Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
Lecture Notes
Chapter 2: Measuring Crime
Learning Objectives
2.2 Distinguish key features and some of the major limitations associated with the National
Crime Victimization Survey.
2.4 Identify different types of self-report surveys.
2.5 Describe additional data-collection methods used for more specific purposes or specific
populations.
Chapter Outline
I. Introduction
i. Undetected, or unreported, crimes are referred to as the dark figure of
crime.
ii. Measuring crime is necessary for various reasons. Some of these reasons
include describing crime, explaining why crime occurs, and evaluating
programs and policies.
iii. It is important to legislators, as well as concerned citizens, that crime
v. Another purpose of measuring crime is explanation. Identifying causes
requires that differences in crime rates can be related to differences in
people and their situations.
vi. Counting crime is also used to evaluate and justify programs and policies
that try to address criminal activity (e.g., rehabilitation, incapacitation,
deterrence).
II. Data from Law Enforcement Agencies
i. Law enforcement agencies throughout the United States gather a number of
crime statistics.
ii. The five methods used to accomplish this are the Uniform Crime Reports,
the Supplementary Homicide Reports, the National Incident-Based
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
A. Uniform Crime Reports (UCR)
i. Historical Overview
a. Between 1830 and 1930, the collection of crime statistics involved
various agencies. Individual cities, regions, and states collected
crime statistics for their respective regions in an effort to guide
policy-making.
b. During the 1927 meeting of the International Association of Chiefs
of Police (IACP), efforts were made to collect crime statistics in a
c. In 1960, these Part I crimes were termed the Crime Index. Part I
crimes were those crimes most likely to be reported to the police,
including murder, rape, robbery, aggravated assault, larceny,
burglary, and motor vehicle theft.
d. Information was collected on additional categories of crimes,
ii. The UCR Program
a. The primary objective of the Uniform Crime Reports (UCR) is to
generate a consistent (or reliable) set of crime statistics that can be
used in law enforcement administration, operation, and
management.
b. Over the years, however, the UCR has become one of the
country’s foremost indicators of crime. The UCR has provided
c. The FBI emphasizes that classifying and scoring crimes are the
two most important functions of agencies participating in the
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
iii. Limitations of the UCR
a. As early as 1931, there were criticisms concerning the UCR, and
some of these still apply to the current UCR. Even with these
criticisms, the UCR continues to be a major source of information
pertaining to crime in the United States.
b. It is essential to note that the UCR is a “summarybased system.”
These data are a summary, or total count, of crimes based on the
reporting agencies. The best-known summary UCR measures are
B. Supplementary Homicide Reports
i. Supplementary Homicide Reports: Part of the UCR Program. These data
provide more detailed information on the incident (e.g., the offender, the
victim).
ii. In addition to the SHR, another national data collection system
administered in the United States to collect detailed information on
C. The National Incident-Based Reporting System (NIBRS).
i. The NIBRS Program
a. The National Incident-Based Reporting System is an enhanced
version of the UCR Program that collects more detailed
information on incidents.
b. To further enhance participation, the UCR Program is working
with the Bureau of Justice Statistics on what has been referred to as
the National Crime Statistics Exchange (NCS-X).
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
c. The NCS-X is a “collaborative undertaking, supported by the
ii. Data Collection
a. While the UCR Program collects counts on the number of criminal
incidents involving eight offenses, and NIBRS expands the types
of offenses reported.
b. Since NIBRS uses an incident-based reporting system, it includes a
iii. Limitations of NIBRS
a. As with the UCR Program, NIBRS data include only crimes
reported to law enforcement; unreported and unrecorded crimes are
not included in NIBRS.
b. Since the NIBRS specifications were developed by a federal
agency, participating local agencies may find it difficult to work
with inflexible specifications and impose problems with reporting
procedures.
D. Hate Crime Data
i. On April 23, 1990, the president signed into law the “Hate Crime Statistics
Act of 1990.”
ii. The best-known hate crime data source is the Hate Crime Statistics, which
collect information on traditional offenses, such as murder and vandalism
that have an additional factor of bias.
SAGE Publishing, 2021
E. Data Collection
i. The collection of hate crime data provides additional information on
traditional UCR collection.
ii. Hate crimes are not separate, distinct crimes, but rather traditional offenses
motivated by the offender’s bias.
iii. If a traditional offense has been motivated by the offender’s bias, the
reporting agency is to complete the “Hate Crime Incident Report.
F. Law Enforcement Officers Killed and Assaulted Statistics
i. The FBI also collects data on the number of law enforcement officers
G. Data Collection
i. Law Enforcement Officers Killed and Assaulted (LEOKA) is a
supplementary data collection program of the UCR.
ii. Information obtained from these data assist agencies in developing policies
to enhance officer safety.
iii. The UCR Program provided the following definitions to distinguish
between line-of-duty, felonious, and accidental deaths.
iv. Line-of-duty death: This type of death occurs when the officer is on or off
duty and acting in an official capacity while reacting to a situation that
III. Data from Victims of Crime: The National Crime Victimization Survey
i. National Crime Victimization Survey: A primary measure of crime in the
United States. It is collected by the Department of Justice and the Census
Bureau and is based on interviews with victims of crime.
ii. The primary purpose of these data is to provide additional insight into what
was referred to at the beginning of this chapter as the dark figure of crime.
iii. Law enforcement agencies use the NCVS for
a. Enhancing citizen cooperation with officials in deterring and
detecting crime.
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
iv. The Law Enforcement Assistance Administration commissioned the
Committee on Social Statistics of the National Academy of Sciences
National Research Council (NRC) to evaluate the victim surveys.
v. The NCVS converted to a computer-assisted personal interviewing (CAPI)
environment.
A. Limitations of the NCVS
i. Crimes such as prostitution, drug dealing, and gambling are not often
revealed in interviews for obvious reasons.
ii. NCVS surveys only households, crimes committed against commercial
businesses (e.g., stores) are not included.
iii. The validity of the NCVS is also an issue. The validity of the NCVS refers
to whether is it measuring individuals who have been victims of crimes.
iv. Two different procedures have been used to test the validity of the
participants’ responses: forward record checks and reverse record checks.
a. A forward record check begins with victims’ reports, and these are
B. Comparing the NCVS with the UCR
i. Each program was developed to serve different purposes. While both
programs collect information on overlapping types of crimes, these types of
crimes are not necessarily identical.
ii. The UCR and the NCVS programs use different methods to collect crime
data. Thus, for some crimes, they use different definitions.
iii. The two programs use different bases to calculate rates for certain crimes.
iv. Since the UCR and the NCVS implement different sampling procedures,
there may be variations in estimates of crime.
IV. Data from Self-Report Surveys
i. Generally, surveys address four broad classes of questions.
a. The prevalence of attitudes, beliefs, and behaviors.
b. Changes in these attitudes, beliefs, and behaviors over time.
c. Differences between groups of people in their attitudes, beliefs,
and behaviors.
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
A. Monitoring the Future
i. Monitoring the Future is an annual self-report survey that collects
information to measure substance and alcohol use patterns among youths.
ii. Currently, the MTF survey of 12th-grade students contains about 1,400
variables.
iii. One limitation to the MTF research design is that it does not survey the
youth that drop out of high school.
B. The National Survey on Drug Use and Health
i. Since 1971, the National Survey on Drug Use and Health has been used
to collect information annually on the use of illegal drugs by individuals in
the United States.
ii. The NSDUH is one of the largest surveys of drug use ever conducted in the
United States.
iii. The primary goal of NSDUH is to provide national as well as state-level
estimates on the following.
a. The level and patterns of alcohol, tobacco, and illegal substance
C. National Youth SurveyFamily Study
i. In 1977, researchers at the University of Colorado implemented the
National Youth Survey (NYS).
ii. In 2000, the name of the survey was changed to the National Youth
SurveyFamily Study.
V. Additional Approaches to Collecting Data
i. The additional data collection efforts are usually for a more specific
purpose or target a more specific population.
A. Spatial Analyses of Crime
Schram, Introduction to Criminology 3e
SAGE Publishing, 2021
i. The Spatial Analyses of Crime focuses on crime places. One major
aspect is mapping crimes which provide information as location, distance,
direction, and pattern.
ii. Location is considered the most important piece of information.
iii. Distance is also a crucial element, and Direction is most helpful when