A Dose of Nature:Two three-level meta-analyses of the beneficial effects of exposure to nature on children's self-regulation

There is growing evidence that exposure to nature, as opposed to a built environment, is associated with better health. Specifically in children, more exposure to nature seems to be associated with better cognitive, affective, and behavioral self-regulation. Because studies are scattered over different scientific disciplines, it is difficult to create a coherent overview of empirical findings. We therefore conducted two meta-analyses on the effect of exposure to nature on self-regulation of schoolchildren (Mage = 7.84 years; SD = 2.46). Our 3-level meta-analyses showed small, but significant positive overall associations of nature with self-regulation in both correlational (15 studies, r = .10; p < .001) and (quasi-) experimental (16 studies, d = .15; p < .01) studies. Moderation analyses revealed no differential associations based on most sample or study characteristics. However, in correlational studies the type of instrument used to measure exposure to nature (index score of nature vs. parent-reported exposure) significantly moderated the association between nature and self-regulation. Stronger associations were found when exposure to nature was assessed via parent-reports than via an index such as by a normalized difference vegetation index (NDVI). Our findings suggest that nature may be a promising tool in stimulating children's self-regulation, and possibly preventing child psychopathology. However, our overview also shows that we are in need of more rigorous experimental studies, using theoretically based conceptualizations of nature, and validated measures of nature and its putative outcomes

Ramping Up Detention of Young Serious Offenders: A Safer Future?

When youth commit serious violent or sexual offenses, this often generates a call for more severe punishments and longer detention sentences. An important question is whether (long) detention sentences are effective in decreasing recidivism among serious young offenders. To estimate recidivism rates in serious young offenders and elucidate the link between sentencing (in terms of custodial vs. non-custodial and length of imprisonment) and recidivism, three multilevel meta-analyses were conducted. With a systematic literature search, 27 studies and four datasets were traced, involving N = 2,308 participants, yielding 90 effect sizes for overall recidivism, 24 for specifically violent recidivism, and 23 for the association between length of imprisonment and recidivism. The average weighted overall recidivism rate was 44.47% (95% confidence interval [CI]: 37.59–51.46%) over an average period of 8.68 years. The rate of violent recidivism was estimated at 30.49% (95% CI: 20.92–40.52%), over an average period of 11.45 years. Recidivism rates were higher when recidivism was defined as an arrest for any new offense rather than for a specific offense and in studies conducted in the United States versus European studies. Violent recidivism rates were higher in studies with longer follow-up periods. Based on the limited available studies, no difference in recidivism rates following custodial and non-custodial sentences were found, nor an association between length of imprisonment and recidivism. To increase rehabilitation chances for youth offenders, further research is warranted to better understand the impact of sentencing and to ascertain what is needed to make custodial and non-custodial sentences more effective

Risk factors for juvenile cybercrime: A meta-analytic review

So far, most meta-analyses and reviews on juvenile crime risk factors focused on risk factors for traditional crimes. It is unknown, though, whether these risk factors are also relevant for the explanation of cybercrime perpetration. This meta-analytic review aimed to identify risk factors for cyberstalking, hacking, and sexting perpetrated by juveniles. A literature search yielded 48 articles (24 for cyberstalking, 15 for sexting, and 10 for hacking) that produced 903 effect sizes (306 for cyberstalking, 61 for sexting, and 536 for hacking). The results showed similarities, but also differences in risk factors for the three types of cybercrime. Overall, peer factors were found to be important for all three types (deviant peers for cyberstalking and hacking and peer pressure for sexting). Besides, for cyberstalking, previous online and offline perpetration and victimization were significant risk factors. Other small but significant effects for multiple cybercrime types were found for dark personality traits (for cyberstalking and sexting) and high computer preoccupation (for cyberstalking and hacking). Implications for (preventive) intervention are discussed, as well as the need for future research

Long-term collateral effects of parent programs on child maltreatment proxies:Can administrative data provide useful insights?

Collecting child maltreatment data from participants is expensive and time-consuming, and often suffers from substantial attrition rates. Administrative population data may prove fruitful to overcome these barriers. The aim of this study was twofold: (1) to illustrate how administrative data may be used in evaluating long-term intervention effects; and (2) to examine collateral effects of three preventive early childhood interventions offered to families in the Netherlands (Supportive Parenting, VoorZorg, and Incredible Years). Using population data, four proxies of child maltreatment were assessed to examine collateral intervention effects: incidences of child protection orders, placements of children in residential care, crime victimization of children or their parents, and parental registrations as a crime suspect. The results revealed no significant differences between experimental and control conditions on any of these proxies, with very small effect sizes (ranging from Cramer's V = 0.01 to Cramer's V = 0.10). We conclude that the results do not provide support for collateral effects, but that studying other outcomes may provide this support. We further discuss that small sample sizes and low prevalences challenge studies using administrative data. Notwithstanding these limitations, we conclude that administrative data can strengthen the evidence base for collateral and direct intervention effects.</p

Components associated with the effect of home visiting programs on child maltreatment: A meta-analytic review

Background: Home visiting programs are widely endorsed for preventing child maltreatment. Yet, knowledge is lacking on what and how individual program components are related to the effectiveness of these programs. Objective: The aim of this meta-analysis was to increase this knowledge by summarizing findings on effects of home visiting programs on child maltreatment and by examining potential moderators of this effect, including a range of program components and delivery techniques. Methods: A literature search yielded 77 studies (N=48,761) examining the effectiveness of home visiting programs, producing 174 effect sizes. In total, 35 different program components and delivery techniques were coded. Results: A small but significant overall effect was found (d=0.135, 95 % CI (0.084, 0.187), p<0.001). Programs that focused on improving parental expectations of the child or parenthood in general (d = 0.308 for programs with this component versus d = 0.112 for programs without this component), programs targeting parental responsiveness or sensitivity to a child's needs (d = 0.238 versus d = 0.064), and programs using video-based feedback (d = 0.397 versus d = 0.124) yielded relatively larger effects. Providing practical and instrumental assistance was ne

Infrasound as a cue for seabird navigation

Seabirds are amongst the most mobile of all animal species and spend large amounts of their lives at sea. They cross vast areas of ocean that appear superficially featureless, and our understanding of the mechanisms that they use for navigation remains incomplete, especially in terms of available cues. In particular, several large-scale navigational tasks, such as homing across thousands of kilometers to breeding sites, are not fully explained by visual, olfactory or magnetic stimuli. Low-frequency inaudible sound, i.e., infrasound, is ubiquitous in the marine environment. The spatio-temporal consistency of some components of the infrasonic wavefield, and the sensitivity of certain bird species to infrasonic stimuli, suggests that infrasound may provide additional cues for seabirds to navigate, but this remains untested. Here, we propose a framework to explore the importance of infrasound for navigation. We present key concepts regarding the physics of infrasound and review the physiological mechanisms through which infrasound may be detected and used. Next, we propose three hypotheses detailing how seabirds could use information provided by different infrasound sources for navigation as an acoustic beacon, landmark, or gradient. Finally, we reflect on strengths and limitations of our proposed hypotheses, and discuss several directions for future work. In particular, we suggest that hypotheses may be best tested by combining conceptual models of navigation with empirical data on seabird movements and in-situ infrasound measurements

Global quieting of high-frequency seismic noise due to COVID-19 pandemic lockdown measures

Human activity causes vibrations that propagate into the ground as high-frequency seismic waves. Measures to mitigate the COVID-19 pandemic caused widespread changes in human activity, leading to a months-long reduction in seismic noise of up to 50%. The 2020 seismic noise quiet period is the longest and most prominent global anthropogenic seismic noise reduction on record. While the reduction is strongest at surface seismometers in populated areas, this seismic quiescence extends for many kilometers radially and hundreds of meters in depth. This provides an opportunity to detect subtle signals from subsurface seismic sources that would have been concealed in noisier times and to benchmark sources of anthropogenic noise. A strong correlation between seismic noise and independent measurements of human mobility suggests that seismology provides an absolute, real-time estimate of population dynamics

The Association between School Corporal Punishment and Child Developmental Outcomes: A Meta-Analytic Review

School corporal punishment (SCP) is still widely used in many countries. Although primary studies have pointed toward detrimental effects of SCP, a quantitative review of these studies was not yet available. To gain better insight into effects of SCP, three meta-analyses were conducted on the association between SCP and children&rsquo;s (1) externalizing behavior, (2) internalizing behavior, and (3) school performance. These meta-analyses synthesized 21 studies (120 effect sizes; N = 67,400), 14 studies (18 effect sizes; N = 39,917), and 20 studies (47 effect sizes; N = 977,367), respectively. Studies were synthesized using a three-level approach to meta-analysis. The results revealed that SCP is positively associated with externalizing behavior (r = 0.27, p &lt; 0.001) and internalizing behavior of children (r = 0.16, p &lt; 0.001), and negatively with children&rsquo;s school performance (r = &minus;0.11, p &lt; 0.001). This review concludes that SCP is a risk factor for externalizing behavior, internalizing behavior, and reduced school performance of children. Other techniques than SCP should be used for class management, and we recommend psychoeducational programs for schools and the wider community in which corporal punishment is still used. These programs should convey the detrimental effects of SCP and alternative discipline techniques. More awareness of the detrimental effects of SCP is needed to make the school environment a safe place for all children across the world

The association between psychopathy and delinquency in juveniles : A three-level meta-analysis

Background Psychopathy has repeatedly been linked with delinquency and criminal recidivism of adults. With the increase of studies examining psychopathic traits in juveniles, it is important to also study this association in juveniles to increase the effectiveness of preventive interventions for juvenile delinquency. PurposeThe primary aim of the present meta-analysis was to examine the association between psychopathic traits and delinquency in juveniles. The second aim was to examine which factors (i.e., type of delinquency, type of psychopathic trait, and other study- and participant characteristics) moderate the association between psychopathy and juvenile delinquent behavior. MethodThe data were analyzed in three-level meta-analytic models.  Results In total, 87 studies were included, which used 74 independent samples and reported on 358 effect sizes. Psychopathy was moderately and positively associated with juvenile delinquency (r = 0.24, p < .0001). This overall association was not influenced by type of delinquency. However, stronger effect sizes were found for impulsivity traits than for callous unemotional traits.  Conclusion Psychopathy in juveniles is associated with current and future offense behavior. Therefore, assessing psychopathy in juveniles is important for strengthening intervention efforts targeting juvenile delinquency