Anticipatory postural adjustments during a Fitts’ task: Comparing young versus older adults and the effects of different foci of attention

Anticipatory postural adjustments (APAs) are an integral part of standing balance. Previous research with balance control has shown that adopting an external focus of attention, compared to an internal focus of attention, yields better performance during motor skills. Despite the importance of APAs, especially among older adults, and the potential benefits of adopting an external focus of attention, studies investigating methods for improving APAs are limited. The aim of this study was to compare behavioral, kinematic and APAs measures while adopting different foci of attention among young and older adults when performing a lower extremity Fitts’ task. Ten young adults (mean age 24 years ± 4.37) and ten older adults (mean age 75 years ± 5.85) performed a lower-extremity reaching task (Fitts’ task) while adopting an external focus (focus on target) and an internal focus (focus on limb) in a within-subject design. A motion capture system was used to record participants’ movement data. Custom software derived movement time (MT), peak velocity (PV), time to peak velocity (ttPV) and variability at target (SD_T). Electromyography (EMG) was used to determine APAs onset and magnitude. The findings showed that an external focus of attention led to significantly shorter MT, higher PV, shorter ttPV and more accuracy when reaching the target (SD_T) for both age groups. Also, EMG results showed that, with an external focus, APAs onset occurred earlier and APAs magnitude was more efficient. As predicted by Fitts’ Law, participants spent more time executing movements to targets with higher indices of difficulty. Older adults compared to young adults were more adversely affected by the increase of difficulty of the Fitts’ task, specifically, on measures of APAs. In conclusion, adopting an external focus of attention led to better overall movement performance when performing a lower extremity Fitts’ task. The task used in the present study can distinguish between APAs for older and young adults. We recommend that future studies expand on our findings in order to establish a performance-based objective measure of APAs to assess clinical interventions for postural control impairment.     

Effects of children’s hearing loss on the synchrony between parents’ object naming and children’s attention

Children’s attentional state during parent-child interactions is important for word learning. The current study examines the real-time attentional patterns of toddlers with and without hearing loss (N = 15, age range: 12–37 months) in parent-child interactions. High-density gaze data recorded from head-mounted eye-trackers were used to investigate the synchrony between parents’ naming of novel objects and children’s sustained attention on the named objects in joint play. Results show that the sheer quantities of parents’ naming and children’s sustained attention episodes were comparable in children with hearing loss and their peers with normal hearing. However, parents’ naming and children’s sustained attention episodes were less synchronized in the hearing loss group compared to children with normal hearing. Possible implications are discussed.     

Postural control,falls and Parkinson’s disease: Are fallers more asymmetric than non-fallers?

Postural control asymmetry is an important aspect of Parkinson’s disease (PD) that may be associated with falls. The aim of this study was to compare the postural control asymmetry during postural tasks between fallers and non-fallers in people with PD and neurological healthy age-matched controls (CG). Individuals with idiopathic PD (n = 24) and CG (n = 24) were sub-divided into groups of fallers and non-fallers based on their fall history over the past year. Participants performed blocks of three 30-s trials of quiet standing with feet in a side-by-side and semi-tandem stance position. The center of pressure parameters for each limb were measured and used to calculate the symmetry index. Fallers compared to non-fallers had decreased asymmetry of vertical force in the side-by-side condition. During the tandem-front leg condition, PD non-fallers increased asymmetry of the medial-lateral velocity of sway compared to CG non-fallers. In addition, for the tandem–back leg condition, PD non-fallers increased asymmetry of total displacement and medial-lateral root mean square and mean velocity of sway compared to PD fallers. The results of the study did not support the hypothesis that PD fallers are more asymmetric than PD non-fallers. On the contrary, our results indicated that PD non-fallers had higher postural control asymmetry, especially during the more challenging (semi-tandem standing) postural task.     

Toxic Environment of war: Maternal prenatal heavy metal load predicts infant emotional development

BackgroundPeople in war zones are exposed to heavy metal contamination deriving from new-generation weapons, in addition to exposure to psychologically traumatizing war events. Pregnant women and their children-to-be are particularly vulnerable to both biological and psychological war effects.ObjectiveThe aim of the current study was to analyse the impact of maternal prenatal heavy metal contamination on infant emotional development and to examine the potential moderating role of maternal symptoms of post-traumatic stress disorder (PTSD) in the association between heavy metal load and infant emotional development.MethodsThe participants were 502 Palestinian mothers, pregnant in their first trimester during the 2014 War on Gaza. The mothers were recruited at their delivery (T1) and followed at the infants’ age of 6–7 months (T2; N = 392). The load of five weapon-related heavy metals (chromium, mercury, vanadium, strontium, and uranium) was analysed by Inductively Coupled Plasma Mass Spectrometry (ICP/MS) from mothers’ hair samples at childbirth (T1). Assessment of maternal PTSD symptoms was based on the Harvard Trauma Questionnaire (HTQ) and infant emotional development on the Infant Behavior Questionnaire (IBQ), both reported by mothers (T2).ResultsTwo of the analysed metals, chromium and uranium, adversely predicted children’s early emotional development, indicated by decreased positive affectivity, increased negative emotionality, and problems in early orientation and regulation. Mother’s PTSD did not moderate the impact of heavy metal contamination on children’s emotional development.ConclusionsAdverse impact of war is not limited to those who experience it directly, but is passed on to future generations through multiple mechanisms. International organizations are obliged to protect parents and infants from the modern weaponry in wars.     

On the difficulty interpreting He Yan’s ‘emotionless sage’

This paper examines the debate surrounding He Shao’s account that ‘He Yan thinks the sage is without pleasure, anger, sorrow and grief.’ The point of controversy surrounds squaring a perspective on the sage as emotionless with a thinker who otherwise largely expounds values and political views found in the Lunyu and the Laozi. Since proper management of emotions is important in both texts, it is difficult to imagine how He Yan could hold such a radical view. Dealing with this difficulty scholars have either simply found He Yan ‘unreasonable’ and ‘contradictory’ or otherwise sought to explain away his emotionless sage through complex ontological or political arguments. When He Yan’s work is contextualized in terms of philosophical religious views at the time, we find additional problems with how He Yan’s work has been interpreted. This paper considers a new way to view He Yan, one that respects his multifarious views.     

Can emotional bonding be a liability? Status striving as an intervening mechanism in affective commitment and negative work behaviors relationship

IntroductionThe dark side of affective commitment has been ignored in the past literature on organizational commitment.ObjectivesUsing the tenants of moral self-licensing theory, we examined how affective commitment can cause negative outcomes. We hypothesized that affective commitment leads to unethical pro-organizational behaviors, careerism and counter-productive work behaviors through increased urge for status striving.Methods and resultsA multi-wave and two-source data was obtained (n = 306) from employees and their peers working in the service sector of Pakistan. Employing structural equation modelling (SEM) analysis our results indicate that high levels of affective commitment might unleash status striving which further creates unethical pro-organizational behaviors, careerism and CWBs.ConclusionThe current study opens up a new side in the affective commitment literature by examining status striving as an underlying mechanism through which affective commitment reveals its deleterious consequences for employees.     

Jeux de hasard et d’argent en ligne : quelles spécificités en matière de réduction des risques ?

Initially conceived as an alternative to abstinence-based approaches, the initial goal of harm-reduction was to reduce the health consequences of drug use. Applied to all addictive behaviors (with or without use), it aims to reduce the individual and social problems generated by addiction without condemning the behavior. Harm-minimisation remained very poor in the gambling field. However, the legalization of online gambling in France and their specific characteristics, update the need to develop this field, which is still a new and relatively uncommon part of harm-reduction. The aim of this article is to draw up an inventory of existing knowledge, whether it has been tested empirically or not, in an ecological environment or in a laboratory situation, as regards tools allowing the player to remain in control of his gambling behavior. A reflection on future research and other possible tools is envisaged.     

Assessing the Impact of a Paid Children,Youth, or Family Worker on Anglican Congregations in England

Drawing on the survey conducted by Christian Research and commissioned by the Youthscape Centre for Research and One Hope, this study examined the impact of a paid children, youth, or family worker on the weekly attendance of 5- to 18-year-old children within 786 Church of England churches with adult attendance ranging from 20 to 250 people. Nearly one-third of these churches had a paid children, youth, or family worker (N?=?259). The data demonstrated that on average the presence of a paid children, youth, or family worker added seven young people between the ages of 5 and 18 years to the total weekly Sunday attendance, after controlling for the weekly adult attendance figures.     

The effect of presentation format and encoding strategy on associative memory distortion

IntroductionPrevious studies using semantically related words revealed more accurate memory when the items were encoded visually rather than auditorily and when mental images were created during encoding. However, how the level of memory distortion is affected by the creation of different mental imagery formats or by techniques that should suppress generation of mental images has rarely been investigated.ObjectiveThe aim of the present studies was to investigate the ways in which the encoding strategy affects the accuracy of memory reports for two presentation formats of semantically related words: verbal and pictorial.MethodIn experiment 1, the participants were asked to memorize either pictures or their verbal equivalents (words) from the same category, using one of two encoding strategies: uttering the words or counting backwards. In experiment 2, pictorially or auditory presented material was encoded together with the creation of either visual or auditory mental images of the items. The results of the experimental groups were compared to control groups that received no specific instruction.ResultsHigher levels of false recognition, together with lower rates of correct recognition, were observed for words, presented either visually or auditory, relative to pictures. Moreover, self-generation of additional code during the processing of information favored the reduction of false recognitions.ConclusionEncoding strategies that engaged dual coding reduced false recognition. The results are discussed within the distinctiveness heuristic phenomenon.     

Les limites de l’approche fondée sur le risque de la loi du 5 mars 2012 relative aux recherches impliquant la personne humaine,dite « loi Jardé »: Lecture critique des arrêtés du 12 avril 2018

Thanks to the publication of the two decrees of 12 April 2018, and six years after the promulgation of the Jardé law, the scope of the law of 5 March 2012 as well as the different categories of research involving the human person finally appear clearly. Beside interventional research that includes intervention on the person that is not justified by usual care, the contours of two categories of research have been precised: interventional research with minimal risk and minimal burden and “non-interventional” research, whose name is questionable. If the latest decrees have managed to reach a more coherent set of rules, the French legal and regulatory provisions remain complex and incomplete. Complex, in view of the multiplicity of statutory texts adopted since the promulgation of the Jardé law. Incomplete, because the needs for ethical evaluation provided for by the international ethical principles of research are not systematically covered by French law.