1983 -- 2009
2008 -- 2009
Users should be aware that ICPSR transposed and converted the original Microsoft Excel data provided by the principal investigators to SPSS, SAS, and Stata formats for dissemination purposes. The unmodified Original Bully Data (Part 11) and Original Victim Data (Part 12) are available in Microsoft Excel format. ICPSR also created a tab-delimited version of the original Part 11 and Part 12 data for preservation purposes. Given the structure of the original data files, ICPSR converted the Original Bully Data into four parts and converted the Original Victim Data into five parts. Parts 1-4 represent transposed versions of the Original Bully Data in SPSS, SAS, and Stata formats and Parts 5-9 represent transposed versions of the Original Victim Data in SPSS, SAS, and Stata formats. The PDF codebooks being distributed as part of this data collection contain a table that summarizes the relationship between the original Microsoft Excel Bully and Victim Data files and the corresponding SPSS, SAS, and Stata data parts.
The project's report (Farrington and Ttofi, 2009; NCJ 229377) indicates that 89 reports (describing 53 different program evaluations) concerned with bullying prevention were included in this study. Of the 89 reports, only 44 provided data that permitted the calculation of an effect size for bullying or victimization (Part 10). Similarly, the Bully Data filesets and the Victim Data filesets do not include data on all 89 reports that were eligible for inclusion in the study.
ICPSR did not convert all of the original data in Microsoft Excel format into SPSS, SAS, and Stata files. Users should refer to the codebooks being distributed as part of this data collection for specific cell ranges in the original Excel data that were not converted by ICPSR.
These data were collected as part of a systematic review for the Campbell Crime and Justice Coordinating Group (CCJG). Further information about the Campbell Collaboration and the Campbell Crime and Justice Group can be found at the
Campbell Collaboration Web site.