Intimate Partner Multiple Segment Analysis

Research Question 3: Is there a difference in weapon use against female vs. male victims of intimate partner violence?

This example uses NIBRS data to identify intimate partner relationships, the violent offenses committed by intimate partners, and the use of weapons in these offenses.  Prior to the implementation of NIBRS, data were not available at the national level to address this question. NIBRS provides the level of detail about offender-victim relationships and the crime locations that are needed for this analysis.

The data files needed for this multiple segment analysis are from the file saved in the example of Intimate Partner Multiple Segment Analysis - Research Question 1 and the incident-level aggregated flat file produced in Preparing Individual File Segments For Detailed Analysis.  The original data source was the 1999 NIBRS hierarchical data file's victim segment.  This segment was saved as a separate file. 

In the first research question examined in the intimate partner single segment analysis, the incidents involving intimate partners were identified and these incidents were examined again in the first research question in the intimate partner multiple segment analysis.  The merged file saved in the first multiple segment analysis research question contains the variables from the victim segment and the offense segment.   A new variable named IPMSVOFF was created to define groupings of the most serious violent offenses reported by victims where one of the offenders was an intimate partner.   So, only the most serious violent offense is included in the analysis.  For each offense, up to three weapons can be reported.  To answer this research question, categories of weapons are created and the most serious weapon used is identified for use in the analysis.

The method of analysis is a cross-tabulation table comparing, within gender classification, the number and percentage of most serious weapon used against the victim in an intimate partner offense incident.  Most serious weapon used is a grouped variable.  The total number of incidents evaluated for this example is 167,158.   The total number of valid cases for this analysis is 145,248 after excluding missing data on the weapon used variable.

The results show that, within gender classification, female victims in intimate partner violent encounters are most likely (76.7%) to report having a personal weapon used against them and least likely (1.9%) to report having a firearm used against them.  Quite similarly, male victims in intimate partner violent encounters are also most likely (67.5%) to report having a personal weapon used against them and least likely (1.4%) to report having a firearm used against them.

Below is the table produced showing the weapon most often used in intimate partner relationships by gender of victim.

To view the SPSS code showing this process, including narrative text, select this
option:

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