Abstract
Analytic description, according to members of the Lvov-Warsaw School like Czeżowski, Ajdukiewicz, Ossowska, Tarski is a powerful and an indispensable tool, not only in philosophy but also in any natural science – in psychology especially. It should be equally respected together with empirical analysis and even it is recommended that it should precede any further research. Therefore the book Analiza i konstrukcja: o metodach badania pojęć w Szkole Lwowsko-Warszawskiej [Analysis and construction: on the methods of researching concepts in the Lvov-Warsaw School] can be recommended to philosophers as well as scientists.