pro: rutter did not decide which children were adopted/not
means it was ethically sound as it happened naturally
con: zeanah had say in which children went into orphange/fostered
breaks ethical issues as those who stayed in orphange have disorganised att breaking protection from psychological harm
whilst its more ethically sound to use naturally occuring sample reserch into this area does not protect childrens rights
still places them at risk
may be more ethical ways to research
e.g using correlational anaylsis/secondary data to avoid manipulation