What did early research by LaPiere (1934) and Corey (1937) suggest about the relationship between attitudes and behaviour?

Question

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Early research by LaPiere (1934) and Corey (1937) suggested that attitudes do not always predict behaviour, as LaPiere found that despite negative attitudes towards Asians, hotels and restaurants still served him, while Corey found that most people did not actually follow through on their intentions to vote.

What Did Early Research by LaPiere (1934) and Corey (1937)