Abstract
The article informs on initial findings in a relatively new area of the psychological research on human decision making. Namely, it is the research on the influence that the composition of the choice set (the,,menu") exerts on the decision maker's preferences between given two alternatives.
First, the article describes two decision making principles to which decision making in such cases should adhere. Next, several empirically observed effects are described that violate these principles.
The conclusion suggests some important applications of the findings in medicine, politics and marketing.