Criminology is the study of crime and criminals. In criminology, crime data is collected in different ways. All of these are part of the National Incident-Based Reporting System, which is a program that collects data on every criminal incident response (CITATION). There are primary sources of crime data collection and secondary sources of crime data collection. Some of the primary sources for collecting crime data include the National Crime Victimization Survey, self-report surveys, and Uniform Crime Reports. These reporting surveys and official documents collect information for criminologists on all types of crimes. Some examples are homicide, rape, aggravated assault, robbery, arson, burglary, and larceny. Criminologists also use them to measure the nature and extent of crime, as well as the behavior and personality of offenders. Secondary sources of crime data collection are experimental research, observational and interview research, data mining, crime mapping, meta-analysis and systematic review, and research. cohort. These collection techniques gather information...