The influence of introversion-extraversion on activity choice and satisfaction among the elderly

The present study investigated the optimum theory of aging. This theory predicts that individuals with different personality types will react differentially to the aging process. In the present study, 60 nursing-home residents were administered the Eysenck Personality Inventory and then randomly assigned to one of two experimental manipulations. Elderly subjects classified as extraverts showed a high level of satisfaction to an experimental manipulation which was of a high activity, interpersonal type; those classified as introverts evidenced more satisfaction with a low activity, non-interpersonal type manipulation. Inspection of records documenting actual participation in programs within the nursing home indicated that introverts were more often involved in low activity, non-interpersonal events whereas extraverts participated more often in high activity, interpersonal events. Implications of these results are discussed in relation to the optimum theory of aging.     

Five-Factor Model facets differentially predict in-the-moment affect and cognitions

The facets of the Five-Factor Model (FFM) of personality are presumed to represent distinct, biologically-based tendencies to act, think, and behave; yet they have received little behaviorally-based empirical validation. In this study, FFM facets were used to examine individual differences in affective and cognitive responses to stressors as they are experienced in daily life. Participants (N = 79) completed the NEO-PI-R followed by a week-long experience sampling procedure. As expected, hierarchical linear modeling showed that FFM facets captured affective and cognitive tendencies that were missed at the domain level. They additionally demonstrated convergent and divergent validity in predicting momentary affect. These results provide evidence that facets are distinct, non-interchangeable predictors of daily thoughts and emotions.     

Body-Region-Specific Injuries as Predictors of Psychosocial Outcomes Among Those Injured in Combat: Results From the Wounded Warrior Recovery Project

Associations between body region injured and psychosocial outcomes may have implications for injury prevention and mitigation strategies. The present study investigated the association of body-region—specific injuries and their association with 3 psychosocial outcomes (i.e., quality of life, QOL; posttraumatic stress disorder, PTSD; and depression) among a large sample of U.S. military service members injured in combat. A total of 1,011 individuals wounded in combat enrolled in the Wounded Warrior Recovery Project and provided QOL, depression, and PTSD measures on a Web-based survey. These psychosocial variables were linked with the presence/absence of combat injuries in 9 different body regions (head, face, neck, thorax, spine, abdomen, upper extremity, lower extremity, and external skin/other), as well as overall injury severity and demographic factors. Two-step hierarchical linear regressions revealed that after adjusting for overall injury severity and time since injury, those with combat-related head and spine injuries were particularly at risk for relatively worse psychosocial outcomes. Head and spinal injuries were associated with lower QOL and higher PTSD and depression. Overall, even those with relatively minor injuries may be at risk of lower QOL and adverse psychosocial outcomes. These findings may highlight the need for early interventions to minimize the psychological effects of combat injuries to the head and spine.     

Communicating BRCA1/2 genetic test results within the family: a qualitative analysis

Genetic testing for BRCA1/2 mutations associated with hereditary breast and ovarian cancer reveals significant risk information about one's chances of developing cancer. It is important to study communication processes in families where members are undergoing genetic testing because the information received is crucial not just to the individual concerned but also to other members of the biological family. This study investigates family communication of BRCA1/2 test results from both the informants' and recipients' perspectives. A total of 10 female patients and 22 of their relatives were interviewed. Patients' and their relatives described feelings of responsibility for sharing genetic information within the family to enable others to reduce their risks of developing cancer. However, there were limits to an individuals' responsibility once key family members had been informed, who then had to take responsibility for continuing dissemination of information. Whilst there was an implicit responsibility to inform the family of a mutation, information was edited or withheld in the best interest of relatives, dependent upon their perceived emotional readiness, resilience and current life stage and circumstances. The pre-existing family culture and the impact previous cancer diagnoses had upon the family also influenced the process of communication. Findings are discussed in relation to extant literature and implications for clinical practice are considered.     

The use of schematic knowledge about sources in source monitoring

Source monitoring refers to mental processes leading to attributions regarding the origin of information. We tested Johnson, Hashtroudi, and Lindsay's (1993) assumption that prior source-relevant knowledge is used in some source-monitoring tasks. In two experiments using different domains of schematic knowledge, two sources presented information that was expected for one source and somewhat unexpected for the other. In a later source-monitoring test, participants decided whether items had been presented by Source A, by Source B, or were new. The results of both experiments show that source identification is better for expected items than for somewhat unexpected items. Multinomial modeling analyses revealed that when participants do not remember the source of information, they guess that it was presented by the expected source. These results provide evidence for the claim that source monitoring can be based on prior knowledge and support a guessing hypothesis.     

Chronically increased Gsalpha signaling disrupts associative and spatial learning

The cAMP/PKA pathway plays a critical role in learning and memory systems in animals ranging from mice to Drosophila to Aplysia. Studies of olfactory learning in Drosophila suggest that altered expression of either positive or negative regulators of the cAMP/PKA signaling pathway beyond a certain optimum range may be deleterious. Here we provide genetic evidence of the behavioral and physiological effects of increased signaling through the cAMP/PKA pathway in mice. We have generated transgenic mice in which the expression of a constitutively active form of Gsalpha (Gsalpha* Q227L), the G protein that stimulates adenylyl cyclase activity, is driven in neurons within the forebrain by the promoter from the CaMKIIalpha gene. Despite significantly increased adenylyl cyclase activity, Gsalpha* transgenic mice exhibit PKA-dependent decreases in levels of cAMP due to a compensatory up-regulation in phosphodiesterase activity. Interestingly, Gsalpha* transgenic mice also exhibit enhanced basal synaptic transmission. Consistent with a role for the cAMP/PKA pathway in learning and memory, Gsalpha* transgenic mice show impairments in spatial learning in the Morris water maze and in contextual and cued fear conditioning tasks. The learning deficits observed in these transgenic mice suggest that associative and spatial learning requires regulated Gsalpha protein signaling, much as does olfactory learning in Drosophila.