Oculomotor atypicalities in Developmental Coordination Disorder

Children with Developmental Coordination Disorder (DCD) fail to acquire adequate motor skill, yet surprisingly little is known about the oculomotor system in DCD. Successful completion of motor tasks is supported by accurate visual feedback. The purpose of this study was to determine whether any oculomotor differences can distinguish between children with and without a motor impairment. Using eye tracking technology, visual fixation, smooth pursuit, and pro‐ and anti‐saccade performance were assessed in 77 children that formed three groups: children with DCD (aged 7–10), chronologically age (CA) matched peers, and a motor‐match (MM) group (aged 4–7). Pursuit gain and response preparation in the pro‐ and anti‐saccade tasks were comparable across groups. Compared to age controls, children with DCD had deficits in maintaining engagement in the fixation and pursuit tasks, and made more anti‐saccade errors. The two typically developing groups performed similarly, except on the fast speed smooth pursuit and antisaccade tasks, where the CA group outperformed the younger MM group. The findings suggest that children with DCD have problems with saccadic inhibition and maintaining attention on a visual target. Developmental patterns were evident in the typically developing groups, suggesting that the pursuit system and cognitive control develop with age. This study adds to the literature by being the first to systematically identify specific oculomotor differences between children with and without a motor impairment. Further examination of oculomotor control may help to identify underlying processes contributing to DCD. A video abstract of this article can be viewed at: https://youtu.be/NinXa2KlB4M . [Correction added on 27 January 2017, after first online publication: The video abstract link was added.]     

On how to be unpredictable: evidence from the voluntary task-switching paradigm

The voluntary task-switching paradigm requires subjects to select randomly between tasks and promises to provide a window into executive task selection independent of exogenous influences present in standard task-switching situations. We show here that the degree to which subjects perseverate on tasks across trials captures unique individual differences variance, but also that the switch rate is under strong stimulus-driven control: "Voluntary" switches are much more frequent when the stimulus changes than when it repeats. Most important, we show that individuals whose no-switch trials are selectively slowed exhibit less perseveration and stimulus-driven effects (and thus more voluntary selection) than individuals whose no-switch trials do not show this slowing. We suggest that selective slowing indicates a strategy of treating trials as discrete events--possibly through inhibition of the preceding task set. These results not only demonstrate massive nonvoluntary influences on voluntary selection that are largely untapped by standard task-switching measures, but also show how such influences can be counteracted through strategic adaptations.     

Disfluency data of German preschool children who stutter and comparison children

This study compared the disfluencies of German-speaking preschool children who stutter (CWS, N = 24) with those produced by age- and sex-matched comparison children who do not stutter (CWNS, N = 24). In accordance with Yairi and Ambrose's [Yairi, E., & Ambrose, N. (1992). A longitudinal study of stuttering in children: A preliminary report. Journal of Speech and Hearing Research, 35, 755-760] guidelines the CWS group had a narrow age range (2-5 years) and were seen close to the reported time of their stuttering onset (average of 8 months). Furthermore, over 95% of the CWS group had not received any type of speech therapy intervention. Consistent with previous findings for English-speaking preschool children, 'stuttering-like' disfluencies (prolongations, blocks, part- and one-syllable word repetitions) were significantly more frequent in CWS (mean = 9.2%) than in CWNS (mean = 1.2%), whereas no significant group differences occurred with respect to 'normal' disfluencies. The number of iterations in stuttering-like disfluencies was also significantly higher in CWS (mean = 1.28 iterations) than in CWNS (mean = 1.09 iterations). In contrast to previous findings, a sub-group of children who have been stuttering for a shorter time (1-5 months) did not differ from a sub-group who had stuttered for a longer period (8-22 months). EDUCATIONAL OBJECTIVES: The reader will be able to: (1) describe how German-speaking preschool children who stutter and who do not stutter display stuttering-like and normal disfluencies including number of iterations; (2) explain how powerful classification measures for the diagnosis of stuttering are for German-speaking preschool children; (3) discuss how disfluency patterns of native English- and German-speaking children close to onset of stuttering differ.     

Die psychologische Bedeutung magischer Bräuche

Ohne Zusammenfassung     

TOPOLOGICAL AND EUCLIDEAN SPATIAL FEATURES NOTED BY CHILDREN

The question explored in this study is whether the spatial-perceptual difficulties experienced in some cultures could be partly accounted for in terms of a persistence of predominantly topological functioning. An oddity-choice task was devised consisting of one set of regular and another of irregular figures such that responses could be classified as topological (T), Euclidean (E) or “unrelated” (U), the last indicating failure to categorize figures consistently. A total of 415 children aged 4–12 were tested in Hong Kong, India, Scotland and Zambia. Few significant age trends but highly significant cultural and sub-cultural differences were found. Contrary to expectation, T responses were roughly constant while the proportion of both E and U responses showed systematic cross-cultural variations. There was evidence that it is U responses rather than the proportion of E responses which directly reflect spatial ability. The factors producing cultural and sub-cultural differences are discussed.     

The ecumenical commemoration of the 500th anniversary of the Reformation in Western Europe

This article explores why the Lutheran/Roman Catholic commemoration of the Reformation in 2017 is an ecumenical challenge par excellence. In particular it contrasts the context of the 2017 commemoration with that of previous centenaries and goes more deeply into this by analysing the dialectics of centenaries both in general and with respect to this very special centenary. It also describes major changes in the relationship between Protestants and Catholics, presenting other main aspects of the new context in which that commemoration is taking place in 2017, and addressing different aspects of commemoration. It offers an analysis of how the Catholic/Lutheran Commission on Unity overcame the hindrances to a common commemoration and celebration in its document ‘From Conflict to Communion’, opening the way for a twofold commemoration, both in joy and gratitude, and in lament and confession of guilt. The article also focuses on five ecumenical imperatives which this document offers, not only looking back, but also looking forward, committing Catholics and Protestants to continue their way from conflict to communion. It concludes by describing the highly remarkable service of Common Prayer, which took place in Lund Cathedral, with Pope Francis, for which the above document prepared the way and formed the basis. It becomes clear how theological preparation and the Common Prayer in Lund concurred in making possible a historic ecumenical commemoration and celebration of the Reformation.