Johnston, Lloyd D., Jerald G. Bachman, Patrick M. O'Malley, and John E. Schulenberg. Monitoring the Future: A Continuing Study of American Youth (12th-Grade Survey), 2004. ICPSR04264-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2005-12-15. https://doi.org/10.3886/ICPSR04264.v1
Persistent URL: https://doi.org/10.3886/ICPSR04264.v1
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high school students,
Date of Collection:
Unit of Observation:
High school seniors in the contiguous United States.
Data Collection Notes:
To protect the privacy 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.
omitted from the Western region questionnaires are noted in each
A user guide is provided with the study documentation.
It contains a year-to-year cross-time question index for the MTF
12th-grade surveys that is sorted by subject area, item reference
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 email@example.com.
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 with probability proportionate to the size of
the senior class. In schools with more than 350 seniors, a random
sample of seniors or classes was drawn. In schools with less than 350
seniors, all seniors 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). The total
sample was divided into six subsamples consisting of an average of
2,300 respondents, and each subsample was administered a different
form of the questionnaire, although all respondents answered the
"core" drug and demographic questions. The participation rate among
schools has been between 66 and 85 percent since the inception of the
Each of the seven parts contains a weight variable, V5.
They were originally varied by school but were modified to protect
respondent confidentiality. Use the weight variable for all analyses,
the results of which will differ slightly from published data tables
that used original data.
Mode of Data Collection:
The overall student response rate for 2004 was 82
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.
Created online analysis version with question text.
Performed recodes and/or calculated derived variables.
Checked for undocumented or out-of-range codes.