Quantum-like Decision Making and Disjunction Effect

In this chapter we offer the QL representation of the probabilistic data obtained in two famous experiments in cognitive psychology: Shafir-Tversky [275] and Tversky-Shafir [295]. These experiments demonstrated violation of Savage’s Sure Thing Principle (STP) [271]). This violation was called by Shafir and Tversky the disjunction effect, see also also Rapoport [266], Hofstadter [145, 146] and Croson [71].