Firearms Matter: The Moderating Role of Firearm Storage in the Association Between Current Suicidal Ideation and Likelihood of Future Suicide Attempts Among United States Military Personnel

The relationship between firearm ownership and suicide is well documented. This study hypothesized that how soldiers store their firearms would moderate the relationship between suicidal ideation and the self-reported likelihood of engaging in a future suicide attempt, and that this relationship would be explained by fearlessness about death. There were 432 military personnel (91.3% men, 74.2% White, M_age = 27.60) who endorsed current ownership of a private firearm and who were recruited from a military base in the southeastern United States (94.5% National Guard). Firearm storage moderated the relationship between suicidal ideation and the self-reported likelihood of engaging in a future suicide attempt, but this relationship was not explained by fearlessness about death. Individuals who reported keeping their firearms loaded and stored in an unsecure location exhibited higher mean levels of fearlessness about death. Findings highlight the need for research examining contributors to suicide risk in the context of firearm storage, and provide support for suicide prevention efforts involving restricting means.     

Evidence against integration of spatial maps in humans: generality across real and virtual environments

A real-world open-field search task was implemented with humans as an analogue of Blaisdell and Cook’s (Anim Cogn 8:7–16, 2005) pigeon foraging task and Sturz, Bodily, and Katz’s (Anim Cogn 9:207–217, 2006) human virtual foraging task to 1) determine whether humans were capable of integrating independently learned spatial maps and 2) make explicit comparisons of mechanisms used by humans to navigate real and virtual environments. Participants searched for a hidden goal located in one of 16 bins arranged in a 4 × 4 grid. In Phase 1, the goal was hidden between two landmarks (blue T and red L). In Phase 2, the goal was hidden to the left and in front of a single landmark (blue T). Following training, goal-absent trials were conducted in which the red L from Phase 1 was presented alone. Bin choices during goal-absent trials assessed participants’ strategies: association (from Phase 1), generalization (from Phase 2), or integration (combination of Phase 1 and 2). Results were inconsistent with those obtained with pigeons but were consistent with those obtained with humans in a virtual environment. Specifically, during testing, participants did not integrate independently learned spatial maps but used a generalization strategy followed by a shift in search behavior away from the test landmark. These results were confirmed by a control condition in which a novel landmark was presented during testing. Results are consistent with the bulk of recent findings suggesting the use of alternative navigational strategies to cognitive mapping. Results also add to a growing body of literature suggesting that virtual environment approaches to the study of spatial learning and memory have external validity and that spatial mechanisms used by human participants in navigating virtual environments are similar to those used in navigating real-world environments.     

The Big-5 ± 2? The impact of cognitive complexity on the factor structure of the five-factor model

Despite the popularity and prevalence of the five-factor model (FFM) of personality, numerous questions regarding its psychometric properties have yet to be investigated. One issue of particular concern is the underlying premise that these five personality factors are universally shared by all individuals. The present study examined the impact of cognitive complexity on the FFM by directly assessing whether individuals with higher or lower levels of cognitive complexity have personalities comprised of a greater or lesser number of factors, respectively, than the five widely accepted factors outlined by the FFM. Results indicated that individuals with lower levels of cognitive complexity have personalities best described by a three-factor model, whereas individuals with higher levels of cognitive complexity have personalities best described by a seven-factor model. In light of these findings, the appropriateness of universally applying the FFM to individuals of differing levels of cognitive complexity is discussed.     

Ego development in the face of death: How being HIV positive affects movement through Erikson's adult stages of development

Erikson's epigenetic model of psychosocial development posits that each of eight stages unfolds in a particular sequence, and each becomes the primary issue of concern at specified times in the life cycle. Erikson does not address, nor could any empirical studies be located, exploring how the emergence of these eight stages might be affected by a diagnosis of terminal illness. The purpose of this study was to understand how an HIV-positive diagnosis affected movement through Erikson's stages of development. In-depth interviews were conducted with a sample of 18 HIV-positive men and women under 45 years of age. Analysis of the qualitative data revealed three findings regarding Erikson's stages: (1) The fifth stage of idenitity versus role confusion was revisted and the sense of self is redefined; (2) the three adulthood stages of intimacy versus isolation, generativity versus stagnation, and ego integrity versus depair were dealt with simulataneously and, in most cases, resolved favorably; and (3) intimacy and generativity enabled and supported the resolution of the tasks of identity and ego integrity.     

Identifying Differences of Environmental Ethics and Place Attachment Among Visitors and Managers at State Parks

ABSTRACT

Understanding place attachment and environmental ethic variables may improve management of natural areas, including enhanced communication related to management practices, managing various natural resources for specific or designated uses, and mediating significant differences between visitors and managers. Bridging any gaps of knowledge and understanding between visitors and those taking care of these natural places may enhance use and management of those areas into the future. This study elicited place attachment, environmental ethics, and demographic information from visitors to four state parks in Oklahoma. State park managers and state park visitors were found to be significantly different in their levels of place attachment and environmental ethics. Using t tests and discriminant analysis, researchers were able to use proenvironmental ethics and place identity to explain and predict the significant differences between the two groups. Implications for natural resource management include improved resource conservation and sustainability through enhanced education, interpretation efforts, and specific programming to connect people to natural places.     

The development of a smoking-specific locus of control scale

Abstract

A 32-item questionnaire was designed to measure multidimensional locus of control beliefs specifically about giving up smoking (SLC Scale), and administered along with the Multidimensional Health Locus of Control Scale (MHLC) and a short smoking information questionnaire to 211 smokers. Psychometric analyses of the SLC scales included a series of repeated factor and reliability analyses which resulted in a final three-factor solution, containing 11 of the original SLC items. The three factors represented the following types of locus of control for smoking: a combined Internal-Chance factor, a Significant Others factor, and a Powerful Others factor with Chronbach's alpha coefficients of internal reliability of 0.63, 0.56 and 0.55 respectively. Analyses relating to the reliability and validity of the SLC scale are presented and discussed. As expected the SLC correlated more sensibly and significantly with subjects' reported behaviour and intentions regarding giving up smoking than did the MHLC scales.     

The effects of behavioral history on response acquisition with immediate and delayed reinforcement

Effects of prior exposure to the experimental chamber with levers present or absent and variable-time (VT) 60-s water deliveries arranged during one, five, or no 1-hr sessions were examined in rats during a 6-hr response-acquisition session in which presses on one lever produced water delivery immediately or after a 15-s resetting delay, and presses on the other lever canceled scheduled water deliveries. Response acquisition was (a) slower to occur when water deliveries were delayed, (b) most consistent in groups that had received five VT sessions, and (c) impaired by the presence of levers only when there had been five VT sessions and water deliveries were delayed during the acquisition session.     

Prefrontal cortex and the mediation of proactive interference in working memory

Mediating proactive interference (PI), the deleterious effect of antecedent information on current memory representations, is believed to be a key function of prefrontal cortex (PFC). Item-specific PI results when an invalid probe matches a memorandum from the preceding trial; item-nonspecific PI is produced by the accumulation of no-longer-relevant items from previous trials. We tested the hypothesis that these two types of PI are mediated by common PFC-based processes with an fMRI study of a delayed-recognition task designed to produce both types of PI. Our results indicated that the fMRI correlates of both effects were restricted both to Brodmann’s area 45 in the left hemisphere and to the memory probe epoch of the trial. These results suggest that a unification of the literatures and approaches that have independently studied these phenomena might offer a fruitful new perspective from which to study the relations between working memory, executive control, and the PFC.     

The repertoire and intentionality of gestural communication in wild chimpanzees

A growing body of evidence suggests that human language may have emerged primarily in the gestural rather than vocal domain, and that studying gestural communication in great apes is crucial to understanding language evolution. Although manual and bodily gestures are considered distinct at a neural level, there has been very limited consideration of potential differences at a behavioural level. In this study, we conducted naturalistic observations of adult wild East African chimpanzees (Pan troglodytes schweinfurthii) in order to establish a repertoire of gestures, and examine intentionality of gesture production, use and comprehension, comparing across manual and bodily gestures. At the population level, 120 distinct gesture types were identified, consisting of 65 manual gestures and 55 bodily gestures. Both bodily and manual gestures were used intentionally and effectively to attain specific goals, by signallers who were sensitive to recipient attention. However, manual gestures differed from bodily gestures in terms of communicative persistence, indicating a qualitatively different form of behavioural flexibility in achieving goals. Both repertoire size and frequency of manual gesturing were more affiliative than bodily gestures, while bodily gestures were more antagonistic. These results indicate that manual gestures may have played a significant role in the emergence of increased flexibility in great ape communication and social bonding.