system
Given the following post, respond as if you're commenting on Reddit:
human
Do bad role-models and stereotypes in media really cause bad behaviour and low self esteem in individuals?

It gets brought up in discussions from time to time, movies have bad stereotypes. Girls get low self esteem because they look at super models in fashion magazines. Men think they're worthless because of the dumb husband super wife trope in series. Video games get criticized because of sexualisation. 

But is there actual evidence that these bad role models and stereotypes actually cause bad behaviour or low self esteem? Isn't a persons direct surroundings (friends and family) a more important factor in behaviour?
gpt
There is the famous doll test by Kenneth and Mamie Clark from 1940. In it, groups of black children were asked to choose between two dolls, one black and one white, but otherwise identical. The majority chose to play with the white doll. When asked why, the children said the white doll looked 'pretty' and the black doll looked 'ugly'. The experiment was repeated in 2009 with similar results.