We analyzed the effects of evaluative observation and baseline duration on cardiovascular reactivity and adaptation to recurrent psychological stress. Cardiovascular reactivity to mental arithmetic stress was assessed in college men and women (N=224) during two pretest tasks, a test task, and a posttest task. Participants were assigned randomly in a 2 x 2 design to manipulations of baseline duration before the test task (4 min vs. 12 min) and evaluative observation during the test task (observed vs. control). Repeated exposure to stress attenuated cardiac but not vascular reactivity. Evaluative observation disrupted cardiac adaptation, resulting in a resurgence of beta-adrenergic cardiac reactivity during the test task. Cardiac adaptation resumed fully during the posttest task. Baseline duration had no effect on reactivity. The results replicate and extend previous work, and support the dual process theory of habituation and sensitization.

Important differences between Blacks of different ethnicities in the U.S. in chronic disease morbidity and mortality have been reported. Blacks in the U.S. constitute a heterogeneous group, including immigrants from Africa, Caribbean nations, Central and South America, as well as people now known as African Americans. Ethnicity among Blacks is seldom examined in health research, although in-depth examination of the ethnicity and culture-related pathways through which psychosocial factors may act to influence health have the potential to improve our understanding of health disparities. This improved understanding could in turn lead to the development of new, innovative, culturally based interventions that may reduce health disparities in the U.S. We briefly review the literature that examines Black ethnicity and birthplace, health outcomes, health-related knowledge and behaviors, and health-related psychological and social factors. We present a conceptual framework to aid in understanding the links between these factors and health. Suggestions are offered for conducting research in the future.

This study used data from a completed longitudinal study to examine the effects of methylphenidate on 6-12-year-old boys presumably at risk for bipolar disorder. Of 75 boys referred, diagnosed with hyperkinetic reaction of childhood (minimal brain dysfunction), treated clinically with methylphenidate, and followed as young adults, 23% (the maximorbid or MAX group) had childhood symptoms of irritability and emulated DSM-IV diagnoses of attention deficit hyperactivity disorder (ADHD), plus oppositional defiant or conduct disorder (ODD/CD) and anxiety or depression or both. The remaining boys (the minimorbid or MIN group) had fewer symptoms and disorders. MAX and MIN groups did not differ in rated response to methylphenidate, duration of treatment, clinically determined maintenance doses, concurrent or subsequent treatment with other medications, or other aspects of medication experience. At ages 21-23, individuals with bipolar-related lifetime diagnoses (adult mania, hypomania, or cyclothymia) did not differ from those without bipolar-related diagnoses in any aspect of early methylphenidate treatment history. These findings indicate that ADHD boys with symptoms suggesting childhood mania do not respond differently to methylphenidate than boys without such symptoms, and there is no evidence here that methylphenidate precipitates young adult bipolar disorders in susceptible individuals.

Stigma may be an important factor in mental health service seeking and utilization. However, little work on stigma has been conducted in developing nations in the Caribbean, including Jamaica. We explored mental illness stigma in Jamaica by conducting focus groups with 16 community samples. Four overarching conceptual themes are discussed: (1) community members' definitions of stigma; (2) emotional responses towards those with mental illness, such as fear and love; (3) behavioral responses towards those with mental illness, including avoidance and cautious approach; and (4) perceptions of and beliefs about mental illness, including a distinction between "madness" and "mental illness."