National Archive of Criminal Justice Data

This dataset is maintained and distributed by the National Archive of Criminal Justice Data (NACJD), the criminal justice archive within ICPSR. NACJD is primarily sponsored by three agencies within the U.S. Department of Justice: the Bureau of Justice Statistics, the National Institute of Justice, and the Office of Juvenile Justice and Delinquency Prevention.

Moving Forward on Gang Prevention in Los Angeles, California, 2009-2014 (ICPSR 35506)

Principal Investigator(s): Hennigan, Karen, Center for Research on Crime, Psychology Dept, University of Southern California

Summary:

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

Using multiple data time points this study investigated the prospective validity of a secondary gang prevention program called Gang Risk of Entry Factors (GREF) assessment. At Time 1 of the study interview cut-points were established for high and low risk on nine risk factors that were included on the assessment. Those who scored high risk on four or more risk factors were determined eligible for secondary prevention. At time 2 each participate was then classified into one of four levels of gang membership. The goal of this was to investigate how successful the GREF was in identifying the youth (in the absence of a program) who become associated with a street gang in the 12 to 18 months of the study time frame .

Access Notes

  • These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

  • One or more files in this data collection have special restrictions ; consult the restrictions note to learn more. You can apply online for access to the restricted-use data. A login is required to apply.

    Access to these data is restricted. Users interested in obtaining these data must complete a Restricted Data Use Agreement, specify the reason for the request, and obtain IRB approval or notice of exemption for their research.

    Any public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.

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Study Description

Citation

Hennigan, Karen. Moving Forward on Gang Prevention in Los Angeles, California, 2009-2014. ICPSR35506-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2017-06-16. https://doi.org/10.3886/ICPSR35506.v1

Persistent URL: https://doi.org/10.3886/ICPSR35506.v1

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Funding

This study was funded by:

  • United States Department of Justice. Office of Justice Programs. National Institute of Justice (2008-IJ-CX-0016)

Scope of Study

Subject Terms:    adolescents, crime prevention, gang members, gangs, probation, risk assessment, risk factors

Smallest Geographic Unit:    None

Geographic Coverage:    California, Los Angeles

Time Period:   

  • 2011-04--2013-11

Date of Collection:   

  • 2011-04--2013-03 (Time 1)
  • 2012-07--2013-11 (Time 2)

Unit of Observation:    Individual

Universe:    All youth ages 11 to 16 in areas of Los Angeles County, California experiencing high levels of gang crime in 2011.

Data Type(s):    survey data

Data Collection Notes:

These data are part of NACJD's Fast Track Release and are distributed as they were received from the data depositor. The files have been zipped by NACJD for release, but not checked or processed except for the removal of direct identifiers. Users should refer to the accompanying readme file for a brief description of the files available with this collection and consult the investigator(s) if further information is needed.

Methodology

Study Purpose:   

The purpose of the study was to test the prospective validity of the Gang Risk of Entry Factors (GREF) assessment. The study asked 3 primary questions:

  • How successful is the assessment in identifying the youth (in the absence of a program) who become associated with a street gang over a subsequent 12 to 18 months?
  • What percentage of youth identified as high risk for gang-joining actually do join a gang over this time?
  • How many youth identified as low risk join?

Study Design:   

Youth were referred to the study by school probation officers, approached by research staff at a probation office, or referred by a participating youth. Interviewers described the opportunity to the youth and parents. For those who were interested an appointment was set to meet at their home or other suitable location at a convenient time. Only one youth was eligible to participate within a household. Informed consent was obtained from a parent and the participating youth during the house visit prior to each interview. Youth were interviewed at a private, convenient location in or near their home. Overall, 505 youth were invited to participate in the study and 85% (428) agreed to participate at Time 1. A total of 391 follow-up interviews were completed at Time 2.

Sample:    Researchers and probation officers in areas of Los Angeles County that experience high levels of gang crime recruited participates in 3 ways: referred by school probation officers (27%), approached by research staff at a probation office (60%), and referred to the study by a participating youth or his or her parent (13%).

Time Method:    Longitudinal

Weight:    None

Mode of Data Collection:    face-to-face interview, paper and pencil interview (PAPI)

Description of Variables:    Variables at time 1 (Data n=428, 424 variables) and time 2 (Data n=391, 452 variables) pertain to nine risk factors associated with joining a street gang. These risk factors included impulsive risk taking, guilt neutralization, antisocial tendencies, negative peer influence, peer delinquency, parental supervision, family gang influence, critical life events, and early delinquent activities. The created variables data set RISK FACTOR DATA WITH GRP IDENTITY data (Data n=428, 55 variables) includes the variables related to the GREF scoring.

Response Rates:    A total of 505 youth were invited to participate in the study and 85% (428) agreed to participate at Time 1. A total of 391 follow-up interviews were completed at Time 2 (91% of the Time 1 sample).

Presence of Common Scales:    Several Likert type scales were used in this study.

Version(s)

Original ICPSR Release:   2017-06-16

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