Quantum decision theory (QDT) is a recently developed theory of decision making based on the mathematics of Hilbert … decision making. QDT describes a decision maker's choice as a stochastic event occurring with a probability that is the sum of … subjectivity on decision makers, the quarter law. We examine individual and aggregated (group) data, and find that the results are …

the relative standing of their group among other groups. On average, individuals exhibit overconfidence bias in both types …, the salience of between-group judgments should mitigate within-group overconfidence. Our second hypothesis is that within …-group overconfidence is reduced in the presence of group identity. Using a 2×2 between-subject design, we test, and find strong support for …

One apparent reason for deferring a decision – abstaining from choosing, leaving the decision open to be taken by … an axiomatic theory of decision in situations where a costly deferral option is available that captures this source of …