Mediation processes are fundamental to many classic and emerging theoretical paradigms
within psychology. Innovative methods continue to be developed to address the diverse …

In the present meta-analysis, we examine how secondary school characteristics–such as
schools' academic press, school climate, material resources, personnel resources …

Objective To examine individual, situational and organisational aspects that influence
psychological impact and recovery of a patient safety incident on physicians, nurses and …

Background Prior studies examining the sleep of adolescents with and without attention‐
deficit/hyperactivity disorder (ADHD) have relied on mean values such as average sleep …

This article reviews the essential ingredients and innovations in the design and analysis of
group-randomized trials. The methods literature for these trials has grown steadily since they …

Purpose To assess the daily concordance between parent and adolescent daily sleep
habits, how that concordance compares to other predictors of sleep, and whether the degree …

Prior studies have shown that self-and manual massage (SMM) increases flexibility in non-
adjacent body areas. It is unclear whether this also influences performance in terms of force …

Researchers in the field of early adolescence interested in quantifying the environmental
influences on a response variable of interest over time would use cluster sampling (ie …

Objective: Individually-randomized psychotherapy trials are often partially nested. For
instance, individuals assigned to a treatment arm may be clustered into therapy groups for …

This article analyses how the classroom context contributes to attitude change in
adolescence. By analysing the relationship that the primary school classroom context has on …