Personality

phrenology

physiology

somatology

physiognomy

male, female,

female, male

fraternal, identical

identical, fraternal

sense of humour

openness to experience

conscientiousness

extraversion

neuroticism

agreeableness

extraversion

conscientiousness

decrease, increase

hide, reveal

increase, decrease

reveal, hide

genes

neurons

glia

instincts

non-existent

weakest in early childhood

strongest in early childhood

consistent across the lifespan

ego, id, superego

unconscious, moral, immoral

oral, anal, phallic

primary, secondary, tertiary

the extent to which geneticists can modify people’s behaviour

the possibility of eradicating behavioural problems in children

the genetic and environmental influences on human behaviour

the ability of animals to learn language

aggressive, sexual

sexual, aggressive

pleasure, reality

reality, pleasure