Testing use of the first multi-partner cognitive enrichment devices by a group of male bottlenose dolphins

Animal Cognition - Alliance formation plays a crucial part in male dolphins’ lives. These partnerships may last for decades or even for a lifetime; thus, partner choice and the maintenance of...     

Memory traces compete under regimes of limited Arc protein synthesis: Implications for memory interference

Recently encoded information can be lost in the presence of new information, a process called 'retrograde interference'. Retrograde interference has been extensively described for more than a century; however, little is known about its underlying mechanisms. Different approaches agree on the need of the synthesis of plasticity related proteins (PRPs) to consolidate a long-term memory (LTM). Our hypothesis is that when PRPs are limited, interference of a task over LTM formation of another may be due to the utilization of protein resources common to both tasks. Here, by combining the tasks of inhibitory avoidance (IA) and open field (OF) exploration in rats, we show that memory traces compete for their stabilization if PRPs are limited. As a result, LTM is formed for only one of the tasks with a consequent decrease in the memory for the other. Furthermore, infusing Arc antisense oligonucleotide into the dorsal hippocampus, we found that Arc is necessary for LTM formation of these two types of learning tasks and is one of the PRPs that can be shared between them when animals are trained in both OF and IA. In sum, these findings suggest that under conditions of reduced protein availability, a learning task interferes with LTM formation of another by using the available PRPs.     

Re-enactment of intended acts from a video presentation by 18- and 24-month-old children

We used the Re-enactment of intention paradigm to investigate whether children would re-enact what an adult intended to do in a video presentation as they do when presented with a live demonstration (Meltzoff in Dev Psychol 31(5):838-850, 1995). Unlike the 18-month-old infants studied by Meltzoff (Dev Psychol 31(5):838-850, 1995), the 18- and 24-month-olds in the current study did not frequently imitate unsuccessful goal-directed actions presented in a video model. Children who performed better in the task also tended to share more of their attention with the experimenter during co-viewing of the video. Performance on the Re-enactment of intention task was positively related to categorization score, an independent measure of cognitive functioning.     

Sampling and Data Collection Methods in Sales Force Research: Issues and Recommendations for Improvement

Samples used in sales force research studies found in JM, JMR, JPSSM, and IMM over a seventeen year period were examined to discover the extent to which sales force sampling has met the issues of covering different industries and types of salespeople, of satisfying technical sampling requirements, and of clearly reporting on sampling methods. Recommendations for improving standards for conducting and reporting sales force sampling methodology in terms of the resources available are offered.     

Processing Speed Weakness in Children and Adolescents with Non-Hyperactive but Inattentive ADHD (ADD)

DSM-IV-TR defines ADHD-Predominantly Inattentive as allowing up to five symptoms of hyperactivity/impulsivity, while theories of the inattentive type usually assume a group that is hypoactive and characterized by processing speed and cognitive interference deficits. In a community-recruited sample of 572 children and adolescents, a pure inattentive subtype of ADHD (ADD) was defined as those who met DSM-IV-TR criteria for ADHD-PI but had two or fewer hyperactive/impulsive symptoms. Processing and output speeds of those with ADD were compared to those identified with DSM-IV-TR ADHD combined type and non-ADHD controls. These results were then contrasted with those found when DSM-IV-TR defined ADHD-PI was compared with ADHD-C and controls. Processing and output speed were assessed with the Trailmaking A and B and the Stroop Naming Tests. Cognitive interference control was assessed with the interference score from the Stroop Task. Slower cognitive interference speed was found in the ADD vs. ADHD-C and controls comparisons, but not the ADHD-PI versus ADHD-C and controls comparisons. On output speed measures, ADD exhibited the slowest performance, significantly different from controls and the effect size for the set-shifting speed contrast (Trailmaking B) was double that of the ADHD-PI vs. control comparison. ADHD-Inattentive type as defined by the DSM-IV-TR is a heterogeneous condition with a meaningful proportion of those affected exhibiting virtually no hyperactive/impulsive symptoms. This subgroup may represent a distinct inattentive condition characterized by poor cognitive interference control and slow processing or output speed.     

Fathering Self-Efficacy, Marital Satisfaction and Father Involvement in Hong Kong

We examined the predictability of fathering self-efficacy and marital satisfaction on father involvement. The moderating effect of marital satisfaction on the relationship between father efficacy and father involvement was also explored. A cross-sectional survey was conducted using the convenience sampling method. A total of 2,029 valid questionnaires were collected from fathers with children aged 2–6 from 48 nurseries in Hong Kong. The fathers’ mean age is 39.1. 72.9 % of the fathers graduated from secondary school and 86 % had full-time jobs. Measures including self-efficacy subscale in the Parenting Sense of Competency Scale, the Index of Marital Satisfaction, the Inventory of Father Involvement were adopted in the present study. Hierarchical regression analyses showed that fathering self-efficacy and marital satisfaction were significant positive predictors of father involvement, whereas marital satisfaction moderated the effect of fathering self-efficacy on father involvement. It is thus important to improve martial satisfaction and enhance fathering self-efficacy for promoting father involvement. To gain a more comprehensive picture, future studies of father involvement may benefit by adopting a longitudinal research design, including the mothers and children as informants, and addressing other parenting correlates such as parenting stress and spousal support.     

When does social learning become cultural learning?

Developmental research on selective social learning, or ‘social learning strategies’, is currently a rich source of information about when children copy behaviour, and who they prefer to copy. It also has the potential to tell us when and how human social learning becomes cultural learning; i.e. mediated by psychological mechanisms that are specialized, genetically or culturally, to promote cultural inheritance. However, this review article argues that, to realize its potential, research on the development of selective social learning needs more clearly to distinguish functional from mechanistic explanation; to achieve integration with research on attention and learning in adult humans and ‘dumb’ animals; and to recognize that psychological mechanisms can be specialized, not only by genetic evolution, but also by associative learning and cultural evolution.     

An Integrated Resilience and Ecological Model of Child Abuse (REC-Model)

Much of the theories of child abuse are developed and referenced from the West, while their applications to Chinese society are unclear. It is necessary to examine the cases in Hong Kong to acknowledge the uniqueness in perception and conceptualization of child abuse and the impact of resilience, across different cultural settings. The current study aims to advance an ecological model of child abuse for Hong Kong families by integrating resilience perspective with the ecological systems, namely An Integrated Resilience and Ecological Model of Child Abuse (REC-Model), and to examine the interactions between resilience and risk factors among chronosystemic, microsystemic, marcosystemic, and ontogenic systems on child abuse. Using a cross sectional survey research method and path analysis, 565 families with children studying at ages between 9 and 13 participated and returned self-administered questionnaires in the study. The results showed that Chinese cultural parenting values moderated the influences of risk factors on child abuse, while forgiveness buffered the negative impact of microsystemic factors on child abuse. To prevent child abuse, it is important to decrease the detrimental effects of childhood abuse experiences, reduce marital conflicts, and avoid developing insecure parent-child attachment. Promoting forgiveness, while reducing parents’ rigidity of certain Chinese cultural parenting values, may also help decrease child abuse.     

Reduced ADHD symptoms in adults with ADHD after structured skills training group: results from a randomized controlled trial

Objective

Feasibility, acceptability, and efficacy of a Dialectical Behavioral Therapy (DBT) -based method developed in Germany were evaluated in a Swedish outpatient psychiatric context.

Method

Fifty-one adults with ADHD on stable medical treatment or on no medication were randomized to the DBT-based skills training (n = 26) or a parallel loosely structured discussion group (n = 25). Self-rating scales were administered before randomization and after the treatment.

Results

Feasibility and participant satisfaction were good in both groups while skills training was perceived as more logical and effective for ADHD-related problems. The analyses of the individuals who completed the treatment and remained stable with regard to medication (n = 19 in skills training; n = 18 in control group) showed a significant reduction in ADHD symptoms in the skills training group, but not in the control group. No reduction of comorbidity was observed in any of the groups.

Conclusions

The treatment was feasible in an outpatient psychiatric context, well tolerated, and significantly reduced ADHD symptoms in on-treatment individuals who remained stable regarding medication status.