How Has the Economic Downturn Affected Communities and Implementation of Science‐Based Prevention in the Randomized Trial of Communities That Care?

This study examined implications of the economic downturn that began in December 2007 for the Community Youth Development Study (CYDS), a longitudinal randomized controlled trial of the Communities That Care (CTC) prevention system. The downturn had the potential to affect the internal validity of the CYDS research design and implementation of science-based prevention in study communities. We used archival economic indicators and community key leader reports of economic conditions to assess the extent of the economic downturn in CYDS communities and potential internal validity threats. We also examined whether stronger economic downturn effects were associated with a decline in science-based prevention implementation. Economic indicators suggested the downturn affected CYDS communities to different degrees. We found no evidence of systematic differences in downturn effects in CTC compared to control communities that would threaten internal validity of the randomized trial. The Community Economic Problems scale was a reliable measure of community economic conditions, and it showed criterion validity in relation to several objective economic indicators. CTC coalitions continued to implement science-based prevention to a significantly greater degree than control coalitions 2 years after the downturn began. However, CTC implementation levels declined to some extent as unemployment, the percentage of students qualifying for free lunch, and community economic problems worsened. Control coalition implementation levels were not related to economic conditions before or after the downturn, but mean implementation levels of science-based prevention were also relatively low in both periods.     

Enhancing Initial Parental Engagement in Interventions for Parents of Young Children: A Systematic Review of Experimental Studies

Low rates of participation in parenting interventions may undermine their effectiveness. Although a wide range of strategies to engage parents in interventions are described in the literature, little is known about which engagement strategies are most effective in enhancing parental engagement. This systematic review explores effective engagement strategies to encourage initial parental engagement (recruitment, enrolment, and first attendance) in parenting interventions for parents of children aged 2–8 years old. This review was conducted based on the guidelines of the Cochrane Handbook for Systematic Reviews of Interventions (Higgins and Green 2011) and the Preferred Reporting Items for Systematic Review and Meta-Analysis (Moher et al. 2009). Electronic systematic searches from January 1996 to August 2017 were conducted in PsycINFO, Scopus, ProQuest Social Sciences Journals, CINAHL, and PubMed databases. Eight studies met the inclusion criteria representing 1952 parents from four different countries. Of the engagement strategies tested in included studies (monetary incentive, setting, testimonial, advertisement, and engagement package), three strategies (advertisement, incentive, and engagement package) showed a significant effect on a stage of engagement, but none across stages. The low methodological quality of the selected studies limits their generalisability and thus provides limited evidence regarding effective engagement strategies to increase recruitment, enrolment, and first attendance rates in parenting interventions. There is a need for further, more methodologically rigorous, research evidence regarding how to engage parents more effectively in the early stages of parenting interventions.     

Poststimulation time interval-dependent effects of motor cortex anodal tDCS on reaction-time task performance

Anodal transcranial direct current stimulation (tDCS) induces long-term potentiation-like plasticity, which is associated with long-lasting effects on different cognitive, emotional, and motor performances. Specifically, tDCS applied over the motor cortex is considered to improve reaction time in simple and complex tasks. The timing of tDCS relative to task performance could determine the efficacy of tDCS to modulate performance. The aim of this study was to compare the effects of a single session of anodal tDCS (1.5 mA, for 15 min) applied over the left primary motor cortex (M1) versus sham stimulation on performance of a go/no-go simple reaction-time task carried out at three different time points after tDCS—namely, 0, 30, or 60 min after stimulation. Performance zero min after anodal tDCS was improved during the whole course of the task. Performance 30 min after anodal tDCS was improved only in the last block of the reaction-time task. Performance 60 min after anodal tDCS was not significantly different throughout the entire task. These findings suggest that the motor cortex excitability changes induced by tDCS can improve motor responses, and these effects critically depend on the time interval between stimulation and task performance.