Abstract

Background: Previous studies have shown that physical activity interventions positively affect core symptoms and executive functioning in children with attention-deficit/hyperactivity disorder (ADHD). However, comparisons between different physical activity interventions still need to be made. This study is the first to analyze the effects of 10 different types of physical activity on children with ADHD through a network meta-analysis.

Methods: PubMed, Embase, Web of Science, and Cochrane Library databases were searched for randomized controlled trials on the effects of physical activity interventions on children with ADHD. The search time frame was from database creation to October 2022. Two investigators independently performed literature screening, extraction, and quality assessment. Network meta-analysis was performed with Stata 15.1.

Results: A total of 31 studies were included, and the results indicated that perceptual-motor training was the most effective in terms of motor ability and working memory (SUCRA = 82.7 and 73.3%, respectively). For attention problems and cognitive flexibility, aquatic exercise was the most effective (SUCRA = 80.9 and 86.6%, respectively). For social problems, horsemanship was the most effective (SUCRA = 79.4%). For inhibition switching, cognitive-motor training was the most effective (SUCRA = 83.5%).

Conclusion: Our study revealed that aquatic exercise and perceptual-motor training had a superior overall performance. However, the effects of various physical activity interventions on different indicators in children with ADHD can vary depending on the individual and the intervention’s validity. To ensure an appropriate physical activity intervention is selected, it is important to assess the severity of symptoms exhibited by children with ADHD beforehand.

Original study:

https://onlinelibrary.wiley.com/doi/full/10.1111/pops.12886

Abstract

Populism and beliefs in conspiracy theories fuel societal division as both rely on a Manichean us-versus-them, good-versus-evil narrative. However, whether both constructs have the same dispositional roots is essentially unknown. Across three studies conducted in two different countries and using diverse samples (total N = 1,888), we show that populism and conspiracy mentality have a strong common core as evidenced using bifactor modeling. This common core was uniquely linked to (aversive) personality, namely the Dark Factor of Personality (D), beyond basic personality traits from the HEXACO Model of Personality Structure. The association between D and the common core, in turn, was fully accounted for by distrust-related beliefs as captured in cynicism, dangerous and competitive social worldviews, sensitivity to befallen injustice, and (low) trust propensity. Taken together, the results show that populism and conspiracy mentality have a shared psychological basis that is well described as a sociopolitically flavored manifestation of generalized dispositional distrust. The findings thus underscore the value of generalized trust for societal functioning and suggest that increasing trust may simultaneously combat both populism and beliefs in conspiracy theories.