The present study investigated the possible interaction between life events stress and personality in predicting cardiovascular stress responses. Participants (N = 184) completed psychometric measures of life event stress and personality styles and had cardiovascular responses monitored during a standardised stress testing protocol. In adjusted models, the observed blunted association between life event stress and SBP and DBP was moderated by openness; this was more evident at -1SD below the mean openness value. Further, the association between life event stress and TPR vascular resistance was found to be moderated by conscientiousness. In particular, we found conscientiousness at both the mean and 1SD above the mean buffered against the negative impact of life stress on TPR reactivity. The findings are discussed in relation to theory and future directions.

Anxiety Stress and Coping;33 (4), Licence Licence This work is made available under the CC BY-NC-SA 1.0 licence and should only be used in accordance with that licence. For more information on the specific terms, consult the repository record for this item.

Type D personality has been consistently associated with adverse cardiovascular health with atypical cardiovascular reactions to psychological stress one potential underlying mechanism. As Type D individuals have been noted to report lower social support and greater perceptions of negativity in social interactions, this study examined if the association between Type D personality and cardiovascular reactivity was mediated by these social relationships. A sample of 195 undergraduate students (138 female) participated in this observational study, where they completed measures assessing Type D personality (DS14), social support, and perceptions of negative social relationships (National Institute of Health social relationship scales), before undergoing a traditional cardiovascular reactivity protocol. Systolic and diastolic blood pressure (SBP; DBP), heart rate (HR), cardiac output (CO), and total peripheral resistance (TPR) were monitored throughout. ANCOVAs and regressions indicated that Type D personality was associated with lower cardiovascular reactivity to a mental arithmetic stressor. Furthermore, mediation analyses (process macro) indicated that the relationship between Type D personality and cardiovascular reactivity was mediated via increased perceptions of negative social relationships, as well as lower levels of social support. Apart from a significant association between Type D personality and increased HR reactivity, all results failed to withstand adjustment for the individual effects of negative affect (NA) and social inhibition (SI) in controlled analyses. Overall, these findings suggest that the predictive utility of Type D personality on cardiovascular reactivity above and beyond the individual effects of NA and SI is limited, and may vary depending on the cardiovascular parameter of focus.

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It is argued that the Type D person experiences increased distress when encountering social situations, which results in altered stress responding. However, little is known about how Type D individuals behave or feel during social interactions. Using a within-subjects design, the present study examined the physiological arousal of Type D and non-Type D individuals when rating how they would deal with a number of hypothetical social situations. Results showed that across all social situations, Type D individuals experienced greater levels of discomfort. In clearly negative and ambiguously neutral situations, this was paired with higher pulse rate. This study shows that the Type D individual not only reports greater discomfort but also experiences changes physiologically that support the role of the cardiovascular system as a potential psychosomatic pathway to disease.