Bullying before and during the COVID-19 pandemic.

The rates of bullying during the COVID-19 pandemic, a time of unprecedented public health and social restrictions, were compared to earlier times when students attended school in person. Several studies indicated a notable decrease in the prevalence of bullying victimization and perpetration during the pandemic, particularly when online learning was implemented. But studies from countries with fewer social restrictions indicated increases in rates of bullying during the pandemic.

Experiences of racial microaggression among immigrant and Canadian-born young adults: Effects of double stigma on mental health and service use.

Background: Significant disparities in utilization of mental health services exist among immigrant and Canadian-born populations. These gaps may be associated with a 'double stigma' - stigma related to being from a racialized background exacerbated by mental health stigma. Immigrant young adults may be particularly susceptible to this phenomenon, given developmental and social transitions from adolescence to adulthood.

Bullying involvement and the transition to high school: A brief report.

School transitions are common educational experiences for children and adolescents and many of them worry about being bullied during this type of major life-changing point. In a sample of 701 Canadians assessed yearly from grade 5 (age 10) to grade 12 (age 18), we examined heterogeneous patterns of bullying involvement while statistically accounting for the transition into high school. Gender differences were also examined.

Loneliness and Well-Being in Children and Adolescents during the COVID-19 Pandemic: A Systematic Review.

Concerns have been raised about the loneliness and well-being of children and adolescents during the COVID-19 pandemic. The extent to which the ongoing pandemic has impacted loneliness and the association between loneliness and well-being is unclear. Therefore, a systematic review of empirical studies on the COVID-19 pandemic was conducted to examine the (1) prevalence of loneliness in children and adolescents, (2) associations between loneliness and indicators of well-being, and (3) moderators of these associations.

Resilience in the Face of Adversity: Family Processes and the Immigrant Paradox in Youth Externalizing Problems.

Background: Despite increased exposure to social adversity, immigrant youth have fewer externalizing problems compared to non-immigrants. Explanations for this apparent advantage remain unclear. This study examined the extent to which socio-economic characteristics and family processes account for group differences in externalizing problems between immigrant and non-immigrant youth.

Cancer-related cognitive impairment in breast cancer survivors: An examination of conceptual and statistical cognitive domains using principal component analysis.

There is a great deal of variability in the composition of neuropsychological test batteries used in the assessment of cancerrelated cognitive impairment (CRCI). Not only the development of a gold standard approach for CRCI assessment would allow for easier identification of women suffering from CRCI but it would also promote optimal care for survivors. As a first step towards the development of a valid and reliable unified test battery, the objective of this study was to verify whether the theoretical domains commonly used in CRCI assessment are statistically supported, before and after breast cancer treatment.

Ethnic Group Differences in Bullying Perpetration: A Meta-Analysis.

We examined ethnic differences in bullying perpetration in order to assess whether ethnic group membership was associated with higher involvement among (1) nonimmigrant and immigrant youth; and (2) White and visible minority youth (i.e., Black, Hispanic, Asian, Indigenous, and Biracial).

Research Review: Test-retest reliability of standardized diagnostic interviews to assess child and adolescent psychiatric disorders: a systematic review and meta-analysis.

Background: A better understanding of factors contributing to the observed variability in estimates of test-retest reliability in published studies on standardized diagnostic interviews (SDI) is needed. The objectives of this systematic review and meta-analysis were to estimate the pooled test-retest reliability for parent and youth assessments of seven common disorders, and to examine sources of between-study heterogeneity in reliability.

Methods: Following a systematic review of the literature, multilevel random effects meta-analyses were used to analyse 202 reliability estimates (Cohen's kappa = ҡ) from 31 eligible studies and 5,369 assessments of 3,344 children and youth.

Bullying among immigrant and non-immigrant early adolescents: School- and student-level effects.

We examined the association between school immigrant concentration and bullying among immigrant and non-immigrant early adolescents, and identified potential explanatory factors. First generation immigrant students had reduced odds of victimization and perpetration in schools with high (20-60%), compared to low, levels of immigrant concentration. Second generation immigrant students had reduced odds of ethnic/racial victimization in moderately concentrated schools; while non-immigrants had increased odds in the same schools.

Meta-analytic results of ethnic group differences in peer victimization.

Research on the prevalence of peer victimization across ethnicities indicates that no one group is consistently at higher risk. In the present two meta-analyses representing 692,548 children and adolescents (age 6-18 years), we examined ethnic group differences in peer victimization at school by including studies with (a) ethnic majority-minority group comparisons (k = 24), and (b) White and Black, Hispanic, Asian, and Aboriginal comparisons (k = 81). Methodological moderating effects (measure type, definition of bullying, publication type and year, age, and country) were examined in both analyses.