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  • Codebook to a qualitative study on barriers and facilitators to participation in a dyadic internet intervention to manage work-family conflict

    Codebook to a qualitative study on barriers and facilitators to participation in a dyadic internet intervention to manage work-family conflict as reported in: Smoktunowicz E, Maciejewski J, Lesnierowska M, Ziolkowska J, Roczniewska M. Doing it together: Qualitative study on barriers and facilitators to dyadic internet interventions for interrole conflict. Internet Interv. 2025 Oct 3;42:100880. doi: 10.1016/j.invent.2025.100880. PMID: 41113765; PMCID: PMC12529352.
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  • Dataset 1 of the project "Meaning-reconstruction process in cancer: the role of psychological flexibility. Intensive longitudinal and experimental studies"

    The dataset is a part of a larger data collection, study 1 of the project: Meaning-reconstruction process in cancer: the role of psychological flexibility. Intensive longitudinal and experimental studies (National Science Centre, Poland, grant No. 2020/39/B/HS6/01927 awarded to Aleksandra Kroemeke). This folder contains the following files: - [File_1.csv]: This file contains the dataset that included following main variables: meaning-related distress, meaning-making, meanings made, and physical and emotional well-being. - [File_2.xlsx]: This file contains the codebook that contains information on variables used in the study. Further information on the study can be found here: Kroemeke A, Dudek J, Sobczyk-Kruszelnicka M (2022). The role of psychological flexibility in the meaning-reconstruction process in cancer: The intensive longitudinal study protocol. PLoS ONE 17(10): e0276049. https://doi.org/10.1371/journal.pone.0276049.
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  • 2026-03
    closedaccess

    Numerical stability of the symplectic LLT factorization

    Rozložník, Miroslav
    Smoktunowicz, Agata
    Smoktunowicz, Alicja
    In this paper we give the detailed error analysis of two algorithms W1 and W2 for computing the symplectic factorization of a symmetric positive definite and symplectic matrix AeR2n*2n in the form A=LLT , where LeR2n*2n is a symplectic block lower triangular matrix. We prove that Algorithm w2 is numerically stable for a broader class of symmetric positive definite matrices AeR2n*2n . It means that Algorithm W2 is producing the computed factors L in floating-point arithmetic with machine precision u such that A - LLT//2=0(n2u//A//2) . On the other hand, Algorithm W1 is unstable, in general, for symmetric positive definite and symplectic matrix A . In this paper we also give corresponding bounds for Algorithm W1 that are weaker. We show that the factorization error depends on the conditioning of the principal submatrix A11eRnxn, located in the upper-left block of A . Bounds for the loss of symplecticity of the lower block triangular matrices L for both Algorithms W1 and W2 that hold in exact arithmetic for a broader class of symmetric positive definite matrices A (but not necessarily symplectic) are also given. The tests performed in MATLAB illustrate that our error bounds for considered algorithms are reasonably sharp.
    Pozostałe osiągnięcia naukoweArtykuły (zamknięty dostęp)Journal article
  • 2026
    cc-by-nc-sa

    Narcissistic admiration and rivalry, Machiavellianism and willingness to engage in unethical pro-organisational behaviour (UPB)

    BACKGROUND This survey of Polish employees replicates research on the relationship between narcissism, Machiavellianism and unethical pro-organisational behaviour (UPB) that was previously conducted in other countries such as China, Pakistan and the US. Positive associations between narcissism, Machiavellianism and UPB were expected to occur. PARTICIPANTS AND PROCEDURE The survey covered 250 people working in large corporations across Poland. The sample included 163 women (65%) and 87 men (35%). Narcissism was measured with the NARQ questionnaire, developed as an operationalisation of the narcissistic admiration and rivalry concept (NARC). The MACH-4 scale was used to measure Machiavellianism. Readiness for UPB, on the other hand, was measured using the Polish version of the UPB Scale. RESULTS The research showed statistically significant positive relationships between narcissistic admiration, rivalry and Machiavellianism and the readiness to engage in UPB. At the same time, narcissistic rivalry and its components aggressiveness and striving for supremacy, and Machiavellianism correlate most strongly with UPB. Regression and mediation analyses showed that the significant variables to predict higher levels of readiness to engage in UPB are rivalry (aggressiveness) and Machiavellianism. Machiavellianism, moreover, appears as a mediator in the positive relationship of rivalry and its components (devaluation of others, striving for supremacy) with UPB. CONCLUSIONS Significant predictors of UPB are narcissistic rivalry, including aggressiveness, and Machiavellianism. A Machiavellian strategy may enable UPB to be undertaken by those with a tendency to dominate and devalue others.
    Otwarty dostępArtykułyJournal article
  • cc-by-nc

    From Insecurity to Exchange: Attachment Anxiety and Avoidance Predict Exchange Orientation via Different Psychological Mechanisms.

    Across three studies (N = 2,309), we examined the relationship between attachment insecurity and aspects of exchange orientation. Study 1 showed that attachment anxiety was related to exchange orientation toward romantic partners and acquaintances, and calculative mindset, whereas attachment avoidance was related to exchange orientation toward romantic partners and a calculative mindset. Preregistered Study 2 replicated these links longitudinally. Preregistered Study 3 revealed distinct mechanisms: need for cognitive closure mediated the link between anxiety and exchange orientation, while desire for control mediated the link between avoidance and exchange orientation. Together, we show that exchange orientation functions as a compensatory mechanism, providing predictability and alleviating uncertainty for individuals with high attachment anxiety and preserving autonomy for individuals with high attachment avoidance.
    Otwarty dostępArtykułyJournal article
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