Case Studies: Phineas Gage, Paul Broca, and Carl Wernicke; provide valuable insights into brain function and localisation, enabling ethical behaviour studies, but issues with generalisability, reliability, and control arise
Issues
Individual:
Variation in...
Neurotransmittersensitivity
Receptorsite number
Influenced by geneticmakeup + enzymerelease
Despite same brain structure
Developmental:
Hormones important in human development
Sex hormones: oestrogen + androgens, particularly, testosterone
