Elaboration Likelihood Model (ELM)
A model of attitude formation and change that proposes that the process by which attitudes change depends upon the message recipient's level of motivation. According to Petty and Cacioppo, the authors of the ELM, when motivation is high, the message recipient will pay attention and respond to the quality of message arguments. When motivation is low, the message recipient will be more responsive to peripheral elements of the message (e.g., music, spokesperson attractiveness, etc.).