Harlow's study

• Animal studies

  Humans have more complex attachments than monkeys.

  However monkey's are closer to humans than Geese so findings may be more easily extrapolated.
• Ethical issues

  Separation of the baby monkeys caused a lot of stress and later psychological harm could not form relationships.
• Research is justifiable

  Influenced Bowlby's maternal deprivation hypothesis.

  This may justify the unethical nature of the study.