Johnston, Lloyd D., Jerald G. Bachman, Patrick M. O'Malley, and John Schulenberg. Monitoring the Future: A Continuing Study of American Youth (8th- and 10th-Grade Surveys), 2001. ICPSR03426-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2002. https://doi.org/10.3886/ICPSR03426.v1
Persistent URL: https://doi.org/10.3886/ICPSR03426.v1
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elementary school students,
junior high school students,
Date of Collection:
Enrolled 8th- and 10th-grade students in the contiguous
Data Collection Notes:
To protect the anonymity of respondents, all
variables that could be used to identify individuals have been
collapsed or recoded in the public use files. These modifications
should not affect analytic uses of the public use files.
year-to-year cross-time question indices for the MTF 8th- and
10th-grade surveys can be viewed on the SAMHDA Web site. The first is
sorted by question location and the second is sorted by subject area,
item number, and questionnaire form.
MTF does not release detailed geography codes in its public use files because of the disclosure risk it would cause. The MTF sample is drawn to generate representative samples of the four Census Bureau regions of the country (Northeast, Midwest, South, and West), but it does not generate representative samples of smaller geographic areas such as states, counties, or cities. For additional information about data that is withheld from the public use files please contact MTF directly at firstname.lastname@example.org.
Multistage area probability sample design involving three
selection stages: (1) geographic areas or primary sampling units
(PSUs), (2) schools (or linked groups of schools) within PSUs, and (3)
students within sampled schools. Of the 72 PSUs, 8 were selected with
certainty, 10 were selected with a probability of .50, and the
remainder were selected probability proportionate to the size the 8th-
or 10th- grade class. In schools with more than 350 students in the
grade, a random sample of students or classes was drawn. In schools
with less than 350 students in a grade, all students were asked to
participate. Each school was asked to participate for two years so
that each year one-half of the sample is replaced. Schools refusing
participation were replaced with similar schools in terms of
geographic location, size, and type of school (e.g., public,
private/Catholic, private/non-Catholic). For the 8th-grade survey,
schools with less than 15 8th graders were excluded from the
sample. For the 10th-grade survey, schools with less than 25 10th
graders were excluded. The participation rate among schools has been
between 66 and 80 percent since the inception of the study. The
student response rates for the 2000 8th- and 10th-grade surveys were
90 percent and 88 percent, respectively.
Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of
disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major
statistical software formats as well as standard codebooks to accompany the data. In addition to
these procedures, ICPSR performed the following processing steps for this data collection:
Standardized missing values.
Performed recodes and/or calculated derived variables.
Checked for undocumented or out-of-range codes.