The article presents the results of radon research, carried out in the area of the mining commune in the Upper Silesian Coal Basin (USCB), Poland. Past investigations in the 1990s on radon concentrations in buildings, located within the mining area, showed that the indoor radon concentrations measured in the area affected by mining were higher than in buildings located outside that area. Currently, all underground hard coal mines within the boundaries of the observed commune have been closed. In 2020, after the closure of the last active mine, radon measurements were started again. The current results of indoor radon concentrations were compared with the archival results from the 1990s. It was found that the radon concentration increased significantly in the basements of buildings where measurements were made in 1990, 2020, and 2021: the maximum values were 260 Bq/m³, 644 Bq/m³, and 1041 Bq/m³, respectively. Therefore, these questions were posed: Do the mine closure processes increase radon migration? How long is the period of the occurrence of changes in radon concentrations in buildings after the cessation of mining operations?

The Level of Dogmatism in Schizophrenia. A Comparative Analysis of Utterance Texts with the Use of the Suitbert Ertel Dogmatism Quotient: The paper describes the results of comparative research on the level of dogmatism in the utterance texts of patients diagnosed with paranoid schizophrenia (N=130) and healthy individuals (N=130). The analysis was conducted with the use of the Suitbert Ertel Dogmatism Quotient. The results indicate significant differences between these two groups.

The main source of radon penetrating buildings is the ground. Both the concentration of natural radioactive nuclides and the physical properties of soil and rock, which facilitate the migration of radon, are important. In the Upper Silesian Coal Basin (Poland), many years of mining activity have caused the disintegration of the geological environment, hydrological disturbances, and damage to buildings located within continuous and discontinuous deformation areas. These phenomena may facilitate the transport and penetration of radon into residential and workplace premises. This paper presents a risk assessment of elevated radon concentrations based on a multifactorial analysis, taking into account hazards caused by mining activities, as well as natural and technical factors. A set of criteria and an assessment of the significance of each criterion were proposed, adopting ranges of values and limits established by regulations or determined arbitrarily. Model validation calibrated through a series of in situ measurements demonstrated an overall classification accuracy of 67%, with a low false negative rate (6%), which is particularly important for environmental risk assessment. In addition, the Cohen’s kappa coefficient increased from 0.12 to 0.36 after model calibration, indicating improved agreement between theoretical predictions and field measurements. The proposed approach can therefore be used as a preliminary screening tool for identifying radon-prone areas in mining and post-mining regions and for supporting the planning of targeted in situ radon measurements.