@article{ref1,
title="Observation of early childhood physical aggression: a psychometric study of the system for coding early physical aggression",
journal="Aggressive behavior",
year="2008",
author="Mesman, Judi and Alink, Lenneke R. A. and van Zeijl, Jantien and Stolk, Mirjam N. and Bakermans-Kranenburg, Marian J. and van Ijzendoorn, Marinus H. and Juffer, Femmie and Koot, Hans M.",
volume="34",
number="5",
pages="539-552",
abstract="We investigated the reliability and (convergent and discriminant) validity of an observational measure of physical aggression in toddlers and preschoolers, originally developed by Keenan and Shaw [1994]. The observation instrument is based on a developmental definition of aggression. Physical aggression was observed twice in a laboratory setting, the first time when children were 1-3 years old, and again 1 year later. Observed physical aggression was significantly related to concurrent mother-rated physical aggression for 2- to 4-year-olds, but not to maternal ratings of nonaggressive externalizing problems, indicating the measure's discriminant validity. However, we did not find significant 1-year stability of observed physical aggression in any of the age groups, whereas mother-rated physical aggression was significantly stable for all ages. The observational measure shows promise, but may have assessed state rather than trait aggression in our study.<p /> <p>Language: en</p>",
language="en",
issn="0096-140X",
doi="10.1002/ab.20267",
url="http://dx.doi.org/10.1002/ab.20267"
}