It is proposed to consider a qualitative model of a person’s mental space as a decision support model. In contrast to the two-process model of D. Kahneman, the mental space model represents the image of the problem being solved (representation) in terms of human experience and various mechanisms for manipulating the elements of the image with the involvement of available knowledge and knowledge acquired on the Internet, which makes it possible to rebuild the initial representation before representing the solution. In this case, decision support is aimed not at combating cognitive distortions, but at supporting the structural characteristics of the mental space, which provide high intellectual productivity of the decision-maker.