The Attitude-Behaviour Gap: Why We Say One Thing But Do The Opposite:
"....At that time in the US there had been lots of stories in the media about how prejudiced people were against Chinese people.
Social Psychologist, LaPiere (1930) started to wonder why there was such a gap between what the newspapers were reporting about people's attitudes and their actual behaviour. To check this out he decided to send out a questionnaire to the restaurants and hotels they had visited along with other similar places in the area (LaPiere, 1934).The questionnaire asked the owners about their attitudes, with the most important question being: "Will you accept members of the Chinese race in your establishment? Incredibly 90% of respondents answered, no, they wouldn't accept members of the Chinese race into their establishments."