An important distinction is drawn in psychology between explicit and implicit knowledge. Explicit knowledge refers to consciously held beliefs about an individual or object that often draws on the remembering of experiences in the past. In contrast, implicit knowledge refers to the cognitive associations a consumer holds between two constructs that exist outside his or her conscious awareness. Although it is possible that explicit and implicit knowledge correspond, the exciting opportunity for marketers is that often there is a discrepancy; that is, what a consumer believes explicitly may have no bearing on his or her actual behavior.

Summarizes selected research on music and its impact on mood and shopping behavior, and its impact on the communication of ideas.