EN
The main aims of the article are as following: (1) indicating that (properly determined) constructivist perspective is able to model cognition (and especially the conditions of the effectiveness of laboratory practices) in a satisfactory way, (2) reconstructing the latest tendencies within the science and technology studies that impel us to use towards them rather the term (post)constructivism than the notion of social constructivism, (3) showing how the (post)constructivist standpoint conceptualises technoscience.