SEARCHING FOR ANOTHER EARTH: THE RECENT HISTORY OF THE DISCOVERY OF EXOPLANETS

The discovery of exoplanets is a small part of the array of scientific arguments for and against the existence of extraterrestrial intelligence. Yet the recent stunning achievement of this program of observational astronomy has had a significant effect on scientific opinion and public interest. It also raises some key theological questions. New observing techniques are leading to the discovery of extrasolar planets daily. Earth‐like planets outside of our Solar System can now be identified and in future years explored for signs of life. This article maps the history of these discoveries and highlights some of the theological issues which are important to bring into dialogue with these scientific insights.     

Examining the Intensity and Frequency of Experience of Discrete Positive Emotions

Research into positive emotions has grown significantly over the last decade. This has focused typically on aggregate positive emotions, despite increasing evidence for differential outcomes from discrete positive emotions. We examined the intensity and frequency of experience of 50 discrete positive emotions in a sample of 500 participants. Results showed that the most frequently experienced positive emotions were Interested, Curious, Friendly, Amused and Positive. The most intensely experienced positive emotions were Happy, Optimistic, Friendly, Interested and Determined. Women scored higher than men on the frequency of experience of 12 positive emotions; men scored higher for Ecstatic only. Women scored higher than men on the intensity of experience of 6 positive emotions, whereas men scored higher on the intensity of experience of three positive emotions. Analyses with age showed findings broadly consistent with the U-curve of life satisfaction across the life span. The discussion focuses on how these data can inform and support future positive emotions research, and the importance of considering discrete positive emotions.     

Romantic heartbreak: Prevalence,personality traits,and personal stories

Across four studies (N = 4,381, M_age = 39.17 years, 56% female, 67% White, 12% Hispanic/Latinx, 11% Asian/Pacific Islander, and 9% Black/African American) the experience of heartbreak was considered within trait and narrative research paradigms. Participants indicated if they have ever experienced, and were currently experiencing, heartbreak. Personality traits, attachment styles, and narrative accounts of heartbreak were also assessed. Across all studies, 82% of participants indicated experiencing heartbreak and this event was largely unrelated to demographic and personality characteristics whereas 14% of participants reported being in a current state of heartbreak and these individuals were more likely to be single, neurotic, and insecurely attached. Lastly, storying heartbreak as leading to self‐improvement related positively with secure attachment.     

The development and content of an interpersonal psychotherapy group for postnatal depression

Postnatal depression (PND) usually causes distressing symptoms for sufferers and significant impairments in relationships. Group Interpersonal Psychotherapy (IPT-G) provides the experienced therapist with a brief, focused, and manualized approach to helping women recover from the debilitating effects of PND. This paper describes the background and development of IPT-G for PND. The evidence for the effectiveness of individual and group IPT formats with this population is summarized. The triad of theories underpinning IPT are discussed with an emphasis on the important role of attachment styles during the transition to parenthood. Its strengths, which include its unique package of targets, tactics, and techniques, are highlighted. The benefits and challenges of IPT-G are also explored, and the results of a randomized controlled trial are summarized. Finally, a case study illustrates how IPT-G specifically addresses the social role transitions, conflicts, losses, and social isolation that mothers commonly experience.     

Developmental effects of acute, chronic, and withdrawal from chronic nicotine on fear conditioning

Pre-adolescence and adolescence are developmental periods associated with increased vulnerability for tobacco addiction, and exposure to tobacco during these periods may lead to long-lasting changes in behavioral and neuronal plasticity. The present study examined the short- and long-term effects of nicotine and nicotine withdrawal on fear conditioning in pre-adolescent, adolescent, and adult mice, and potential underlying substrates that may mediate the developmental effects of nicotine, such as changes in nicotinic acetylcholine receptor (nAChR) binding, CREB expression, and nicotine metabolism. Age-related differences existed in sensitivity to the effects of acute nicotine, chronic nicotine and nicotine withdrawal on contextual fear conditioning (no changes in cued fear conditioning were seen); younger mice were more sensitive to the acute effects and less sensitive to the effects of nicotine withdrawal 24 h post treatment cessation. Developmental differences in nAChR binding were associated with the effects of nicotine withdrawal on contextual learning. Developmental differences in nicotine metabolism and CREB expression were also observed, but were not related to the effects of nicotine withdrawal on contextual learning 24 h post treatment. Chronic nicotine exposure during pre-adolescence or adolescence, however, produced long-lasting impairments in contextual learning that were observed during adulthood, whereas adult chronic nicotine exposure did not. These developmental effects could be related to changes in CREB. Overall, there is a developmental shift in the effects of nicotine on hippocampus-dependent learning and developmental exposure to nicotine results in adult cognitive deficits; these changes in cognition may play an important role in the development and maintenance of nicotine addiction.     

Influence of the restored work-hardening rate on ductility studied by X-ray computed tomography

Abstract

Void growth and coalescence in a model material containing an artificial three-dimensional void array (the estimated local void volume fraction was 1.1%) were investigated by X-ray computed tomography (=XCT). The initially tapered cylindrical voids became elongated along the principal straining direction by some amount of tensile plastic deformation, and then the work-hardening capacity in the intervoid matrix was restored by an intermediate annealing. The annealed model material was pulled in tension all the way up to fracture to see if the existing void coalescence models can predict the void coalescence strain.     

Differentiating core and co-opted mechanisms in calculation: The neuroimaging of calculation in aphasia

The role of language in exact calculation is the subject of debate. Some behavioral and functional neuroimaging investigations of healthy participants suggest that calculation requires language resources. However, there are also reports of individuals with severe aphasic language impairment who retain calculation ability. One possibility in resolving these discordant findings is that the neural basis of calculation has undergone significant reorganization in aphasic calculators. Using fMRI, we examined brain activations associated with exact addition and subtraction in two patients with severe agrammatic aphasia and retained calculation ability. Behavior and brain activations during two-digit addition and subtraction were compared to those of a group of 11 healthy, age-matched controls. Behavioral results confirmed that both patients retained calculation ability. Imaging findings revealed individual differences in processing, but also a similar activation pattern across patients and controls in bilateral parietal cortices. Patients differed from controls in small areas of increased activation in peri-lesional regions, a shift from left fronto-temporal activation to the contralateral region, and increased activations in bilateral superior parietal regions. Our results suggest that bilateral parietal cortex represents the core of the calculation network and, while healthy controls may recruit language resources to support calculation, these mechanisms are not mandatory in adult cognition.     

The impact of egg incubation temperature on the personality of oviparous reptiles

Personality traits, defined as differences in the behavior of individual animals of the same species that are consistent over time and context, such as ‘boldness,’ have been shown to be both heritable and be influenced by external factors, such as predation pressure. Currently, we know very little about the role that early environmental factors have upon personality. Thus, we investigated the impact of incubation temperature upon the boldness on an oviparous reptile, the bearded dragon (Pogona vitticeps). Eggs, from one clutch, were incubated at two different average temperatures within the normal range. After hatching the lizards were raised under the same environmental conditions. Novel object and novel environment tests were used to assess personality. Each test was repeated in both the short term and the long term. The results revealed that incubation temperature did impact upon ‘boldness’ but only in the short term and suggests that, rather than influencing personality, incubation temperature may have an effect on the development of behavioral of oviparous reptiles at different stages across ontogeny.     

Impact of Tourette’s Disorder on Parent Reported Stress

We examined the relationship between Tourette’s Disorder (TD) and parent reported stress. About 84 parents of children with TD participated by completing questionnaires assessing parental stress, TD symptom severity, co-morbid disorders, services received by the child, and parents’ perception of their child’s academic ability. The results indicate that parent reported stress reached clinically significant levels when a co-morbid disorder was present, but not with a diagnosis of TD alone. Similarly, parents report higher levels of stress when they view their child as performing below other students academically. Finally, the types of services that the child receives were found to have little or no relationship to parent reported stress. Limitations of this study, directions for future research, and implications for intervention are discussed.