3D Multiple Object Tracking Boosts Working Memory Span: Implications for Cognitive Training in Military Populations

Recently, there has been much theoretical and applied interest in the prospects of cognitive training for improving cognition. NeuroTracker is a relatively recent training device for improving dynamic attention in athletes by training 3D multiple-object tracking skills. We examined its effectiveness for improving working memory (WM) span in members of the Canadian Armed Forces (CAF) by randomly assigning participants to the experimental (NeuroTracker), active control (adaptive dual n-back task), or passive control (no contact) conditions. NeuroTracker training resulted in significant gains in verbal, visual, and matrix span. No gain was observed in the active or passive control group. These results suggest that NeuroTracker could be a useful training tool for increasing WM span in military samples. Future studies could examine the effects of NeuroTracker training on militarily relevant performance measures that draw on WM span.     

Acute Intellectual Effects of Pediatric Head Trauma

The current study compared Wechsler Intelligence Scale for Children-III (WISC-III) performances of 30 children who sustained head injury with the performance of orthopedic controls matched on gender, age, race, and parental education and occupational attainment. Children were followed during initial hospitalization, trauma severity variables were recorded, and duration of posttraumatic amnesia (PTA) was determined by serial testing of mental status. The WISC-III was administered immediately following resolution of amnesia. Although the majority of patients sustained mild injuries, children with head injuries obtained significantly lower IQ and factor scores than nonneurologically injured children. Consistent with past research, performance-based scores including Performance IQ, Perceptual Organization, and Processing Speed were more sensitive to head trauma than their verbal counterparts. Standardized measurement of PTA appeared to be a better predictor of IQ status following injury than Glasgow Coma Scale score on admission or length of unconsciousness.     

Brief report: Relationship between performance testing and parent report of attention and executive functioning profiles in children following perinatal arterial ischemic stroke

Children with perinatal arterial ischemic stroke (PAIS) have increased rates of attention and executive functioning (EF) weaknesses. Research in other pediatric disorders has documented poor consistency between parent report of these skills and performance-based measures. We compared these data sources in children with PAIS. Forty full-term (≥37 weeks) children ages 3–16 (median = 7.2 years; 58% male) with PAIS completed neuropsychological testing and composite scores were created for seven attention and EF domains (Processing Speed; Attention; Working Memory; Verbal Retrieval; Inhibitory Control; Flexibility/Shifting; Planning). Parents completed “real-world” functioning questionnaires (ADHD Rating Scale-IV, BRIEF). Correlational analysis were used to compare parent and performance measures. Correlations between ADHD Rating Scale-IV scores and the performance-based Attention and Inhibition composite scores were nonsignificant. Significant negative correlations were found between the BRIEF GEC and performance-based Verbal Retrieval and Processing Speed composites, but remaining GEC/composite comparisons were nonsignificant. Analyses between parent report BRIEF index scores and the corresponding performance-based domain identified one significant negative correlation between the BRIEF Working Memory Index and the Working Memory composite score. While children with PAIS demonstrate difficulties in attention and EF on both parent report and performance measures, little significance was found in comparisons of these two types of measures. There may be several explanations for this dissociation: measures assessing different aspects of the same underlying construct; performance-based measures lacking ecological validity; and parents underestimating/underreporting their child’s deficits. Thus, multiple sources of informant and performance data are necessary to make more accurate conclusions about functioning in these domains.     

Novel associative processing and aging: effect on creative production

ABSTRACT

Creative production has been reported to decline with age. This study investigated age-related differences in creative verbal production. Participants were 30 younger and 30 older adults. Study testing included language and cognitive assessments and the experimental task wherein participants created short stories incorporating words that are not commonly related, semantically or associatively. The resulting stories were rated by independent blinded judges for originality, cohesion, appropriateness, and organization. Younger adults' stories were rated as being significantly more original and more appropriate. Integrating unrelated words to create original stories requires activating widely distributed lexical-semantic networks to develop novel associations. Potential decreased neural network connectivity due to white matter degradation, commonly seen in normal aging, as well as decrements in front-executive disengagement may have affected older adults' performance on this story creation task. Future research using neuroimaging may elucidate possible neuroanatomic correlates of age-related changes in associative creative production..     

Exploring the Contribution of the Caring Climate to the Youth Sport Experience

The purpose of this study was to examine the relationship between young athletes’ perceptions of the caring climate on their soccer teams to their enjoyment, attitudes and, behaviors toward their coach and teammates, and commitment to the sport. Athletes (N = 184) in a community soccer league volunteered to complete a survey. Results revealed that athletes who perceived a caring climate on their teams were significantly more likely to report higher enjoyment, more positive attitudes towards their coaches/teammates, greater commitment to soccer, and engage in more caring behaviors towards their coaches/teammates. Results suggest that a caring climate may benefit young athletes.     

Racial differences in sexual activity among affluent adolescents: a relative status approach

ABSTRACT

The experiences of black Americans vary widely depending on socioeconomic status (SES), suggesting that a monotonic view of race is inadequate when examining race differences in adolescent risk behavior. This study considers how class and race intersect as determinants of adolescent multiple sexual partnering. Using data from the National Longitudinal Study of Adolescent Health (N = 3,538), the study adjudicates among three theoretical perspectives, including a relative status hypothesis that draws on Bourdieu’s insights on distinction and Steele’s concept of “stereotype threat.” Findings support the relative status approach: affluent black adolescents have considerably lower odds of engaging in multiple partnering than comparably advantaged whites, suggesting they adjust their behavior to counter stereotypes of “promiscuous” black adolescents.     

Geometric cues,reference frames,and the equivalence of experienced-aligned and novel-aligned views in human spatial memory

Spatial memories are often organized around reference frames, and environmental shape provides a salient cue to reference frame selection. To date, however, the environmental cues responsible for influencing reference frame selection remain relatively unknown. To connect research on reference frame selection with that on orientation via environmental shape, we explored the extent to which geometric cues were incidentally encoded and represented in memory by evaluating their influence on reference frame selection. Using a virtual environment equipped with a head-mounted-display, we presented participants with to-be-remembered object arrays. We manipulated whether the experienced viewpoint was aligned or misaligned with global (i.e., the principal axis of space) or local (i.e., wall orientations) geometric cues. During subsequent judgments of relative direction (i.e., participants imagined standing at one object, facing a second object, and pointed toward a third object), we show that performance was best when imagining perspectives aligned with these geometric cues; moreover, global geometric cues were sufficient for reference frame selection, global and local geometric cues were capable of exerting differential influence on reference frame selection, and performance from experienced-imagined perspectives was equivalent to novel-imagined perspectives aligned with geometric cues. These results explicitly connect theory regarding spatial reference frame selection and spatial orientation via environmental shape and indicate that spatial memories are organized around fundamental geometric properties of space.     

Religion and Rights: The Illusion of Freedom and the Reality of ControL

This paper examines legal guarantees of freedom of religion through the vehicle of rights using a case study of a Jehovah's Witness member in Calgary, Alberta, Canada, who refused to receive blood transfusions prescribed as part of her cancer treatment. The paper examines the pervasive concept of risk of harm that has recently become part of legal discourse in the balancing of rights process. The notion of governance is used to examine the social control of the individual and the deviant population. Aspects of both governmentality and resistance are explored.     

What Is a Conventional Object Function? The Effects of Intentionality and Consistency of Use

By preschool age, children have a sophisticated assumption about the conventional nature of various kinds of information. The present studies investigated the role of two cues in 2- and 3-year-olds' determination of what is conventional, namely the intentionality and intra-individual consistency in the use of objects. Overall, in Study 1, both 2- and 3-year-olds were more likely to say that the expected use and purpose of an object was a function intentionally and consistently demonstrated. In Study 2, 3-year-olds but not 2-year-olds generalized their expectation about the conventionality of an intentionally demonstrated function to another agent's learning of the function. These findings shed light on how children's assumption of what is conventional gets refined via children's intuitive interpretive dispositions regarding human actions.