Increasing ethnic minority participation in substance abuse clinical trials: lessons learned in the National Institute on Drug Abuse's Clinical Trials Network

Underrepresentation in clinical trials limits the extent to which ethnic minorities benefit from advances in substance abuse treatment. The objective of this article is to share the knowledge gained within the Clinical Trials Network (CTN) of the National Institute on Drug Abuse and other research on recruiting and retaining ethnic minorities into substance abuse clinical trials. The article includes a discussion of two broad areas for improving inclusion-community involvement and cultural adaptation. CTN case studies are included to illustrate three promising strategies for improving ethnic minority inclusion: respondent-driven sampling, community-based participatory research, and the cultural adaptation of the recruitment and retention procedures. The article concludes with two sections describing a number of methodological concerns in the current research base and our proposed research agenda for improving ethnic minority inclusion that builds on the CTN experience.     

Questionnaire of executive function for dancers: an ecological approach

There is a current debate about the ecological validity of executive function (EF) tests. Consistent with the verisimilitude approach, this research proposes the ballet executive scale (BES), a self-rating questionnaire that assimilates idiosyncratic executive behaviors of classical dance community. The BES was administrated to 149 adolescents, students of the Cuban Ballet School. Results present a Cronbach's alpha coefficient of .80 and a split-half Spearman-Brown coefficient r (SB) = .81. An exploratory factor analysis describes a bifactorial pattern of EF dimensions, with a self-regulation component, which explains more than 40% of variance, and a Developmental component, which accounts for more than 20% of variance. The questionnaire's total scores fit linear regression models with two external criteria of academic records, confirming concurrent validity. These findings support the hypothesis that the internalization of specific contextual cultural meanings has a mediating influence in the development of EF.     

Prospective association of parental and child internalizing symptoms: Mediation of parenting practices and irritability

Maternal internalizing symptoms have been linked with child internalizing symptoms, but paternal internalizing difficulties have received little attention. Our aims were to prospectively analyse the simultaneous effect of maternal and paternal internalizing symptoms on child internalizing difficulties, examining gender differences, and to verify the mediating effect of parenting practices and child irritability. The sample included 470 families assessed at child ages 3, 6, 8, and 11. Multi-group structural equation modelling was performed with Mplus8.2. Complete equivalence was found between boys and girls for all paths. Maternal internalizing symptoms at age 3 had an indirect effect on child internalizing symptoms at age 11, via irritability at age 8. Paternal internalizing symptoms at age 3 were not associated with any of the variables under study. Maternal internalizing symptoms and child irritability are targets for intervention in order to prevent child internalizing difficulties.     

Power Dynamics and Organisational Change: An Introduction

Cet article propose un cadre conceptuel pour appréhender les dynamiques de pouvoir lors de changements organisationnels. Weick et Quinn (1999) établissent une distinction entre le changement épisodique, discontinu et intermittent, et le changement continu, évolutif et progressif. Après avoir discuté cette distinction, nous analysons comment les processus de l'influence et du pouvoir social peuvent constituer la base du changement continu. Les bases du pouvoir des agents du changement sont ensuite décrites. Puis nous portons notre attention sur les relations de pouvoir dynamiques entre les agents du changement et les cibles, ainsi que sur les processus sociaux qui facilitent le changement continu. L'article se termine par un survol des contributions à cette édition spéciale.
This article offers a framework for understanding power dynamics in organisational change. Weick and Quinn (1999) make a distinction between change that is episodic, discontinuous, and intermittent, and change that is continuous, evolving, and incremental. After discussing this distinction, we analyse how processes of social power and influence can form the basis for continuous change. Subsequently, the power bases of change agents are described. Then we pay attention to the dynamic power relationships between change agents and targets as well as to the social processes that facilitate continuous change. The article ends with an overview of the contributions to this special issue.