How much information do you need to make up your mind? Our research in various domains of decision making shows that we make decisions more quickly and based on less information than we think. This has important implications in an age in which information is plentiful.
A common interpretation in behavioural finance is that rationality is the result of a pure cognitive process which can be behaviourally biased. While cognitive biases are influences that affect rationality from within the cognitive system, affective biases refer to those influences that affect the cognitive system from outside. Unfortunately, the assumption that rationality is a pure cognitive process is not well motivated. Rationality results from the intrinsic interaction between cognition and emotions.
