on the question and the diagram, answer the following questions:
1. What experimental design was used in the experiment? (1)
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
2. Give one limitation of this design. (2)
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
3. What is meant by the term investigator effect? Explain the possible investigator effect in this study (4)
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
____________________________________________________________________________________________
