Procedures

• What sampling method was used in the biological approach study?

  Opportunity sampling
• What was the purpose of the PET scan in the study?

  To study the active brain
• What is the role of the 'tracer' in the PET scan?

  It is taken up by active brain areas
• How did the researchers compare the brains of NGRI participants and control group participants?

  By using the tracer uptake in PET scans
• What task were participants asked to perform during the study?

  A continuous performance task (CPT)
• What was the aim of the continuous performance task (CPT)?

  To activate target areas of the brain
• When did participants start the CPT in relation to the FDG injection?

  30 seconds before the FDG injection
• Why did participants practice the CPT before the FDG injection?

  To avoid initial task novelty affecting results
• How long after the FDG injection was the PET scan conducted?

  32 minutes
• How many horizontal slices of the brain were recorded during the PET scan?

  10 horizontal slices
• What techniques were used to record the brain slices?

  Cortical peel and box techniques
• Why was it important for the article to provide precise details of scanning techniques?

  So the study could be replicated