Final answer:
LaPierre found that restaurants and hotels would not serve a Chinese couple, but actually served them, which suggests that attitudes do not alert people to inconsistencies in their thinking.
Step-by-step explanation:
In the 1930s, LaPierre examined questionnaire responses and behavioral responses to a Chinese couple and found that most restaurants and hotels indicated in writing that they would not serve a Chinese couple, but actually served them. This suggests that attitudes do not serve to alert people to inconsistencies in their thinking.