Dog and owner characteristics predict training success

Animal Cognition - Teaching owners how to train their dogs is an important part of maintaining the health and safety of dogs and people. Yet we do not know what behavioral characteristics of dogs...     

Performance of Asian elephants (Elephas maximus) on a quantity discrimination task is similar to that of African savanna elephants (Loxodonta africana)

Animal Cognition - Using an object-choice task, we measured the relative quantity discrimination ability of Asian elephants. Two zoo-housed elephants were given auditory cues of food being dropped...     

A characterization of individual differences in prospective memory monitoring using the Complex Ongoing Serial Task

Prospective memory--remembering to retrieve and execute future goals--is essential to daily life. Prospective remembering is often achieved through effortful monitoring; however, potential individual differences in monitoring patterns have not been characterized. We propose 3 candidate models to characterize the individual differences present in prospective memory monitoring: attentional focus, secondary memory retrieval, and information thresholding. Two experiments using a novel paradigm, the Complex Ongoing Serial Task (COST), investigated the resource allocation patterns underlying individual differences in monitoring. Individuals exhibited differential resource allocation patterns, and the differences remained relatively stable across experimental sessions. Resource allocation patterns associated with information thresholding (high prospective memory, preserved ongoing task performance) and attentional focus (high prospective memory, inefficient ongoing task performance) were superior to secondary memory retrieval (low prospective memory, very inefficient ongoing task performance). Importantly, personality (openness, prevention focus) and cognitive (primary, working, and secondary memory) individual differences influenced monitoring patterns. This research represents the first explicit attempt to elucidate individual differences in prospective memory monitoring patterns.     

A feeling for the future: How does agency in time metaphors relate to feelings?

Most cultures have metaphors for time that involve movement, for example, ‘time passes’. Although time is objectively measured, it is subjectively understood, as we can perceive time as stationary, whereby we move towards future events, or we can perceive ourselves as stationary, with time moving past us and events moving towards us. This paper reports a series of studies that first examines whether people think about time in a metaphor‐consistent manner (Study 1) and then explores the relationship between ‘time perspective’, level of perceived personal agency, and time representations (Study 2), the relationship between emotional experiences and time representation (Study 3), and whether this relationship is bidirectional by manipulating either emotional experiences (Study 4) or time representation (Study 5). Results provide bidirectional evidence for an ego‐moving representation of time, with happiness eliciting more agentic control, and evidence for a time‐moving passivity associated with emotional experiences of anxiety and depression. This bidirectional relationship suggests that our representation of time is malleable, and therefore, current emotional experiences may change through modification of time representations. Copyright © 2012 John Wiley & Sons, Ltd.     

Effect of increased load on scapular kinematics during manual wheelchair propulsion in individuals with paraplegia and tetraplegia

Repetitive loading of the upper extremity musculature during activities like wheelchair propulsion can lead to fatigue of surrounding musculature causing irregular segment kinematics. The goal of this study was to determine the effect of increase in load on the kinematics of the scapula in users with paraplegia and tetraplegia. Data were collected on 18 participants (11 with paraplegia and 7 with tetraplegia) using an electromagnetic motion tracking system (100Hz) and force sensing pushrim (200Hz). The participants propelled under no load and loaded conditions at their customary propulsion velocity. On average a 60N increase in force was elicited with the experimental protocol. Users with tetraplegia showed significant increases (p<.05) in the rate of change of scapular angles in the upward/downward rotation and the retraction/protraction direction under the loaded conditions, whereas users with paraplegia only showed difference in the retraction/protraction rotation direction. Overall both user populations moved towards position of increased downward rotation, anterior tilt and protraction with increase in load hence increasing the risk of impingement. This experiment adds depth to our understanding of dynamic scapular kinematics during wheelchair propulsion under different loading conditions and differences in scapular control between users with paraplegia and tetraplegia.     

Development and Preliminary Evaluation of a Cognitive-Behavioral Intervention for Perinatal Grief

Perinatal loss, typically defined as fetal death beyond 20 weeks gestation through infant death 1-month postpartum, is a potentially traumatizing experience for parents occurring in approximately 1% of births in the United States. Although many women recover, 15% to 25% have enduring grief-related symptomatology and functional impairment. Perinatal grief is a unique bereavement experience, but clinical resources for detecting and treating severe perinatal grief are rare and interventions are largely without empirical support. We developed and pilot tested a cognitive-behavioral intervention targeting the psychological and behavioral sequelae of perinatal bereavement. To initially evaluate the feasibility and efficacy of the intervention, 5 women who suffered a perinatal loss were randomized to a 2-week, 4-week, or 6-week baseline period in a multiple-baseline single-case experimental design. In most cases, after the respective baseline periods, there was a steady decline in reported grief symptoms. These gains were largely maintained at a 6-week follow-up assessment. This study provides initial evidence in support of future research and clinical efforts tailoring cognitive behavioral interventions to meet the specific needs of women who experience perinatal loss.     

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.     

Putting theory of mind in its place: psychological explanations of the socio-emotional-communicative impairments in autistic spectrum disorder

In this review, the history of the theory of mind (ToM) theory of autistic spectrum disorder (ASD) is outlined (in which ToM is indexed by success on false belief tasks), and the explanatory power and psychological causes of impaired ToM in ASD are critically discussed. It is concluded that impaired ToM by itself has only limited explanatory power, but that explorations of the psychological precursors of impaired ToM have been fruitful in increasing understanding of mindreading impairments in ASD (where 'mindreading' refers those abilities that underlie triadic interaction as well as ToM). It is argued that early explanations of impaired mindreading are untenable for various reasons, but that impairments of dyadic interaction in ASD that could lead to impaired ability to represent others' mental states may be the critical psychological cause, or causes, of impaired ToM. The complexity of causal routes to impaired ToM is emphasized.     

Areas of Marital Dissatisfaction Among Long‐Term Couples

To better understand relational dissatisfaction and duration of long‐term married couples, this study surveyed 30 couples married at least 40 years with the Marital Satisfaction Inventory. Findings suggest various areas of dissatisfaction (e.g., affective communication, conflict over child rearing) and relationship among and link to other areas of dissatisfaction (e.g., finances, sex).