Characterizing the subjective experience of episodic past,future, and counterfactual thinking in healthy younger and older adults

Recent evidence demonstrates remarkable overlap in the neural and cognitive mechanisms underlying episodic memory, episodic future thinking, and episodic counterfactual thinking. However, the extent to which the phenomenological characteristics associated with these mental simulations change as a result of ageing remains largely unexplored. The current study employs adapted versions of the Memory Characteristics Questionnaire and the Autobiographical Interview to compare the phenomenological characteristics associated with both positive and negative episodic past, future, and counterfactual simulations in younger and older adults. Additionally, it explores the influence of perceived likelihood in the experience of such simulations. The results indicate that, across all simulations, older adults generate more external details and report higher ratings of vividness, composition, and intensity than young adults. Conversely, younger adults generate more internal details across all conditions and rated positive and negative likely future events as more likely than did older adults. Additionally, both younger and older adults reported higher ratings for sensory, composition, and intensity factors during episodic memories relative to future and counterfactual thoughts. Finally, for both groups, ratings of spatial coherence and composition were higher for likely counterfactuals than for both unlikely counterfactuals and future simulations. Implications for the psychology of mental simulation and ageing are discussed.     

Adrenergic enhancement of consolidation of object recognition memory

Extensive evidence indicates that epinephrine (EPI) modulates memory consolidation for emotionally arousing tasks in animals and human subjects. However, previous studies have not examined the effects of EPI on consolidation of recognition memory. Here we report that systemic administration of EPI enhances consolidation of memory for a novel object recognition (NOR) task under different training conditions. Control male rats given a systemic injection of saline (0.9% NaCl) immediately after NOR training showed significant memory retention when tested at 1.5 or 24, but not 96h after training. In contrast, rats given a post-training injection of EPI showed significant retention of NOR at all delays. In a second experiment using a different training condition, rats treated with EPI, but not SAL-treated animals, showed significant NOR retention at both 1.5 and 24-h delays. We next showed that the EPI-induced enhancement of retention tested at 96h after training was prevented by pretraining systemic administration of the beta-adrenoceptor antagonist propranolol. The findings suggest that, as previously observed in experiments using aversively motivated tasks, epinephrine modulates consolidation of recognition memory and that the effects require activation of beta-adrenoceptors.     

Parent–Child Communication's Attenuating Effects on Mexican Early Adolescents' Perceived Discrimination,Depressive Symptoms,and Substance Use

Utilizing general strain theory, we hypothesized that perceived discrimination would be positively associated with depressive symptoms, which in turn, would be associated with alcohol, cigarette, and marijuana use. Second, we hypothesized that frequency of mother–child and father–child communication against substance use would attenuate the hypothesized effects. Longitudinal survey data were collected from 247 Mexican‐heritage 6th‐ to 8th‐grade students. As hypothesized, perceived discrimination was positively associated with depressive symptoms, which, in turn, were positively associated with alcohol use and marginally related to marijuana use. Regarding moderation, for Mexican‐heritage early‐stage adolescents with high frequencies of mother–child or father–child communication, depressive symptoms were not significantly related to alcohol and marijuana use, although associations were significant for adolescents low in either type of communication.     

A hidden markov model-based analysis framework using eye-tracking data to characterise re-orientation strategies in minimally invasive surgery

Natural Orifice Translumenal Endoscopic Surgery (NOTES) represents a new paradigm in minimally invasive surgery whereby an operator uses a flexible instrument to navigate within an anatomical space. The flexible instrument is introduced via a natural body orifice such as the mouth to perform an operative intervention controlled by the surgeon without making incisions in the anterior abdominal wall. It differs from laparoscopic (traditional keyhole) surgery in two main ways: (1) the instruments used in NOTES are not rigid as in laparoscopic surgery and not specifically designed for this application; and (2) there are no incisions in the anterior abdominal wall. Disorientation during NOTES is a significant problem because as in laparoscopic surgery the operator typically uses a 2D camera-monitor interface for visualisation by the camera at the site of the operation. Furthermore, the positional cue offered by the external component (outside the body) of the camera is absent, and camera navigation is more cumbersome. When the operator is disorientated, it is important to be able to re-orientate quickly to minimise potential surgical errors. It is hypothesised that when surgeons become disorientated, there exist discrete patterns in psychophysical behaviour which are associated with effective re-orientation, and that these patterns are recognisable. In this study, we examine visual re-orientation behaviour in 18 subjects using eye-tracker data in a model comprised of selective image manipulation of everyday objects in a box trainer. We characterise effective behaviour using a fixation sequence similarity-based hidden Markov model. We show that the output of this algorithm is reliable in differentiating visual behavioural sequences, and that there are specific behavioural patterns and strategies associated with successful re-orientation in this model. Good re-orientation strategy appears to rely on identification and focus on a central object within the scene and judging position of its surrounding peripheral objects, suggesting integration of both geometric and feature information in a systematic way. Using selective, inconsistent feature cues for re-orientation were associated with less effective performance.     

Future Prospects,Deprivation, and Criminality – A Longitudinal Birth Cohort Study

The article explores the longitudinal relationship between subjective and objective deprivation in early adolescence on the one hand, and criminal offending in adolescence and early adulthood on the other. Data from the Stockholm Birth Cohort Study (n = 15,117), containing information from surveys and registers are used. Bivariate analyses confirm a relationship between low socioeconomic status and both subjective and objective deprivation. Subjective deprivation alone is related to offending only for those from less privileged background. Subjective and objective deprivation in combination is associated with a higher risk of offending for all individuals, although the less privileged background, the higher the risk.     

Communal coping and rumination in the aftermath of Chile earthquake: Multiple mediation analysis of the relationship between subjective severity and posttraumatic growth

Communal coping and collective participation were recently proposed as a potential mechanism that may favour not only individual's capacity to bounce back but also community cohesion and social well‐being and posttraumatic growth in the aftermath of natural disasters. To date, there is a lack of studies simultaneously assessing the effect of communal coping strategies and cognitive strategies on the development of posttraumatic growth. Therefore, the aim of this study was to examine the role of communal coping strategies and cognitive strategies such as intrusive and deliberated rumination as potential mediators between subjective severity of the event and posttraumatic growth and positive adjustment in the context of natural disaster. The questionnaire was administrated to 225 people affected by the most intense earthquake recorded in Chile in this century. The results of multiple mediation analysis showed that both cognitive strategies, such as deliberative rumination, and communal coping strategies, such as communal positive reappraisal and participation in spiritual rituals, are potential mediators between subjective severity and posttraumatic growth. Overall, the present work offers researchers and professionals interested in this area of study an interesting approach to analyse individual and collective coping strategies and its interrelation.     

Flow experience and the mobilization of attentional resources

The present study attempts to better identify the neurophysiological changes occurring during flow experience and how this can be related to the mobilization of attentional resources. Self-reports of flow (using a flow feelings scale) and attention (using thought probes), autonomic activity (heart rate, heart rate variability, and breathing rate), and cerebral oxygenation (using near-infrared spectroscopy) in two regions of the frontoparietal attention network (right lateral frontal cortex and right inferior parietal lobe) were measured during the practice of two simple video games (Tetris and Pong) played at different difficulty conditions (easy, optimal, hard, or self-selected). Our results indicated that an optimal level of difficulty, compared with an easy or hard level of difficulty led to greater flow feelings and a higher concentration of oxygenated hemoglobin in the regions of the frontoparietal network. The self-selected, named autonomy condition did not lead to more flow feelings than the optimal condition; however, the autonomy condition led to greater sympathetic activity (reduced heart rate variability and greater breathing rate) and higher activation of the frontoparietal regions. Our study suggests that flow feelings are highly connected to the mobilization of attentional resources, and all the more in a condition that promotes individuals’ choice and autonomy.