Lorenz: imprinting
Lorenz: procedure
Lorenz: findings
Lorenz: sexual imprinting
Lorenz AO3: generalisability (weakness)
Lorenz AO3: observations questioned (weakness)
Harlow: procedure (1958)
Harlow: findings
Harlow: maternally deprived monkeys as adults
Harlow: critical period
Harlow AO3: theoretical value ( strength)
Harlow AO3: practical value ( strength)
Harlow AO3: ethical issues (weakness)