Using deferred imitation to understand the process of change in infant memory development

In their commentaries, Carver, Richmond and DeBoer pose several challenging and insightful questions in response to our target article. Two key themes emerged from their commentaries, which are important in the field of infant memory research. The first concerns the use of deferred imitation as a paradigm, and its relationship to other methods of assessing infant cognition. The second concerns understanding the process of change observed in infant memory. How do maturation and experience interact to produce developmental change, and what theories can best account for changes in representational flexibility in early infancy? We will address each area and the implications these questions have for the direction of future research. Copyright © 2006 John Wiley & Sons, Ltd.     

Quality of Life in Gulf War Veterans: the Influence of Recency and Persistence of Psychiatric Morbidity

Important contributors to quality of life (QOL), such as psychosocial factors, have received limited exploration in veteran populations, in contrast to a significant amount of research focused on health-related quality of life (HRQL). This study investigated QOL and HRQL amongst Gulf War veterans compared with an era-military comparison group 20 years after the 1990/91 Gulf War, and whether psychiatric status over time and psychiatric comorbidities predicted QOL and HRQL. We then investigated which of a range of psychological health, physical health and social factors contribute greatest to QOL. Psychological interviews and postal questionnaires were administered to a cohort of Gulf War veterans and a military-era comparison group in 2000–02 and 2011–12. Gulf War veterans had poorer QOL and HRQL compared with a military comparison group, but the pattern of factors that influenced QOL was the same for both groups. Poorer QOL and HRQL were significantly associated with more recent and persistent psychiatric morbidity over time. Further analyses showed that affective disorders, followed by anxiety disorders had the largest impact on QOL and HRQL, and that QOL and HRQL were negatively affected by each additional psychiatric diagnosis. The importance of these findings was highlighted in a structural equation model that revealed psychological health contributed most to QOL, social support contributed a moderate amount, but physical health contributed only a very small amount. QOL in veterans is an important issue even many years after deployment and psychological health plays a predominant role in QOL.

     

Examining HPA-axis functioning as a mediator of the relationship between depression and cognition across the adult lifespan

Altered HPA-axis functioning is a hypothesized mechanism for worsened cognition in depression. The current study examines the indirect effects of depression on processing speed, executive functioning, and memory as a function of the HPA-axis. 38 individuals with a depression diagnosis and 50 healthy controls (HCs) aged 18–86 underwent neuropsychological testing and at-home diurnal salivary cortisol collection. Depression was assessed via structured clinical interviews and rating scales. Cognitive composite scores were derived from factor analysis. Daytime cortisol exposure was estimated using area under the curve (AUC). Depression was associated with higher cortisol levels and slower processing speed . A significant suppression effect of AUC was present on the relationship between depression and processing speed. Limitations include the cross-sectional design and limited sample heterogeneity. Though poorly modulated HPA-axis is one proposed mechanism of cognitive alterations in depression, our results did not support this conclusion for processing speed. Alternative mechanisms should be considered to inform interventions to target cognitive alterations in depression.     

Stress and inflammation among older adults: The moderating role of religiosity

Chronic stress weakens the immune system and leads to heightened bodily inflammation, which in turn is linked with serious health conditions. This study examined whether religiosity moderates the relationship between stress and inflammation (measured by C-reactive Protein (CRP)). A sample of 4,734 community-dwelling older adults was drawn from the 2006 wave of the Health and Retirement Study. Logistic regression was used to analyze the relationship between chronic stress (8-item index), inflammation (high CRP level), and religiosity (organizational, nonorganizational, and intrinsic), controlling for other factors. Higher levels of stress were significantly associated with high inflammation/CRP (p = .039). Further, intrinsic religiosity acted as a moderator of this relationship (p = .024), such that the relationship between stress and inflammation is lessened for persons with higher levels of intrinsic religiosity. Higher intrinsic religiosity attenuated the effects of stress on inflammation, suggesting that individuals with stronger religious commitment/motivation may better cope with stress.     

What is threatening about refugees? Identifying different types of threat and their association with emotional responses and attitudes towards refugee migration

Threat is one of the most important predictors for attitudes towards refugees and migration. The current research addresses the role of different threat types and emotional reactions in the context of refugee migration with a multi-method approach. Using qualitative (Study 1, N = 202) and quantitative (Studies 2–4, N = 873) methods, we identified six types of threat that majority group members in Germany experience in the face of refugee migration: Concerns about cultural differences (symbolic threat), financial strain (realistic threat), criminal acts (safety threat), conflicts within society (cohesion threat), increasing xenophobia (prejudice threat), and refugee care (altruistic threat). All these threat types elicited negative emotions and were associated with negative attitudes towards refugees and support for restrictive migration policies. Paradoxically, concerns about refugee care predicted support for restrictive migration policies particularly well (altruistic threat paradox), which can be explained by a lack of emotional responses to this type of threat. Based on these findings, we propose a bidirectional model of intergroup threat.     

Factor analysis and validation of a self-report measure of impaired fear inhibition

Difficulties with inhibiting fear have been associated with the emergence of anxiety problems and poor response to cognitive–behavioural treatment. Fear inhibition problems measured using experimental paradigms involving aversive stimuli may be inappropriate for vulnerable samples and may not capture fear inhibition problems evident in everyday life. We present the Fear Inhibition Questionnaire (FIQ), a self-report measure of fear inhibition abilities. We assess the FIQ’s factor structure across two cultures and how well it correlates with fear inhibition indices derived experimentally. Adolescent participants from Hong Kong and England completed the FIQ, with the English participants also completing a conditioning and extinction task to assess fear inhibition problems. Across both cultures, the FIQ showed a single factor structure and low FIQ scores, or worse fear inhibition problems, were associated with self-reports of heightened anxiety. Correlation of FIQ scores with experimental indices, whilst controlling for anxious symptoms, suggests that the FIQ represents a valid and unique measure of fear inhibition abilities. The FIQ might be used to assess more ecologically valid fear inhibition problems particularly amongst people who have or who are at risk of anxiety diagnoses.     

Flickering admissibility: neuroimaging evidence in the U.S. courts

This article explores the admissibility of neuroimaging evidence in U.S. courts, recognizing various trends in decisions about such evidence.While courts have routinely admitted some neuroimages, such as CT scans and MRI, as proof of trauma and disease, they have been more circumspect about admitting the PET and SPECT scans and fMRI evidence. With the latter technologies, courts have often expressed reservations about what can be inferred from the images. Moreover, courts seem unwilling to find neuroimaging sufficient to prove either insanity or incompetency, but are relatively lenient about admitting neuroimages in death penalty hearings. Some claim that fMRI and "brain fingerprinting" are able to detect deception. Other scholars argue that brain fingerprinting is a dubious concept and that fMRI is not yet sufficiently reliable. Moreover, there are substantial concerns about privacy and the perils of mind reading implicit in such technology. Yet, there is a movement to try to make these new technologies "courtroom ready" in the near future, raising a host of legal, policy, and ethical questions to be answered.     

Alcohol Use in Adolescent Twins and Affiliation with Substance Using Peers

Affiliation with substance using peers is one of the strongest predictors of adolescent alcohol use. This association is typically interpreted causally: peers who drink incite their friends to drink. This association may be complicated by uncontrolled genetic and environmental confounds because teens with familial predispositions for adolescent substance use may be more likely to select into social networks where drinking is common. We test this alternative hypothesis using a sample of 1,820 twin and sibling pairs, and their same-sex best friends, from three waves of the National Longitudinal Study of Adolescent Health. Across all three waves, peer report of substance use did not influence adolescent alcohol use when genetic and shared environmental predispositions for drinking were considered. The association between alcohol use and peer behavior may be a spurious association attributable to a shared genetic liability to drink alcohol and associate with peers who drink alcohol.     

Prosodic phonological representations early in visual word recognition

Two experiments examined the nature of the phonological representations used during visual word recognition. We tested whether a minimality constraint (R. Frost, 1998) limits the complexity of early representations to a simple string of phonemes. Alternatively, readers might activate elaborated representations that include prosodic syllable information before lexical access. In a modified lexical decision task (Experiment 1), words were preceded by parafoveal previews that were congruent with a target's initial syllable as well as previews that contained 1 letter more or less than the initial syllable. Lexical decision times were faster in the syllable congruent conditions than in the incongruent conditions. In Experiment 2, we recorded brain electrical potentials (electroencephalograms) during single word reading in a masked priming paradigm. The event-related potential waveform elicited in the syllable congruent condition was more positive 250-350 ms posttarget compared with the waveform elicited in the syllable incongruent condition. In combination, these experiments demonstrate that readers process prosodic syllable information early in visual word recognition in English. They offer further evidence that skilled readers routinely activate elaborated, speechlike phonological representations during silent reading.