Brain Scanning in Biological Psychology

• What is the purpose of CAT scans in biological psychology?

  To provide detailed brain images and monitor treatments
• How does a CAT scan generate images of the brain?

  It takes x-rays at various angles and uses a computer
• What is the spatial resolution of CAT scans?

  0.3-0.6 mm
• What is the temporal resolution of CAT scans?

  0.27 seconds
• What is a weakness of CAT scans related to ethical issues?

  They expose individuals to significant radiation
• Why is it difficult to establish cause and effect with CAT scans?

  Because of the correlational nature of the data
• What do PET scans measure in the brain?

  Metabolic activity using a radiotracer
• How does a PET scan visualize metabolic activity?

  By detecting radiation from a flurodeoxyglucose tracer
• What colors indicate high and low glucose metabolism in PET scans?

  High is red, low is blue
• What is a strength of PET scans in research?

  They provide objective measures and quantitative data
• What is a weakness of task validity in PET scans?

  Tasks may not reflect real-life aggression
• What is the function of fMRI scans in biological psychology?

  To identify tumors and active brain regions
• How do fMRI scans detect brain activity?

  By measuring blood flow related to oxygen use
• What did Li et al. find using fMRI scans?

  A relationship between heroin use and brain function changes
• What is a strength of fMRI scans compared to other methods?

  They use advanced technology for precise detection
• What is a weakness of fMRI scans related to movement?

  They are heavily affected by patient movement
• What are the strengths and weaknesses of brain scanning methods in biological psychology?

  Strengths:

  • CAT scans provide detailed images
  • PET scans offer objective, quantitative data
  • fMRI scans detect small changes in brain structure

  
  

  Weaknesses:

  • CAT scans expose patients to radiation
  • PET scans have low task validity
  • fMRI scans are affected by movement
• What alternative method can be used to study aggression in biological psychology?

  • Twin studies, such as Brendgen's study
  • Investigates social and physical aggression
  • Separates genetic and environmental influences
• How can brain scanning methods be applied in treatment?

  • Early intervention for behavioral deficits
  • Pre-screening to identify potential issues
  • Formulating appropriate treatments for disorders