A subset of data from Keiley, Bates, Dodge, and Pettit (2000) measuring changes in externalizing behaviour in a sample of 45 children tracked from first through sixth grade.
Format
A person-period data frame with 270 rows and 5 columns:
- id
- Child ID. 
- time
- Time of measurement. 
- externalizing_behaviour
- Sum of scores on Achenbach's (1991) Child Behavior Checklist. Scores range from 0 to 68 
- female
- Binary indicator for whether the adolescent is a female. 
- grade
- Grade year. 
Source
Keiley, M. K., Bates, J. E., Dodge, K. A., & Pettit, G. S. (2000). A cross-domain growth analysis: Externalizing and internalizing behavior during 8 years of childhood. Journal of Abnormal Child Psychology, 28, 161–179. https://doi.org/10.1023%2Fa%3A1005122814723