Clear associations have emerged between conscientiousness and health behaviours, such that higher levels of conscientiousness are predictive of beneficial health behaviours. This study investigated the conscientiousness-fruit and vegetable consumption relationship and whether behavioural intention mediated this relationship. A large sample of adults (N = 2136) completed an online battery of questionnaires measuring conscientiousness, behavioural intentions to consume fruit and vegetables, together with self-reported behaviour. Correlation analysis revealed that conscientiousness and each of its facets were positively associated with behavioural intention and self-reported behaviour. Hierarchical multiple regression analyses revealed that after controlling for age, gender and education, total conscientiousness, and the facets of responsibility, industriousness, order and virtue predicted self-reported behaviour. Further analysis revealed that in line with the Theory of Planned Behaviour, behavioural intention fully mediated the conscientiousness-fruit and vegetable behaviour relationship. In conclusion, low levels of conscientiousness were found to be associated with lower fruit and vegetable intentions, with the latter also associated with fruit and vegetable consumption.

High conscientiousness is associated with better health and longer life. This relationship is partly accounted for by the performance of health behaviours. The current study aimed to investigate whether conscientiousness was associated with adherence to national health behaviour guidelines as an indicator of healthy lifestyle. A cross-sectional design was used, where participants (N = 886) completed online questionnaires to assess conscientiousness and the facets of conscientiousness (order, virtue, traditionalism, self-control, responsibility, industriousness) and the performance of four health behaviours (fruit and vegetable consumption, alcohol intake, smoking, and physical activity). An index was calculated to combine the health behaviours. Conscientiousness and all its facets significantly predicted the health behaviour guideline index. In comparing high and low conscientious sub-groups, the low conscientious group had lower levels of adherence to all health behaviours guidelines measured. Strikingly, the number of high conscientious participants meeting all health behaviour guidelines was nearly twice the number of low conscientious participants meeting all guidelines. Conscientiousness is associated with adherence to multiple national health behaviour guidelines. Therefore, the positive associations between conscientiousness and health/longevity may be accounted for, in part, by the adoption of a healthy lifestyle across multiple health domains.

PurposeStress may play a role in explaining part of the conscientiousness-longevity relationship. Conscientiousness (C) is associated with the appraisals of stressors and its lower-order facets have been shown to differentially moderate the experience of stress in daily life. This study investigated whether the lower-order facet, self-control (SC), moderated the relationship between stress appraisals and blood pressure responses to a laboratory stressor.MethodsNinety participants (selected from the upper and lower quartiles for C scores from a sample of 679 participants) were invited to complete the Maastricht Acute Stress Test (MAST). Systolic blood pressure (SBP) and diastolic blood pressure (DBP) were assessed throughout the stress task. Stress appraisals were assessed at baseline.ResultsBlood pressure responses to the MAST were similar in participants who scored high and low in SC. However, primary appraisals were negatively associated with BP reactivity and recovery in the high SC group but not in the low SC group. Moreover, SC was found to moderate the relationship between primary appraisals and SBP and DBP reactivity values, such that higher primary appraisals were associated with lower BP reactivity in individuals high in SC but not in those low in SC. In addition, lower SBP recovery values were observed in the high SC group compared to their low SC counterparts.ConclusionsThese findings indicate that SC may influence health status by modifying the relationship between perceived demands and blood pressure. Moreover, having a greater stake in stressors may yield health benefits in the longer term for individuals high in SC.

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