Developmental dyslexia and widespread activation across the cerebellar hemispheres

Developmental dyslexia is the most common learning disability in school-aged children with an estimated incidence of five to ten percent. The cause and pathophysiological substrate of this developmental disorder is unclear. Recently, a possible involvement of the cerebellum in the pathogenesis of dyslexia has been postulated. In this study, 15 dyslexic children and 7 age-matched control subjects were investigated by means of functional neuroimaging (fMRI) using a noun-verb association paradigm. Comparison of activation patterns between dyslexic and control subjects revealed distinct and significant differences in cerebral and cerebellar activation. Control subjects showed bilaterally well-defined and focal activation patterns in the frontal and parietal lobes and the posterior regions of the cerebellar hemispheres. The dyslexic children, however, presented widespread and diffuse activations on the cerebral and cerebellar level. Cerebral activations were found in frontal, parietal, temporal and occipital regions. Activations in the cerebellum were found predominantly in the cerebellar cortex, including Crus I, Crus II, hemispheric lobule VI, VII and vermal lobules I, II, III, IV and VII. This preliminary study is the first to reveal a significant difference in cerebellar functioning between dyslexic children and controls during a semantic association task. As a result, we propose a new hypothesis regarding the pathophysiological mechanisms of developmental dyslexia. Given the sites of activation in the cerebellum in the dyslexic group, a defect of the intra-cerebellar distribution of activity is suspected, suggesting a disorder of the processing or transfer of information within the cerebellar cortex.     

Learning a foreign language: Effects of tact and listener instruction on the emergence of bidirectional intraverbals

We evaluated the effects of tact and listener instruction on the emergence of bidirectional intraverbal relations with 6 typically developing Brazilian children, using an adapted alternating treatment design with pretest and posttest probes. In listener instruction, participants selected pictures that corresponded to spoken foreign-language words. For tact instruction, children had to vocalize foreign words in the presence of the corresponding pictures. After meeting mastery criteria, bidirectional intraverbal tests assessed vocalizations in Portuguese (native language) following the presentation of the equivalent words in English (foreign language) and vice versa. Tact instruction consistently produced higher levels of emergent intraverbal responding compared to listener instruction, confirming results from previous studies.     

Depressive symptoms and unmitigated communion in support providers

In this research, we argue and demonstrate that the association between enacted (un)supportive behaviour and depressive symptoms is a function of the providers' levels of unmitigated communion (UC). UC is characterized by overinvolvement in others' problems, self‐neglect and externalized self‐evaluation. These characteristics appear to predispose individuals high in UC to experience depressive symptoms. As anticipated, we show that enacted supportive behaviour was negatively associated with depressive symptoms (Study 1 and 2), and enacted unsupportive behaviour was positively associated with depressive symptoms (Study 2), but only among individuals low in UC. Our findings are consistent with the idea that for high UC individuals, enacting supportive behaviour, or not enacting unsupportive behaviour, is insufficient to reduce their high levels of depressive symptoms. Copyright © 2009 John Wiley & Sons, Ltd.     

Rhythmic context modulates foreperiod effects

Two experiments examined hypotheses about the roles of probabilistic uncertainty and rhythmic context on attentional preparation as reflected by choice response times (RTs) to the final tone of auditory sequences. Nonisochronous sequences with tone timings either arranged metrically or scrambled were linked with one of three different sequence-final time intervals, or foreperiods (FPs), which varied randomly from trial to trial. Two primary results emerged. First, RTs were faster to target tones ending metrical rhythms than to targets ending scrambled rhythms. Second, metrical contexts elicited RTs that increased with FP duration, whereas scrambled contexts elicited RTs that often decreased with FP duration, despite equivalent variability of time intervals in metrical and scrambled contexts. The results suggest that time relations implied by metrical rhythms systematically modulate preparatory responses to sequence-final FPs.     

The Associations between Ethical Organizational Culture,Burnout, and Engagement: A Multilevel Study

Purpose

Ethical culture is a specific form of organizational culture (including values and systems that can promote ethical behavior), and as such a socially constructed phenomenon. However, no previous studies have investigated the degree to which employees’ perceptions of their organization’s ethical culture are shared within work units (departments), which was the first aim of this study. In addition, we studied the associations between ethical culture and occupational well-being (i.e., burnout and work engagement) at both the individual and work-unit levels.

Design/Methodology/Approach

The questionnaire data were gathered from 2,146 respondents with various occupations in 245 different work units in one public sector organization. Ethical organizational culture was measured with the corporate ethical virtues scale, including eight sub-dimensions.

Findings

Multilevel structural equation modeling showed that 12–27 % of the total variance regarding the dimensions of ethical culture was explained by departmental homogeneity (shared experiences). At both the within and between levels, higher perceptions of ethical culture associated with lower burnout and higher work engagement.

Implications

The results suggest that organizations should support ethical practices at the work-unit level, to enhance work engagement, and should also pay special attention to work units with a low ethical culture because these work environments can expose employees to burnout.

Originality/Value

This is one of the first studies to find evidence of an association between shared experiences of ethical culture and collective feelings of both burnout and work engagement.

     

Shades of Sexualization: When Sexualization Becomes Sexual Objectification

Sexualization in mass media is a widespread phenomenon. Although sexualization and sexual objectification are often used as synonymous, they are two different concepts. Across two studies, we investigated how sexualization affects perceptions of women (Study 1) and men (Study 2) as sexual objects. Participants were asked to judge sexual objectification, competence, and sexiness of female and male models portrayed with different degrees of sexualization, namely, as Non-Revealing (dressed), merely Revealing (undressed), and Sexualized Revealing (undressed and provocative). The results of both studies showed that as the level of sexualization increased so did participants’ perceptions of the targets as sexual objects. However, the level of sexualization affected perceived competence and sexiness differently depending on the target’s gender. Male models’ competence decreased as the level of sexualization increased, whereas female models portrayed as merely Revealing and as Sexualized Revealing were judged as equally incompetent. Male targets’ sexiness was not affected by the level of portrayals’ sexualization, whereas Sexualized Revealing portrayals enhanced the perceived sexiness of female targets. Finally, in Study 2, the results showed that male targets in Sexualized Revealing portrayals were judged as less masculine. Our findings suggest that sexualization contributes similarly to the perception of both women and men as sexual objects but affects other variables depending on the target’s gender. Our work extends previous literature and informs us about the consequences that sexualization of men and women have on others’ judgments.     

TEMPERAMENTAL ADAPTABILITY,PERSISTENCE, AND REGULARITY: PARENTAL RATINGS OF NORWEGIAN INFANTS AGED 6 TO 12 MONTHS,WITH SOME IMPLICATIONS FOR PREVENTIVE PRACTICE

There is a need for standardized measures of infant temperament to strengthen current practices in prevention and early intervention. The present study provides Norwegian data on the Cameron‐Rice Infant Temperament Questionnaire (CRITQ; J.R. Cameron & D.C. Rice, 1986a), which comprises 46 items and is used within a U.S. health maintenance organization. The CRITQ was filled out by mothers and fathers at 6 and again at 12 months as part of a longitudinal study of mental health during the first years of life (the “Little in Norway” study, N = 1,041 families enrolled; V. Moe & L. Smith, 2010). Results showed that internal consistencies were comparable with U.S. data. The temperament dimensions of persistence, adaptability, and regularity had acceptable or close‐to‐acceptable reliabilities in the U.S. study as well as in this study, and also were unifactorial in confirmatory factor analysis. These dimensions are the focus in this article. Findings concerning parents’ differential ratings of their infants on the three dimensions are reported, as is the stability of parents’ ratings of temperament from 6 to 12 months. In addition, results on the relation between temperament and parenting stress are presented. The study suggests that temperamental adaptability, persistence, and regularity may be relevant when assessing infant behavior, and may be applied in systematic prevention trials for families with infants. The inclusion of concepts related to individual differences in response tendencies and regulatory efforts may broaden the understanding of parent—infant transactions, and thus enrich prevention and sensitizing interventions with the aim of assisting infants’ development.     

Task switching and shifting between stopping and going: Developmental change in between-trial control adjustments

This study set out to investigate developmental differences in the ability to switch between choice tasks and to shift between Go/NoGo and choice tasks. Three age groups (7-year-olds, 11-year-olds, and young adults) were asked to consider the shape or color of a bivalued target stimulus. The participants performed a switch task in which a cue signaled the task to be performed (i.e., respond to shape vs. respond to color) and a shift task in which a cue instructed them to make a choice reaction to the shape of the stimulus or to respond (Go) versus inhibit (NoGo) to the color of the stimulus. The ability to switch was examined by considering choice-choice switches versus choice-choice repeats. The ability to shift was examined by considering NoGo-to-choice shifts versus choice-choice repeats and NoGo-to-Go shifts versus Go-Go repeats. The results showed that responding on Go trials was delayed following response inhibition on a NoGo trial. This delay did not discriminate between age groups. Responding on choice trials was considerably slowed when following response inhibition on NoGo trials. This slowing decreased with advancing age. Finally, responses on switch trials were slower compared with repeat trials, and this slowing was disproportionately large in young children compared with the other two age groups. This pattern of findings was interpreted in terms of a generic mechanism involving between-trial control adjustments in the setting of response thresholds that are likely to be mediated by a complex neural network implicating the dorsolateral prefrontal cortex and the presupplementary motor cortex.     

Parent–teacher agreement on 7‐Year‐old children's personality

Agreement between multiple informants on child personality has received limited attention. Focusing on factor structure, gender differences and the influence of socially desirable responding (SDR), we compared parent and teacher Big Five personality ratings of around 600 7‐year olds. Although parent ratings were more desirable than teacher ratings, differential agreement was generally similar to that found for adults, and especially high for ratings of boys. The more evaluative the personality item, the larger the mean‐level difference between parents and teachers on that item. However, undesirable items showed the highest levels of differential agreement. In parent ratings, the two poles of Agreeableness formed separate factors. To view Pro‐sociality as independent of Antagonism could enable parents to view their child more positively. Copyright © 2010 John Wiley & Sons, Ltd.     

Ethical Dilemmas in Genetic Testing: Examples from the Cuban Program for Predictive Diagnosis of Hereditary Ataxias

Predictive testing protocols are intended to help patients affected with hereditary conditions understand their condition and make informed reproductive choices. However, predictive protocols may expose clinicians and patients to ethical dilemmas that interfere with genetic counseling and the decision making process. This paper describes ethical dilemmas in a series of five cases involving predictive testing for hereditary ataxias in Cuba. The examples herein present evidence of the deeply controversial situations faced by both individuals at risk and professionals in charge of these predictive studies, suggesting a need for expanded guidelines to address such complexities.