Loneliness, social support and cardiovascular reactivity to laboratory stress

Self-reported or explicit loneliness and social support have been inconsistently associated with cardiovascular reactivity (CVR) to stress. The present study aimed to adapt an implicit measure of loneliness, and use it alongside the measures of explicit loneliness and social support, to investigate their correlations with CVR to laboratory stress. Twenty-five female volunteers aged between 18 and 39 years completed self-reported measures of loneliness and social support, and an Implicit Association Test (IAT) of loneliness. The systolic blood pressure (SBP), diastolic blood pressure (DBP) and heart rate (HR) reactivity indices were measured in response to psychosocial stress induced in the laboratory. Functional support indices of social support were significantly correlated with CVR reactivity to stress. Interestingly, implicit, but not explicit, loneliness was significantly correlated with DBP reactivity after one of the stressors. No associations were found between structural support and CVR indices. Results are discussed in terms of validity of implicit versus explicit measures and possible factors that affect physiological outcomes.     

Blood Pressure and Emotional Responses to Stress: Perspectives on Cardiovascular Reactivity

It has long been thought that increases in blood pressure in response to stress are associated with emotional responses to stress. The health implications of such an association are clear; excessive emotional reactivity leads to excessive cardiovascular reactivity (CVR), which is associated with cardiovascular disease. However, the data do not support a strong association between CVR and emotional responses to acute stress. This lack of support has lead to research that interprets CVR to stress in at least three different ways: (1) as a potential contributor to disease development, (2) as an index of active coping, or (3) as a multidimensional construct that is affected by cognitive appraisals of a situation. In this article, we review these separate perspectives on CVR and suggest that a multidimensional perspective of CVR and emotional responding to stress may help integrate the CVR – health, effort, and appraisal points of view.     

Cardiovascular responses to agency and communion stressors in young women

Theory and research (Helgeson, 1994) suggest that women are particularly responsive to communion stressors (i.e., social relationship concerns) as opposed to agency (i.e., achievement and dominance concerns) and that women low in the trait of agency are vulnerable to stress. To test these hypotheses, 60 undergraduate women interacted with a pre-recorded partner; one-third provided support to an interaction partner (i.e., communion stressor), debated current events (i.e., agency stressor), or described a typical day (i.e., control task). Compared to controls, the debate task evoked greater systolic blood pressure and heart rate reactivity and related autonomic changes. Compared to controls, providing support evoked larger increases in cardiac sympathetic activation and reduced vascular resistance. Low levels of trait agency were associated with greater CVR overall. Hence, agency and communion stressors had distinct psychophysiologic effects. Although both tasks heightened reactivity, the agency task evoked cognitive and physiological responses consistent with threat, whereas the communion task evoked a pattern consistent with challenge.     

Does anxiety or cardiovascular reactivity have a causal role in hypertension?

Anxiety, stress, and cardiovascular reactivity (CVR) are variously believed to play a role in sustained hypertension. Although acute anxiety or stress elicits acute pressor responses, there is little support for their significant role in sustained hypertension. Anxiety correlates poorly with CVR, and blood pressure levels and anxiolytics do not sustain blood pressure lowering in subjects with hypertension-associated anxiety. Chronic anxiety disorders tend to be characterized by relatively low blood pressure and prevalence of sustained hypertension. Blood Pressure Regulation in hypertension is normal, and normo- and hypertensives have similar ambulatory blood pressure variability. Laboratory CVR fails to predict variability in natural environments, hyperreactors do not exhibit increased variability in natural environments, and the increased variability and ambulatory reactivity that is "accounted for" by laboratory responses is small. These findings do not support the belief that hypertension is related to a summation of heightened pressor responses over time. Antihypertensives normalize elevated blood pressures but do not alter CVR in the laboratory or variability in natural environments, probably because of a dual central regulation of resting and reactive blood pressures. Psychological stress responses result from selective neuronal activation rather than from generalized sympathetic neural responses or dysregulation. Differences in blood pressure responses during various emotions are only quantitative, with no specificity of sympathoadrenal or emotional responses to stressors. It may be time to regard reactive cardiovascular responses as physiological, rather than as psychological, and to require much stronger evidence to confirm causal roles of anxiety, stress, and reactivity in sustained hypertension.     

Perceived racism and cardiovascular reactivity and recovery to personally relevant stress.

This study evaluated cardiovascular responses (CVR) to an active speech task with blatantly discriminatory (BRC) versus neutral (NRC) stimuli and an anger recall task in a sample of Black men (N = 73; age 18 to 47). Diastolic blood pressure scores were higher for NRC versus BRC stimuli during anger recall (p = .05). Moreover, persons in the NRC group who perceived high levels of racism (vs. no racism or BRC group) during active speech showed larger increases in blood pressure across postspeech rest, anger recall, and subsequent rest (p = .03). The notable elevation in CVR in response to an ambiguous event extends current models of racism suggesting that subtle racism is a psychosocial stressor that erodes health through chronically elevated CVR.     

Gender Typing of the Successful Manager—A Stereotype Reconsidered

The feminization of management is a recurring theme in both popular and scientific management literature. However, several studies have shown that successful managers are generally attributed predominantly masculine characterics. In this study, gender typing of the manager role was studied in a sample of 143 management students (74 men, 69 women) in the Netherlands. As was hypothesized, on a checklist with masculine, feminine, and gender-neutral traits, masculine characteristics were rated as more applicable to successful managers than feminine characteristics, but gender-neutral characteristics were rated even more applicable. Analysis of the wording used to describe a successful manager on an open-ended question showed that participants used either gender-neutral words or (generic) “he.” This finding indicates that the successful manager is still imagined as a man, even though on a checklist this manager seems to possess predominantly gender-neutral traits. It is concluded that more methodological variety is needed in the study of gender typing of successful managers.     

Gender Differences in Biobehavioral Aftereffects of Stress on Eating,Frustration, and Cardiovascular Responses1

Eating, persistence, and cardiovascular responses were evaluated after exposure to a 25‐min noise stressor with or without perceived control. Participants were healthy men (n = 29) and women (n = 34), aged 21 to 45 years. There were no group differences in cognitive task performance or blood pressure during the stressor. However, perceived control resulted in lower mean blood pressure and heart rate after cessation of the stressor for men and women. Women without perceived control displayed greater frustration levels following the stressor, and frustrated women ate more bland food than did nonfrustrated women. Perceived control and frustration did not affect food consumption among men following the stressor. These findings indicate that there are health‐relevant gender differences in biobehavioral responses that occur in the aftermath of stressor exposure. In addition, perceived control was especially important for women to attenuate the behavioral and biological effects of stressor exposure.     

Psychophysiological reactivity to mental arithmetic stress in black and white normotensive men

Racial differences in physiological responses to a behavioral stressor were examined. Thirty-four Black and 42 White male normotensives 34 to 55 years old (mean age = 43.01 years) performed a mental arithmetic task while blood pressure, heart rate, and skin conductance were recorded. Compared to Whites, Blacks had significantly higher baseline diastolic blood pressure (77.93 mm Hg vs. 73.11 mm Hg) and lower skin conductance levels (11.08 microS vs. 12.25 microS). These effects persisted during performance of the mental arithmetic task. However, when baseline differences were covaried, there were no significant physiological effects associated with the task. Analysis of changes in response levels from baseline revealed a nonsignificant trend for Whites to show greater increases in systolic blood pressure than Blacks. There were no significant race or family history effects. Further, task performance did not influence the outcome. Failure to demonstrate greater cardiovascular reactivity in Blacks and all men with a positive family history of hypertension is discussed with regard to possible "survivor effects" and methodologic limitations.     

Heart-rate Reactivity and the Type A Behaviour Pattern in Three Age Groups of Australian Children

The relationship between the Type A Behaviour Pattern and heart-rate reactivity to the onset of a typical stressor was investigated with a sample of Australian boys and girls from three age-grade levels: preschool, middle-elementary, and upper-elementary. Behaviour Pattern was measured with the Matthews Youth Test for Health (Matthews & Angulo, 1980), and data were collected on children's second-by-second heart rate during rest and the stressor tasks. Reactivity to the onset of the stressor task (a puzzle game or mental arithmetic), was assessed. Results indicated that there were expected age differences in resting and stressor task heart rates, but that there was no significant difference in heart-rate reactivity between children classified as Type A or B Behaviour Pattern, either for the entire sample, for two extreme subsamples, or within each of the three age groups.     

The perception of available social support is related to reduced cardiovascular reactivity in Phase II cardiac rehabilitation patients.

OBJECTIVE: Numerous studies have observed a relationship between social support (SS) and post coronary event survival. Laboratory research suggests one mechanism regulating this relationship may be exaggerated cardiovascular reactivity (CVR). What has not been as well explored is (1) whether the SS-CVR relationship holds up for a heart diseased sample, and (2) whether this relationship is evidenced only in supportive environments or can be found as a function of generalized perception of being socially supported. Thus, the purpose of this study was to examine the relationship of perceived SS and a locally supportive presence to CVR to a speech-induced stressor in post coronary event patients. METHOD: Forty-one Phase II cardiac rehabilitation patients participated in a research protocol that consisted of BP and HR measurement during two identical affective stress interviews where local support was systematically varied by presence or absence of a friendly small pet dog. Perception of SS was assessed by completion of psychosocial questionnaire packet that included measures of SS, anger expression and pet attachment. RESULTS: Repeated measures ANCOVAs revealed that patients who believed they had greater SS available to them during difficult times exhibited significantly less CVR for MAP (p<.007) and DBP (p<.024). No significant main effects for local support (pet presence) and no interactions between local and perceived support were found. CONCLUSIONS: These findings are of interest as they: (a) demonstrate an association between reduced CVR and higher (amounts of) SS in a clinical sample; (b) demonstrate this effect in a sample medicated to dampen CV levels and surges; (c) suggest that perceived amount of SS provides an ameliorative influence on CVR independent of situational support; (d) suggest that for certain conditions pet-models of support may be ineffective at establishing an local support presence.     

Locus of control predicts appraisals and cardiovascular reactivity to a novel active coping task

These two studies investigated the influence of dispositional locus of control (LOC) on subjective and physiological responses to a novel laboratory stressor task. Across two studies, 64 healthy undergraduate students, ages 18-22, completed Levenson's (LOC) scales for internal, powerful others, and chance prior to performing a video-game task. Participants rated pretask and posttask stressfulness and coping ability (i.e., measures of primary and secondary appraisal). Cardiovascular measures (heart period, HP; preejection period, PEP; respiratory sinus arrhythmia, RSA; cardiac output, CO; systolic blood pressure, SBP; diastolic blood pressure, DBP & total peripheral resistance, TPR) were recorded during 4-minute baseline and 4-minute stressor task periods. The internal LOC factor predicted pretask reports of coping ability as well as posttask reports of stressfulness. In contrast, the powerful-others LOC factor predicted cardiac changes (HP, PEP, and RSA) during the task but not cardiac output or any other vascular change measure. These results underscore the importance of using the three subscales of the Levenson LOC to assess relationships between dispositional LOC and the response to stressors because self-reported appraisals of a task are predicted by a different component of dispositional LOC than are task-related cardiovascular functions.     

Narcissism and Cardiovascular Reactivity to Rejection Imagery1

This study examined the interactive effects of imagined rejection and narcissism on cardiovascular reactivity (CVR). Participants completed measures of overt narcissism (Narcissistic Personality Inventory, NPI; Raskin & Hall, 1979 ), overt–covert narcissism ( Margolis & Thomas, 1980 ), and trait self‐esteem. They then imagined 2 scenarios culminating in either interpersonal acceptance or rejection. Systolic (SBP) and diastolic blood pressure (DBP) and heart rate (HR) were assessed before, during, and after the imagery. Overt–covert narcissism was positively associated with task increases in SBP and DBP and recovery elevation of HR following rejection, but not acceptance. Similar effects on SBP were found for the Entitlement/Exploitativeness dimension of the NPI. Lower self‐esteem predicted greater task increases in SBP, DBP, and HR across conditions. Implications for health are discussed.     

Discrimination and unfair treatment: relationship to cardiovascular reactivity among African American and European American women.

This study examined the relationship of cardiovascular reactivity to both interpersonal mistreatment and discrimination in a community-based sample of African American and European American women (N=363) in midlife. Subtle mistreatment related positively to diastolic blood pressure (DBP) reactivity for African American participants but not their European American counterparts. Moreover, among the African American participants, those who attributed mistreatment to racial discrimination exhibited greater average DBP reactivity. In particular, these women demonstrated greater DBP reactivity to the speech task, which bore similarities to an encounter with racial prejudice but not to a nonsocial mirror tracing task. These findings are consistent with the hypothesis that racial discrimination is a chronic stressor that can negatively impact the cardiovascular health of African Americans through pathogenic processes associated with physiologic reactivity.     

Cardiovascular reactions to psychological stress and abuse history: the role of occurrence,frequency, and type of abuse

Background and objectives: Extreme cardiovascular reactions to psychological stress have been associated with traumatic life experiences. Previous studies have focused on the occurrence or frequency of abuse rather than type of abuse. We examined how occurrence, frequency, and the type of abuse history are related to cardiovascular reactivity (CVR) to acute psychological stress. Design: The study consisted of between group and continuous analyses to examine the association between occurrence, type, and frequency of abuse with cardiovascular reactions to acute psychological stress. Methods: Data from 64 participants were collected. Heart rate, systolic blood pressure, and diastolic blood pressure were measured at baseline and during a standard mental arithmetic stress task. Results: Individuals who experienced abuse showed diminished CVR to acute psychological stress; this was driven specifically by the history of sexual abuse. Frequency of abuse did not relate to stress reactions. Conclusions: These findings accord with previous work suggesting a relationship between traumatic life experience and hypoarousal in physiological reactivity and extend previous findings by suggesting the relationship may be driven by sexual abuse.     

The perception of available social support is related to reduced cardiovascular reactivity in phase II cardiac rehabilitation patients

Objective  Numerous studies have observed a relationship between social support (SS) and post coronary event survival. Laboratory research suggests one mechanism regulating this relationship may be exaggerated cardiovascular reactivity (CVR). What has not been as well explored is (1) whether the SS-CVR relationship holds up for a heart diseased sample, and (2) whether this relationship is evidenced only in supportive environments or can be found as a function of generalized perception of being socially supported. Thus, the purpose of this study was to examine the relationship of perceived SS and a locally supportive presence to CVR to a speech-induced stressor in post coronary event patients. Method  Forty-one Phase II cardiac rehabilitation patients participated in a research protocol that consisted of BP and HR measurement during two identical affective stress interviews where local support was systematically varied by presence or absence of a friendly small pet dog. Perception of SS was assessed by completion of psychosocial questionnaire packet that included measures of SS, anger expression and pet attachment. Results  Repeated measures ANCOVAs revealed that patients who believed they had greater SS available to them during difficult times exhibited significantly less CVR for MAP (p<.007) and DBP (p<.024). No significant main effects for local support (pet presence) and no interactions between local and perceived support were found. Conclusions  These findings are of interest as they: (a) demonstrate an association between reduced CVR and higher (amounts of) SS in a clinical sample; (b) demonstrate this effect in a sample medicated to dampen CV levels and surges; (c) suggest that perceived amount of SS provides an ameliorative influence on CVR independent of situational support; (d) suggest that for certain conditions pet-models of support may be ineffective at establishing an local support presence.     

Individual differences in cardiovascular reactions to stress and cigarette smoking

The present study examined the stability of cardiovascular reactions to psychological stress and cigarette smoking, and the extent to which cardiovascular reactions to stress were predictive of cardiovascular reactions to smoking. Thirty subjects were given an initial test involving two repetitions of mental arithmetic stress and paced smoking while blood pressure and heart rate were measured. Two months later, 26 of these subjects were retested in the same paradigm. Large and stable individual differences were observed in cardiovascular reactivity to both stress and smoking. Moreover, for systolic and diastolic blood pressure, but not heart rate, reactions to stress were modestly correlated with reactions to cigarette smoking. These results are consistent with the possibility that level of reactivity to cigarette smoking may constitute a risk factor for coronary heart disease, and that one or more common variables may mediate the magnitude of blood pressure reactivity to both stress and cigarette smoking.     

Reversing the Gender Gap in Negotiations: An Exploration of Stereotype Regeneration

We examine how gender stereotypes affect performance in mixed-gender negotiations. We extend recent work demonstrating that stereotype activation leads to a male advantage and a complementary female disadvantage at the bargaining table (Kray, Thompson, & Galinsky, 2001). In the present investigation, we regenerate the stereotype of effective negotiators by associating stereotypically feminine skills with negotiation success. In Experiment 1, women performed better in mixed-gender negotiations when stereotypically feminine traits were linked to successful negotiating, but not when gender-neutral traits were linked to negotiation success. Gender differences were mediated by the performance expectations and goals set by negotiators. In Experiment 2, we regenerated the stereotype of effective negotiators by linking stereotypically masculine or feminine traits with negotiation ineffectiveness. Women outperformed men in mixed-gender negotiations when stereotypically masculine traits were linked to poor negotiation performance, but men outperformed women when stereotypically feminine traits were linked to poor negotiation performance. Implications for stereotype threat theory and negotiations are discussed.     

The Effect of Target Age on the Activation of Gender Stereotypes

Two studies investigated the impact of target age on gender stereotyping. Study 1 examined whether the attribution of gender-stereotypical traits to unfamiliar individuals varies as a function of target and participant age. Adults and children (ages 8–10 years) viewed photographs of men, women, boys, and girls and rated each pictured individual on the possession of masculine, feminine, and gender-neutral personality traits. Both adult and child participants showed evidence of gender stereotyping. The strongest level of stereotyping was seen when adults rated child targets. Adults were particularly unwilling to attribute feminine characteristics to males. Finally, participants of both ages viewed adult targets (regardless of sex) as more masculine and less feminine than child targets. Study 2 examined the generality of the latter finding. Adult participants rated traditionally masculine and feminine traits on the likelihood of possession by adults versus children. Confirming the results of Study 1, feminine traits were believed to be more childlike/less adultlike than were masculine traits. Implications for gender-role development, socialization, and measurement are discussed.