The structure of effortful control in preschoolers and its relation to externalizing problems.

The first aim of the present study was to examine the structure of effortful control. The second aim was to determine whether components of effortful control relate to conduct problems and hyperactivity. Effortful control was measured in 3-year-old children (N= 89) with an observational measure, the effortful control battery (ECB), and a parent report, the Children's Behaviour Questionnaire (CBQ). Principal component analysis showed that the ECB measures five components, assessing two higher-order constructs, which can be labelled as Self-Control and Attention/Motor Control. The five scales of the CBQ appeared to measure one construct - a more general measure of effortful control. The components and constructs of the ECB as well as the scales of the CBQ were differently related to conduct problems and hyperactivity. Conduct problems were most strongly predicted by observed Delay of Gratification and parent-reported Inhibitory Control, whereas Hyperactivity was most strongly predicted by observed Delay of Gratification, and the higher-order construct Attention/Motor Control, as well as parent-reported Attentional Focusing and Inhibitory Control. It is important to keep in mind that effortful control is composed of heterogeneous components, all having their own unique values.