Why, during a decision between new alternatives, do people bias their evaluation of new information to support a tentatively preferred option? We test three decision process goals as the potential drivers of such predecisional distortion of information: (a) to reduce the effort of integrating...

We show how decision makers can be induced to choose a personally inferior alternative, a strong violation of rational decision making. The binary choice process is traced to reveal the progress of the manipulation. First, the inferior alternative is installed as the leading option by starting...