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    "doi": "10.1371\/journal.pone.0343047",
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    "title": "Moderating effect of temperaments between borderline personality traits and mood instability among a sample of Lebanese adults",
    "authors": [
        "Emmanuelle Awad",
        "Diana Malaeb",
        "Fouad Sakr",
        "Mariam Dabbous",
        "Souheil Hallit",
        "Feten Fekih-Romdhane",
        "Sahar Obeid"
    ],
    "container": "PLOS One",
    "year": "2026",
    "doi_url": "https:\/\/doi.org\/10.1371\/journal.pone.0343047",
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    "oa_status": "gold",
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    "abstract": "OBJECTIVE: The aim of this study is to explore the moderating role of different affective temperaments in the relationship between Borderline Personality traits (BPT) and Mood Instability (MI) among a sample of Lebanese adults. METHODS: This cross-sectional study was conducted in Lebanon in May 2025. An online survey that included the Mood Instability Questionnaire - Trait Short Form (MIQ-T-SF), Temperament Evaluation of Memphis, Pisa, Paris, and San Diego - Modified (TEMPS-M), and McLean Screening Questionnaire for Borderline Personality Disorder (MSI-BPD) was used to collect data. RESULTS: A total of 872 participants completed the survey, with 66.9% being females and a mean age of 26.97 years. The interactions between borderline personality traits and depressive\/cyclothymic\/hyperthymic\/anxious temperaments were associated with increased mood instability. Higher borderline personality scores were associated with lower (Beta = -0.50; p < 0.001) and higher (Beta = 0.39; p = 0.016) mood instability scores at low and high levels of depressive temperament respectively. Higher borderline personality scores were associated with lower mood instability scores (Beta = -0.51; p < 0.001) at low levels of cyclothymic temperament respectively. At moderate (Beta = 0.67; p < 0.001) and high (Beta = 1.41; p < 0.001) levels of hyperthymic temperament, higher borderline personality scores were associated with higher mood instability scores. Higher borderline personality scores were associated with lower (Beta = -0.37; p = 0.008) and higher (Beta = 0.40; p = 0.012) mood instability scores at low and high levels of anxious temperament respectively. The irritable temperament did not moderate the relationship between borderline personality traits and mood instability. CONCLUSION: This study emphasizes the nature of the relationship between affective temperaments, BPT, and MI. These findings are especially important for the Lebanese population, threatened by a rising psychopathology prevalence.",
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