Dissecting online control in Developmental Coordination Disorder: a kinematic analysis of double-step reaching

In a recent study, children with movement clumsiness (or Developmental Coordination Disorder-DCD) were shown to have difficulties making rapid online corrections when reaching, demonstrated by slower and less accurate movements to double-step targets (Hyde & Wilson, 2011). These results suggest that children with DCD have difficulty using predictive estimates of limb position when making rapid adjustments to movement, in-flight. However, chronometric data alone does not provide strong evidence for this hypothesis: it remains unclear whether early (and rapid) control parameters or post-correction stages of the movement trajectory are affected. Thus, the overarching aim of this study was to conduct a kinematic analysis of double-step reaching in order to isolate the different control parameters that might explain the slower and less accurate double-step reaching performance of children with DCD. Participants were a new sample of 13 children with DCD aged between 8-12 years and 13 age-matched controls. Children were required to reach and touch one of three possible targets presented at the coordinates -20°, 0° and 20° on a 17 in. LCD touch-screen. For most trials (80%) the target remained stationary for the duration of movement (non-jump trials), while for the remainder (20%), the target jumped randomly to one of two peripheral locations at movement onset (jump trials). Consistent with earlier work, children with DCD were slower to initiate reaching compared to controls and showed longer MT and more errors on jump trials. Kinematic data showed that while the two groups did not differ on time to peak velocity or acceleration, children with DCD were slower to correct reach trajectory on jump trials. No group differences were observed on late kinematic markers, e.g., post-correction time. The pattern of results support and extend earlier work showing deficits in ROC in DCD. From a computational perspective, delayed corrections to the reach trajectory suggests some difficulty integrating information about the target perturbation with a predictive (or forward) estimate of limb position relative to the initial target. These conclusions are discussed, along with directions for future research.     

Socrates in the Platonic Dialogues

If Socrates is portrayed holding one view in one of Plato's dialogues and a different view in another, should we be puzzled? If (as I suggest) Plato's Socrates is neither the historical Socrates, nor a device for delivering Platonic doctrine, but a tool for the dialectical investigation of a philosophical problem, then we should expect a new Socrates, with relevant commitments, to be devised for each setting. Such a dialectical device – the tailor‐made Socrates – fits with what we know of other contributions to the genre of the Sokratikos Logos, to which Plato was neither the first nor the only contributor.     

Association between restricted and repetitive behaviors and nonverbal IQ in children with autism spectrum disorders.

The present study explored the relationship between nonverbal IQ and restricted and repetitive behaviors (RRBs) in 830 children with Autism Spectrum Disorders. The role of chronological age as a moderator of this relationship was also investigated. For many behaviors, there was a significant interaction between nonverbal IQ and chronological age, such that nonverbal IQ (NVIQ) was more strongly related to the prevalence of RRBs in older children. For the majority of such behaviors (e.g. repetitive use of objects, hand and finger mannerisms), RRB prevalence was negatively associated with NVIQ. However, the prevalence of certain behaviors (e.g. circumscribed interests) showed positive relationships with NVIQ, which provides some support for the idea of different classes of RRBs. For the severity of different RRBs, there were several significant effects for age and NVIQ, but few interactions.     

‘You can’t buy love’: trivializing and the challenge for religious education

While there has been an increase in empirical research which explores the spirituality of children, few studies have explicitly named and described factors which may inhibit children’s expression of their spirituality. This paper, emanating from the author’s own research into children’s spirituality in Australian Catholic primary schools, presents and describes one such factor, which has been termed trivializing. An example of hermeneutic phenomenological writing—the text—in which trivializing was revealed is presented, followed by a reflection upon the text guided by van Manen’s lifeworld existentials (lived body, lived time, lived space, lived human relations). In the light of this reflection some initial implications for nurturing the spirituality of children within the primary religious education classroom are presented.     

Identity configurations and well-being during normative cultural conflict: The roles of multiculturals’ conflict management strategies and academic stage

Multiculturals encounter normative cultural conflicts (intrapersonal conflicts between their cultures’ norms). Yet, no research has examined how these conflicts are managed, nor their antecedents and repercussions. This article examined how these conflicts are managed using two sets of conflict management strategies (active and agreeable) and tested whether they mediate the associations between identity configurations and well-being. Also, as the benefits of having integrated selves typically increase in later life stages, this article examined whether the associations between identity configurations and well-being differ between earlier (pre-university) and later academic stages (university). In Study 1 (N = 235), active strategies mediated the link between identity integration and well-being, whereas agreeable strategies mediated the link between compartmentalization and ill-being. In Study 2 (N = 241), these results were replicated. Study 2 further showed that the association between identity integration and well-being was stronger among university than pre-university students. Implications of these results are discussed.     

The role of community context and psychological well-being for physical health: A dyadic study of military couples

Drawing from the social organizational theory of community action and change (SOAC) within a systemic biopsychosocial perspective, associations between community context (military community connections and satisfaction with military life), psychological well-being (depressive symptoms, anxiety, and self-efficacy), and physical health were examined for a sample of active duty service members and their civilian spouses (N = 236 couples) using an actor partner interdependence framework. Service members with higher levels of military community connections reported better psychological well-being. When civilian spouses were more satisfied with military life, both partners reported better psychological well-being. In turn, both spouses’ psychological well-being was related to their own reports of physical health. Statistically significant indirect effects were found between community contexts and spouses’ physical health. Enhancing community connections may be an important leverage point for supporting health and family readiness.     

Scientific Integrity Principles and Best Practices: Recommendations from a Scientific Integrity Consortium

Science and Engineering Ethics - A Scientific Integrity Consortium developed a set of recommended principles and best practices that can be used broadly across scientific disciplines as a mechanism...     

Associations of physical activity and gross motor skills with executive function in preschool children from low‐income South African settings

Executive function is foundational for cognitive development. Previous research has shown both gross motor skills and physical activity to be related to executive function. However, evidence for these relationships in the preschool years, as well as in low‐ and middle‐income countries is lacking. Therefore, this study aimed to investigate the relationships between components of executive function (inhibition, shifting and working memory) and gross motor skills (locomotor skills and object control skills) in a sample of preschool children from urban and rural low‐income settings in South Africa. Results revealed that inhibition and working memory, but not shifting, were associated with gross motor skills. More specifically: inhibition was associated with both locomotor [β = 0.20, p = 0.047] and object control skills [β = 0.24, p = 0.024], whereas working memory was only associated with locomotor skills [β = 0.21, p = 0.039]. Physical activity was not associated with inhibition and shifting but was negatively associated with working memory. These results elaborate a growing evidence base linking executive function and gross motor skills in the early years, and it is the first to look at specific associations of locomotor and object control skills with executive function in the South African context (a low‐ and middle‐income country).     

Morphological awareness predicts the growth rate of Chinese character reading

In this longitudinal study, we assessed 88 Hong Kong Chinese typically developing kindergarteners' Chinese character reading accuracy four times with 6‐month intervals over 1.5 years with the first testing point in the fall of the second year of kindergarten (K2), during which morphological awareness, phonological awareness, orthographic awareness, visual–spatial relationships, and nonverbal IQ were tested (Time 1). The latent growth curve modeling showed that reading development in Chinese of typically developing kindergarteners followed a cumulative linear trajectory, suggesting that children with higher initial reading ability develop reading ability at a faster rate. Additionally, morphological awareness at K2 positively and uniquely predicted a linear growth pattern of character reading between K2 and K3 over 1.5 years, a period in which formal teaching and learning Chinese takes place in Hong Kong. Contributing to the literature, these findings highlighted the unique significance of morphological awareness in the growth rate of reading: Typically developing children with better early morphological awareness tend to have a higher initial point of reading ability and, more importantly, a faster growth rate, resulting in a wider discrepancy of developmental outcomes between low‐ and high‐ performers. The results suggest that greater attention should be focused on the development of morphological awareness in early readers, given its salient role in Chinese reading development.