Optimism and Physical Health: A Meta-analytic Review

Background—Prior research links optimism to physical health, but the strength of the association has not been systematically evaluated. Purpose—The purpose of this study is to conduct a meta-analytic review to determine the strength of the association between optimism and physical health. Methods—The findings from 83 studies, with 108 effect sizes (ESs), were included in the analyses, using random-effects models. Results—Overall, the mean ES characterizing the relationship between optimism and physical health outcomes was 0.17, p<.001. ESs were larger for studies using subjective (versus objective) measures of physical health. Subsidiary analyses were also conducted grouping studies into those that focused solely on mortality, survival, cardiovascular outcomes, physiological markers (including immune function), immune function only, cancer outcomes, outcomes related to pregnancy, physical symptoms, or pain. In each case, optimism was a significant predictor of health outcomes or markers, all p<.001. Conclusions—Optimism is a significant predictor of positive physical health outcomes

Do the Emotional Benefits of Optimism Vary Across Older Adulthood? A Life-Span Perspective

Objective. This study examined whether the emotional benefits of dispositional optimism for managing stressful encounters decrease across older adulthood. Such an effect might emerge because age-related declines in opportunities for overcoming stressors could reduce the effectiveness of optimism. Method. This hypothesis was tested in a six-year longitudinal study of 171 community-dwelling older adults (age range = 64 to 90 years). Results. Hierarchical linear models showed that dispositional optimism protected relatively young participants from exhibiting elevations in depressive symptoms over time, but that these benefits became increasingly reduced among their older counterparts. Moreover, the findings showed that an age-related association between optimism and depressive symptoms was observed particularly during periods of enhanced, as compared to reduced, stress. Conclusions. These results suggest that dispositional optimism protects emotional well-being during the early phases of older adulthood, but that its effects are reduced in advanced old age

Optimism

Dispositional optimism is a personality construct that reflects individual differences in generalized expectations about future outcomes. Unlike their pessimistic counterparts, optimists tend to approach the world expecting positive, as opposed to negative, outcomes to occur in their future, across different life domains. This definition makes dispositional optimism different from other, related concepts that address outcome expectancies of specific, situational transactions and behaviors or infer optimism through an individual’s interpretation of negative life events. Most research examines dispositional optimism by administering the “Life Orientation Test-Revised”, which assesses a person’s generalized optimistic and pessimistic outcome expectancies. Much of this work has treated dispositional optimism as a continuous, bipolar construct, ranging from high levels of pessimism to high levels of optimism. Other research, however, has examined optimistic and pessimistic outcome expectancies as separate, but related, constructs. Overall, the literature on dispositional optimism suggests that optimists live happier and healthier lives than pessimists. This entry reviews literature on optimism and provides an overview of the psychological mechanisms that make dispositional optimism an adaptive personal resource. The entry focuses on two important life-span developmental questions: 1) are there age-related changes in the benefits of optimism, and 2) can individuals become more optimistic over time

The Whole is Not the Sum of Its Parts: Specific Types of Positive Affect Influence Sleep Differentially

Given the known detrimental effects of poor sleep on an array of psychological and physical health processes, it is critical to understand the factors that protect sleep, especially during times of stress when sleep particularly suffers. Positive affect (PA) arises as a variable of interest given its known associations with health and health behaviors and its ability to buffer stress. In two studies, we examined which types of PA (distinguished by arousal level and trait/state measurement) were most beneficial for sleep and whether these associations varied depending on the stress context. In Study 1, college students (N = 99) reported on their PA and sleep during the week of a major exam. In Study 2, two weeks of daily PA and sleep data were collected during a period with no examinations in a similar sample of students (N = 83). Results indicated that high trait vigor was tied to better sleep efficiency and quality, especially during high stress. Trait calm was generally unhelpful to sleep, and was related negatively to sleep duration. State calm, on the other hand, interacted with stress in Study 2 to predict more efficient day-to-day sleep on days with higher average stress. These findings illustrate the importance of considering arousal level, affect duration, and stress context in studies of PA and health

Cross-protective HCoV immunity reduces symptom development during SARS-CoV-2 infection

Knowledge of the interplay between human coronavirus (HCoV) immunity and severe acute respiratory syndrome coronavirus type 2 (SARS-CoV-2) infection is critical to understanding the coexistence of current endemic coronaviruses and to building knowledge potential future zoonotic coronavirus transmissions. This study, which retrospectively analyzed a large cohort of individuals first exposed to SARS-CoV-2 in Switzerland in 2020–2021, revealed several key findings. Pre-existing HCoV immunity, particularly mucosal antibody responses, played a significant role in improving SARS-CoV-2 immune response upon infection and reducing symptoms development. Mucosal neutralizing activity against SARS-CoV-2, although low in magnitude, retained activity against SARS-CoV-2 variants underlining the importance of maintaining local mucosal immunity to SARS-CoV-2. While the cross-protective effect of HCoV immunity was not sufficient to block infection by SARS-CoV-2, the present study revealed a remarkable impact on limiting symptomatic disease. These findings support the feasibility of generating pan-protective coronavirus vaccines by inducing potent mucosal immune responses

Control theory: A useful conceptual framework for personality-social, clinical, and health psychology

Contends that control theory provides a model of self-regulation that is useful in the analysis of human behavior. As an illustration of the breadth of its applicability, the basic construct of control theory--the discrepancy-reducing feedback loop--is presented, and certain implications for theory in 3 areas of human psychology are discussed. In personality-social, clinical, and health psychology, the construct proves to fit well with known phenomena and with the theories most recently developed to account for the phenomena. Moreover, in each case control theory appears to make a unique contribution to the state of the area. The integrative potential suggested by these illustrations and some issues that should receive attention in future work are noted. (3 p ref

Self-consciousness and reactance

Two studies examined the effects of dispositional self-consciousness on reactance. In Experiment 1, men who were high in private self-consciousness displayed greater reactance responses to a coercive communication attempt (as reflected by attitude reversal) than did men lower in private self-consciousness. In contrast, the effect of public self-consciousness in this context was to inhibit the expression of reactance. In Experiment 2, women high in private self-consciousness exhibited greater reactance responses to a self-imposed threat to their freedom of choice (as reflected by equivocation over two choice alternatives) than did women lower in private self-consciousness. The effect of public self-consciousness in this context was negligible. These findings replicate and extend a previous self-awareness and reactance finding; they provide additional evidence that manipulated self-awareness and dispositional self-consciousness converge on the same psychological entity; and they provide additional evidence that there are important differences between the dimensions of private and public self-consciousness