Early intervention for children with behavioural difficulties can be effective in terms of outcomes for both the children and their families. Early intervention can save a child from long-term outcomes such as school failure, peer rejection and later offending. However, in terms of accurate assessment of young children's behavioural difficulties,…

Taxometric analyses have proven helpful for distinguishing categorical and dimensional data. Many taxometric procedures require at least 3 variables for analysis. What if a construct is defined by only 2 conceptually nonredundant characteristics or a data set contains only 2 empirically nonredundant variables? In Study 1, we performed extensive…

Research on informant discrepancies has increasingly utilized difference scores. This article demonstrates the statistical equivalence of regression models using difference scores (raw or standardized) and regression models using separate scores for each informant to show that interpretations should be consistent with both models. First,…

The Child Behavior Scale (CBS) is a teacher-report instrument that was developed over a decade ago as an alternative to more costly methods for assessing children's behavior and peer relations in school contexts. This investigation was undertaken to clarify how well the CBS achieves its aims with a broader age spectrum of youth (6- to…

The new correlated 8-factor measurement structure of the Child Behavior Checklist for ages 6-18 (CBCL/6-18; T. M. Achenbach & L. A. Rescorla, 2001) derived from an American sample was used as a benchmark to evaluate its generalizability to Turkish general population (N = 5, 195) and clinical (N = 963) samples. Item-level confirmatory factor…

Background: Five DNA markers (single-nucleotide polymorphisms, SNPs) have recently been found to be associated with general cognitive ability "g") in a sample of 7414 7-year-old twins. These children have also been studied at 2, 3, 4, and 7 years of age on measures of cognitive and language development and behaviour problems; family environment…

Background: The behaviour of children raised in institutional care in their early years is typified by heightened levels of inattention and overactivity irrespective of the quality of the care. There is some evidence that this behaviour may be specifically associated with forms of attachment disorder behaviours, but to date studies have been…

Background: Variable- and person-centred analyses were used to examine prediction of middle childhood behaviour problems from earlier child and family measures. Method: A community sample of 164 families, initially recruited at antenatal clinics at two South London practices, was assessed for children's behaviour problems and cognitive ability,…