Article. Advances in Physical Science . — 2005. — Volume 175. — No. 4 . — C. 413-435. Conceptual problems of quantum measurement theory are considered, which find their expression in the known paradoxes, as well as in Bell’s inequalities. Arguments are made that it is hardly possible to solve these problems without the direct inclusion of the observer’s consciousness in the theoretical description of the quantum dimension. In this regard, the so-called multi-world interpretation of quantum mechanics is discussed. proposed by Everett, as well as the expansion of Everett's concept, This is ,. that the quantum state is divided into components, Complying with alternative measurement results, not only communicates with the consciousness of the observer, He is fully identified with it.... It is shown that this approach opens up qualitatively new prospects for combining physics and psychology and, more broadly, the natural science and humanitarian spheres of knowledge. This can lead to an expansion of the theory of consciousness and shed light on important and still not understood phenomena in the field of consciousness.