Patterns of cardiovascular responses to stress as a function of race and parental hypertension in men

This study investigated cardiovascular responses to two stressors known to elicit either beta-adrenergic (mental arithmetic) or alpha-adrenergic (forehead cold pressor) reactivity in Black and White men. Participants in each group were selected for presence or absence of parental hypertension. Based on previous research, Blacks were expected to show smaller cardiovascular responses to the beta-adrenergic mental arithmetic task and greater responses to the alpha-adrenergic cold pressor relative to the Whites. Systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate, forearm blood flow, and forearm vascular resistance were assessed during a resting baseline, a prestress period, and during and after each experimental procedure. Unlike previous findings, no significant racial differences in cardiovascular responses were found during either task. However, Black participants had significantly higher SBP and DBP levels throughout the cold pressor periods. Parental history did not significantly influence cardiovascular responses in either group. The results are discussed in relation to previous research on racial differences in stress reactivity and their implications for future research.     

Race differences in stress-induced reactivity in young adults

The cardiovascular response to the stress of mental arithmetic was studied in young Black and White adults. Stress-induced reactivity was studied before and following 14 days of oral sodium loading (10 gm NaCl per day). Marginal hypertensives, both Black and White, had greater systolic blood pressure (SBP) levels (p less than 0.001) and greater diastolic blood pressure (DBP) levels (p less than 0.01) in response to stress. Whites had a greater SBP level during mental stress than Blacks (p = 0.008) and greater reactivity (change from baseline; p less than 0.001). The prevalence of sodium sensitivity was greater in Blacks (37.3%) than in Whites (18.4%). Sodium loading did not augment the BP reactivity to the mental stress in any of the racial or BP groups. These data demonstrate racial variation in the cardiovascular response to centrally mediated adrenergic stimuli. The results also suggest that mild BP elevation in Blacks may be regulated through changes in vascular resistance.     

Cardiovascular and neurohumoral responses to behavioral challenge as a function of race and sex

Cardiovascular and hormonal responses to a structured interview, an electronic video game, a cold pressor test, and exercise on a bicycle ergometer were assessed in eighty-three 25- to 44-year-old normotensive Black and White men and women. Blacks showed significantly greater diastolic blood pressure (DBP) responses than Whites during the cold pressor test, which were not accounted for by an increase in plasma catecholamines. Exercise produced reliably greater systolic blood pressure (SBP) increases in Black women than in Black men or White women. Men showed significantly greater SBP and DBP changes than women during the video game. These findings suggest that the pattern of physiological reactivity elicited by challenge is related to the race and sex of the subjects.     

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.     

Associations of blood pressure with self-report measures of anger and hostility among black and white men and women

This study examined associations between blood pressure (BP) and dispositional variables pertaining to anger and hostility. Black and White 25- to 44-year old male and female normotensives and unmedicated mild to moderate hypertensives completed four reliable self-report scales--the Cook-Medley Hostility (Ho) Scale, the Trait Anger subscale of the State-Trait Anger Scale (STAS-T), and the Cognitive Anger and Somatic Anger subscales of the Cognitive-Somatic Anger Scale--plus the Framingham Anger Scale and the Harburg Anger Scale. They also engaged in three laboratory tasks--Type A Structured Interview (SI), a video game, and a cold pressor task--that elicit cardiovascular reactivity. Ambulatory BP readings at home and at work were also obtained from most subjects. Blacks had significantly higher Ho and lower STAS-T scores than did Whites. Women reported higher levels of somatic anger than did men. White women showed significant positive correlations between STAS-T and systolic BP (SBP) and diastolic BP (DBP) both at rest in the laboratory and during the SI. Black women revealed significant positive relationships between STAS-T and SBP and DBP at rest in the laboratory and at work as well as with DBP during the cold pressor test. For Black men, cognitive anger and DBP at rest were positively related. In contrast, White men revealed significant negative correlations between Ho scores and SBP at rest and during the video game; these men also showed significant negative relationships between somatic anger and SBP and DBP reactivity during the cold pressor test. Women, but not men, showed significant positive relationships between all four anger measures and ambulatory BP at work. Whereas main effects relating anger and cardiovascular measures were not apparent as a function of race, Blacks demonstrated significantly greater SBP and DBP reactivity than Whites during the cold pressor test, with the converse occurring during the SI. Men demonstrated significantly greater DBP reactivity than women during the video game. The present findings indicate that self-reports on anger/hostility measures and cardiovascular responses to behavioral tasks differ as a function of race but that relationships between anger and BP regulation need to take into account possible race-sex interactions and selection of anger/hostility measures.     

Discrimination, dispositions, and cardiovascular responses to stress.

OBJECTIVE: Recent research suggests that past exposure to discrimination may influence perceptions of, and physiological responses to, new challenges. The authors examined how race and trait levels of hostility and optimism interact with past exposure to discrimination to predict physiological reactivity and recovery during an anger recall task. DESIGN: A community sample of 165 normotensive Black and White adults participated in an anger recall task while having their cardiovascular function monitored. MAIN OUTCOME MEASURES: Blood pressure and heart rate indicators of physiological reactivity and recovery. RESULTS AND CONCLUSION: Participants had higher reactivity and slower recovery to the anger recall task when they had high past discrimination, low cynicism, or high optimism. The pattern of effects was similar for both racial groups, but Blacks had more acute reactivity and slower recovery than Whites. These results are consistent with the perspective of discrimination as a chronic stressor that is related to acute stress responses, particularly for Blacks.     

Trait ratings of the in-group and out-group with minimal acquaintance: Differentiation and out-group favorability

Malloy et al. (2011) studied trait judgments and behavior of Black and White men during face-to-face interactions at zero-acquaintance and found that intergroup responses were asymmetric. The present research extends that work. In Study 1 Black and White men observed two dyadic interactions from the Malloy et al (2011) study and rated in-group targets’ traits. In Study 2, using the type generation paradigm, Black and White males and females generated types of persons from their racial in-group or out-group and rated their traits. Blacks differentiated the unique traits of Whites to a greater extent than Whites differentiated the unique traits of Blacks. Blacks and Whites judged out-group targets’ traits more positively than those of in-group members, and both differentiated the unique traits of in-group members more than out-group members.     

Developing cognitions about race: White 5‐ to 10‐year‐olds' perceptions of hardship and pain

White American adults assume that Blacks feel less pain than do Whites, but only if they believe that Blacks have faced greater economic hardship than Whites. The current study investigates when in development children first recognize racial group differences in economic hardship and examines whether perceptions of hardship inform children's racial bias in pain perception. Five‐ to 10‐year‐olds (N = 178) guessed which of two items (low versus high value) belonged to a Black and a White child and rated the amount of pain a Black and a White child would feel in 10 painful situations. By age 5, White American children attributed lower‐value possessions to Blacks than Whites, indicating a recognition of racial group differences in economic hardship. The results also replicated the emergence of a racial bias in pain perception between 5 and 10. However, unlike adults', children's perceptions of hardship do not account for racial bias in pain perception.     

Impact of caffeine and psychological stress on blood pressure in black and white men

The purpose of this study was to examine the effects of caffeine and psychological stress on systolic blood pressure (SBP) and heart rate (HR) in 40 healthy Black and White male regular coffee drinkers. Half the subjects had a positive family history of hypertension (FH+), and half did not. The effects of 250 mg of caffeine versus placebo (3 mg) in decaffeinated coffee were compared in a within-subject, double-blind, cross-over design. SBP and HR were measured at rest, after caffeine ingestion, during mental arithmetic stress, and during recovery. Results confirmed previous findings with White men that a moderate dose of caffeine produced significant increases in SBP and little effect on HR and that the pressor effects of caffeine and stress combined additively. Contrary to expectations, no overall race or family history differences in SBP levels or in SBP reactivity were observed. FH+ Blacks, however, evidenced slower SBP recovery than Whites. Whites evidenced higher overall HR levels than blacks, but this difference was not specific to caffeine or to mental stress. Mechanisms of racial differences in reactivity underlying differential risk for hypertension are discussed, as well as the utility of caffeine as a pharmacologic probe for such differences.     

Teammates On and Off the Field? Contact With Black Teammates and the Racial Attitudes of White Student Athletes1

The intergroup contact hypothesis holds that proximate, cooperative interactions on an equalized basis between Blacks and Whites can minimize Whites’ prejudice (Allport, 1954). This experiment investigated the effect of contact between White and Black high school teammates on White student athletes’ racial attitudes. Using the 1996 Social and Group Experiences (SAGE) survey (created by the authors and administered in the Fall of 1996) commissioned by the National Collegiate Athletic Association, the results indicated a significant relationship between amount of contact with Black teammates in high school and racial policy support and affect, depending on the type of sport played. White student athletes playing team sports who had higher percentages of Blacks as high school teammates expressed more policy support for and greater positive affect toward Blacks as a group than did their counterparts playing individual sports. The role of athletic experiences in changing racial attitudes is discussed.     

Target prototypicality moderates racial bias in the decision to shoot

Research shows that target race can influence the decision to shoot armed and unarmed Black and White males (e.g., Correll, Park, Judd, & Wittenbrink, 2002). To date, however, research has only examined category level effects by comparing average responses to Blacks and Whites. The current studies investigated whether target prototypicality influences the decision to shoot above and beyond the effect of race. Here, we replicated racial bias in shoot decisions and demonstrated that bias was moderated by target prototypicality. As target prototypicality increased, participants showed greater racial bias. Further, when targets were unprototypic, racial bias reversed (e.g., participants mistakenly shot more unarmed Whites than Blacks). Study 2 examined whether these effects were observed among police officers. Although police showed no racial bias on average, target prototypicality significantly influenced judgments. Across both studies, sensitivity to variability in Whites' prototypicality drove these effects, while variation in Black prototypicality did not affect participants' decisions.     

The role of ethnicity,gender, emotional content,and contextual differences in physiological,expressive, and self-reported emotional responses to imagery

Cardiovascular responses, skin conductance, corrugator ("frown"), and zygomaticus ("smile") electromyographic activity, and self-reported emotional responses were examined in response to scenarios that varied in emotional content and whether they involved interacting with a Black or White person. Black (33 women, 25 men) and White (28 women, 26 men) students imagined joy, neutral, fear, and anger situations. Emotional contents replicated patterns of physiological and self-reported emotion found in other studies, although gender differences in emotion found in other studies were evident only in White participants. Blacks exhibited more positive facial expressions, while Whites were more negatively expressive. Blacks, and particularly Black men, exhibited greater blood pressure reactivity to the emotional contexts. For both White and Black participants, imagined interactions with Blacks increased both positive and negative facial expression. Results suggest that, compared to Whites, Blacks are both more autonomically reactive to emotional interactions and may be responded to more emotionally. The results are discussed in terms of the need to study specific contextual factors rather than broad cross-cultural characterisations.     

Assessing White Racial Consciousness and Perceived Comfort with Black Individuals: A Preliminary Study

This research examined the relationship between White racial consciousness development and perceived comfort with Black individuals. Participants were 339 White undergraduate students from a large southeastern state university who were asked to complete a two-part inventory: part one measuring White racial consciousness development (a five-stage scale) and part two measuring perceived comfort in situations involving Black individuals. An eta coefficient was calculated, providing evidence for the existence of a strong curvilinear relationship between White racial consciousness and perceived comfort with Black individuals η =.23 at p<.0001. These findings suggest that Whites who are completely foreclosed (stage one) or who are well acquainted with Blacks (stage five) are more comfortable in situations with Blacks than Whites who had a moderate amount of contact with them (stages two, three, and four).     

Dangerous Enough: Moderating Racial Bias with Contextual Threat Cues

Research shows that participants shoot armed Blacks more frequently and quickly than armed Whites, but make don't-shoot responses more frequently and quickly for unarmed Whites than unarmed Blacks. We argue that this bias reflects the perception of threat — specifically, threat associated with Black males. Other danger cues (not just race) may create a similar predisposition to shoot, and if these cues promote shooting when the target is White, they should attenuate racial bias. We embedded targets in threatening and safe backgrounds. Racial bias was evident in safe contexts but disappeared when context signaled danger, and this reduction was largely due to an increased tendency to shoot White targets.     

BLACK AND WHITE COLLEGE WOMEN'S PERCEPTIONS OF EARLY MATERNAL EMPLOYMENT

Black ( n = 89) and White ( n = 121) female students rated their perceptions of the mother of a one-year-old infant as a function of the mother's race (Black/White) and employment role (employment/nonemployment after the birth of her child). Results showed that White, compared to Black, students anticipated comparatively more role-related costs for the employed than the nonemployed mothers. Furthermore, Blacks, but not Whites, expected more role-related emotional rewards for the employed than the nonemployed mothers. The data are linked to previous findings concerning Whites' and Blacks' attitudes toward role integration.     

Race and self-esteem: meta-analyses comparing whites,blacks, Hispanics,Asians, and American Indians and comment on Gray-Little and Hafdahl (2000)

These meta-analyses examine race differences in self-esteem among 712 datapoints. Blacks scored higher than Whites on self-esteem measures (d = 0.19), but Whites scored higher than other racial minority groups, including Hispanics (d = -0.09), Asians (d = -0.30), and American Indians (d = -0.21). Most of these differences were smallest in childhood and grew larger with age. Blacks' self-esteem increased over time relative to Whites', with the Black advantage not appearing until the 1980s. Black and Hispanic samples scored higher on measures without an academic self-esteem subscale. Relative to Whites, minority males had lower self-esteem than did minority females, and Black and Hispanic self-esteem was higher in groups with high socioeconomic status. The results are most consistent with a cultural interpretation of racial differences in self-esteem.     

News Selection Patterns as a Function of Race: The Discerning Minority and the Indiscriminating Majority

This study examines whether White majority and Black minority members differ in selecting news stories that featured either individuals of their own group or dissimilar others. Hypotheses derived from social-cognitive theory, social comparison theory, and distinctiveness theories were tested utilizing unobtrusive observations of news story selections. This selective exposure research design overcomes methodological constraints of previous experimental studies that employed self-reports and forced-exposure techniques to measure responses of Blacks and Whites to race-specific media sources. Our sample consisted of 112 Blacks and 93 Whites, who browsed 10 online news stories while exposure was unobtrusively logged via software. The news site displayed equal numbers of Black and White characters, with the pictures associated with the news stories rotated across participants. Results indicate that Whites showed no preference based on the race of the character featured in the news story. In contrast, Blacks strongly preferred news stories featuring Blacks and spent more than twice the reading time on them compared to exposure to news stories featuring Whites.     

Ironic effects of racial bias during interracial interactions

Previous research has suggested that Blacks like White interaction partners who make an effort to appear unbiased more than those who do not. We tested the hypothesis that, ironically, Blacks perceive White interaction partners who are more racially biased more positively than less biased White partners, primarily because the former group must make more of an effort to control racial bias than the latter. White participants in this study completed the Implicit Association Test (IAT) as a measure of racial bias and then discussed race relations with either a White or a Black partner. Whites' IAT scores predicted how positively they were perceived by Black (but not White) interaction partners, and this relationship was mediated by Blacks' perceptions of how engaged the White participants were during the interaction. We discuss implications of the finding that Blacks may, ironically, prefer to interact with highly racially biased Whites, at least in short interactions.     

Evaluations of presidential performance: Race, prejudice, and perceptions of Americanism

Earlier research suggests that despite President Obama's election, racial prejudice persists and continues to shape reactions to his presidency. The current work examines the role of Whites’ prejudice in shaping perceptions of Obama's Americanism, and ultimately evaluations of his performance. Specifically, this research proposes that “how American” Obama is perceived will mediate the relationship between racial prejudice and evaluations of his performance for White, but not Black participants and only for Obama and not for Vice-President Biden. Data were collected from 295 Black or White students surveyed 1 year after Obama's election. Supportive of our hypotheses, racial prejudice predicted Whites’ negative evaluations of Obama's performance, and this relationship was mediated by how American Obama was perceived. Additionally, these relationships were not obtained among Black participants or when Blacks or Whites evaluated the Americanism and job performance of Vice-President Biden.     

Own-Ethnicity Bias in the Recognition of Black,East Asian,Hispanic, and White Faces

Black, East Asian, Hispanic, and White young adult Americans were asked to view and later recognize ethnic faces (Black, East Asian, Hispanic, and White) of children and young adults in a study of own-ethnicity and own-age bias. Own-ethnicity and own-age biases were found. Hispanics recognized Hispanic and White faces better than Asian and Black faces, Blacks recognized Black and White faces better than Asian and Hispanic faces, Asians recognized Asian faces better than Black faces and marginally better than White and Hispanic faces, and Whites recognized White faces better than those of other ethnicities. Results are discussed with respect to contact and facial encoding hypotheses.