TY  - JOUR
PY  - 2008//
TI  - Observation of early childhood physical aggression: a psychometric study of the system for coding early physical aggression
JO  - Aggressive behavior
A1  - Mesman, Judi
A1  - Alink, Lenneke R. A.
A1  - van Zeijl, Jantien
A1  - Stolk, Mirjam N.
A1  - Bakermans-Kranenburg, Marian J.
A1  - van Ijzendoorn, Marinus H.
A1  - Juffer, Femmie
A1  - Koot, Hans M.
SP  - 539
EP  - 552
VL  - 34
IS  - 5
N2  - 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>
LA  - en
SN  - 0096-140X
UR  - http://dx.doi.org/10.1002/ab.20267
ID  - ref1
ER  -