This experimented proposed to test the relationships between self-reported hostility and both facial muscle tone and cardiovascular functioning. Based on previous research, it was proposed that individuals high in self-reported hostility would show increased cardiovascular reactivity in response to a physical stressor (the cold-pressor task). Additionally, based on the integration of multiple lines of research, it was proposed that individuals with high levels of self-reported hostility would show asymmetric facial tone, with greater muscle activation at the left-hemiface. Results showed increased cardiovascular responding in the high-hostile participants following exposure to the cold-pressor task. Additionally, the individuals with high levels of self-reported hostility did show asymmetric facial tone, with increased left-hemifacial EMG values. These differences were present prior to exposure to the cold-pressor task, and were increased following the stressor. Results supported the literature showing increased cardiovascular responding to stress in high-hostile individuals, and also supported the proposed relationship between right orbitofrontal functioning and hostility. / Ph. D.

This study investigated the roles of negative affect and cardiovascular reactivity on the attributional responding of hostile males. College males were screened with the Cook-Medley Hostility Scale (Cook & Medley, 1954). High and low hostile males were assigned to an arousal inducing (serial subtraction by 7's) or a non-arousal inducing condition (serial subtraction by 1's). Cardiovascular reactivity and self-report of affect were measured to the serial subtraction task. After the task was completed, the participant listened to a vignette (provocative or neutral) which depicted an interpersonal situation. The participant answered questions about the scene to assess attributional responding. The arousal-inducing condition was associated with significantly greater changes in systolic and diastolic blood pressure and heart rate and a higher level of self-reported negative affect than the non-arousal inducing condition. More negative attributions were reported for provocative than neutral scenes. Males in the arousal inducing condition made more negative attributions to neutral scenes than males in the non-arousal condition. There was no significant effect of arousal condition on the negative attributions to provocative scenes. Hostility did not influence the relationship between arousal condition and self-reported affect or arousal condition and attributional responding. This study showed that inducing cardiovascular reactivity prior to a neutral encounter with a partner can affect the males' perception of the potentially neutral encounter. / Master of Science

Anxiety and worry have been related to exaggerated cardiovascular reactivity and delayed recovery to laboratory stressors, and to increased risk of cardiovascular disease. This study examined cardiovascular responses in high and low worriers to a range of laboratory tasks. The aim of this study was to determine if there is a task-specific relationship between worry and aberrant cardiovascular responding. Forty-one undergraduate women were recruited online to form low and high worry groups by use of the Penn State Worry Questionnaire. Four common laboratory tasks and two conditions designed to elicit worry and relaxation were used: hand cold pressor, mental arithmetic, orthostatic position, supine position, worry imagery, and relaxation imagery. Heart rate, heart rate variability, impedance cardiography, and blood pressure indices were collected to assess task reactivity and recovery, particularly in relation to autonomic nervous system activity. The high worry group had significantly higher heart rates throughout the study. The low worry group presented increased cardiovascular recovery to various tasks. The high worry group during task and post-task periods also increased parasympathetic withdrawal and sympathetic activation. The results of the study suggest that high worriers have decreased vagal control of the heart. The implications of this study suggest a potential link between the post-task period in high worriers and cardiovascular disease. Further research is recommended. / Master of Science

Defensive hostility has been attributed as an early risk factor of coronary heart disease. The autonomic characteristics of high defensive, high hostile (HD) and low defensive, high hostile (LD) men and women were assessed with a variety of cardiovascular (CV) measures. Reactivity and recovery to an active laboratory stressor (video game, VG) and a passive laboratory stressor (hand cold pressor, CP) of 15 HD men, 16 LD men, 16 HD women, and 16 LD women were recorded. It was predicted that the CV patterning associated with the HD participants would display more sympathetic and less vagal control as well as the least pronounced recovery from the stressors in comparison to LD participants. Results revealed differential CV responses to the lab tasks by group. HD women displayed consistently high levels of low frequency power heart rate variability (HRV) during baseline and across conditions. HD men exhibited significantly pronounced heart rate reactivity and reduced high frequency power HRV to the CP task in comparison to LD men. Interestingly, LD women displayed weaker blood pressure (BP) recovery to the VG in comparison to HD women, whereas the opposite pattern was observed in BP recovery to the CP. These results suggest that defensiveness and sex may moderate the CV reactivity and recovery to different types of stressors in hostile participants. / Master of Science

The role of mainstream media in women’s views of female beauty and body image has been well documented. However, few published studies have observed ethnic differences in physiological stress reactivity that may occur from pressures to comply with a particular image of beauty. This study examined whether the exposure to the mainstream ideal body image would negatively affect Latina women’s physiological and psychological functioning, and how their responses differed in comparison to their White counterparts. Participants included college-aged female students from Pitzer College who self-identified as Latina or Caucasian. Participants completed questionnaires assessing, body esteem (MSBRQ-AS; SATAQ; CDFRS), ethnic identity (SEE), state anxiety (STAI-State) and affect (PANAS) prior to and following exposure to Victoria’s Secret or Chrysler automobile commercials. Physiological stress reactivity was assessed through changes in systolic and diastolic blood pressure, as well as salivary cortisol. 3-way ANOVA tests indicated a significant 2-way interaction between condition and time on participants’ levels of diastolic blood pressure, F(1, 27) = 4.266, MSe = 29.803, p =.049, η2 =.136, as well as ratings of appearance evaluation, F(1,36) = 5.733, MSe = 3.692, p =.022, η2 =.137, and body satisfaction F(1,36) = 4.27, MSe = 4.747, p = .046, η2 =.106. Women who viewed the Victoria’s Secret commercials demonstrated increased levels of diastolic blood pressure and reported lower ratings of body esteem in comparison to women who viewed the Chevy Sonic commercials. Potential trends in anxiety reactivity and the internalization of mainstream female beauty in Latina women following exposure to the stimuli are further discussed.

Social support has been linked to positive health outcomes. Specifically, having available support from a friend may act as a buffer to the negative effects of stress on cardiovascular reactivity. Relationship quality is an important moderator of this effect. The purpose of this study was to examine how cardiovascular reactivity is affected by relationship quality within friendships and whether the length of relationship and frequency of contact may moderate the effect. 134 healthy male and female adults (and their same-sex friend) were recruited to participate. Results revealed no significant difference between subjects interacting with supportive friends compared to interacting with ambivalent friends on cardiovascular reactivity. Length of relationship was independently associated with higher cardiac output (CO) and lower total peripheral resistance (TPR), but there was no statistical interaction between length of relationship and relationship quality. Frequency of contact was not a significant predictor of cardiovascular reactivity and no statistical interaction was found between frequency of contact and relationship quality. This study provides some evidence that length of relationships may be important to consider in future studies examining stressful relationships.

Mindfulness has historically been cultivated via formal meditation practice and the majority of meditation research examines individuals with extensive training or participants in Mindfulness based stress reduction programs that require considerable expense, a trained facilitator, and take approximately 8 weeks to complete. However, current literature does not speak directly to those who do not have the time or ability for such commitments. Formal mindfulness meditation practice and interventions reduce stress in various populations; however, the outcomes of a one-time intervention are relatively unknown. This study aims to examine whether a one-time (20-min) mindfulness meditation intervention would improve cardiovascular variables during acute stressors in a meditation naïve sample when compared to a control group. Fifty-eight (58) normotensive undergraduate students (27 males, 31 females) with no prior meditation experience were randomly placed into either a treatment group that participated in one-time 15-minute audio training session on mindfulness meditation or a control group which listened to an audio health article. Following the training, participants participated in a psychosocial stressor modeled after the Trier Social Stress Test. Heart rate and blood pressure were assessed before and after the intervention and during the stress task. Results showed the mindfulness meditation condition group was effective in decreasing blood pressure response during the study, when compared to the control group. These results indicate that brief meditation training has beneficial effects on cardiovascular variables. These findings suggest that the benefits of a brief one-time mindfulness meditation intervention can be recognized immediately after a brief training treatment.

No description available.

No description available.

No description available.