In my view, emotions are to blame for much - maybe most, maybe all - consumer decision making in ways that are largely subconscious.
The placebo effect is emotion driven.
It is inevitable that decisions get made about the purchase of any and maybe all products that are driven by factors intrinsic to psychological projection of personal needs and desires as opposed to any objective assessment of the characteristics of the product itself. The task of the consumer is to keep that process to a minimum, the task of the advertiser is to inflate the process, and the placebo effect is one of his or her tools.
well said, and spot on imo