Version Date: Feb 24, 2010 View help for published
Principal Investigator(s): View help for Principal Investigator(s)
Lloyd D. Johnston, University of Michigan. Institute for Social Research. Survey Research Center;
Jerald G. Bachman, University of Michigan. Institute for Social Research. Survey Research Center;
Patrick M. O'Malley, University of Michigan. Institute for Social Research. Survey Research Center;
John E. Schulenberg, University of Michigan. Institute for Social Research. Survey Research Center
Series:
https://doi.org/10.3886/ICPSR04263.v2
Version V2
These surveys of 8th- and 10th-grade students are part of a series that explores changes in important values, behaviors, and lifestyle orientations of contemporary American youth. Students in each grade are randomly assigned to complete one of four questionnaires, each with a different subset of topical questions but containing a set of "core" questions on demographics and drug use. There are more than 450 variables across the questionnaires. Drugs covered by this survey include amphetamines (stimulants), barbiturates (tranquilizers), other prescription drugs, tobacco, alcohol, inhalants, steroids, marijuana, hashish, LSD, hallucinogens, cocaine, crack, ecstasy, methamphetamine, and injection drugs such as heroin.
Export Citation:
Users are reminded that these data are to be used solely for statistical analysis and reporting of aggregated information and not for the investigation of specific individuals.
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.
Variables omitted from the Western region questionnaires are noted in each codebook.
A user guide is provided with the study documentation. It contains two year-to-year cross-time question indices for the MTF 8th- and 10th-grade surveys. The first is sorted by question location and the second is sorted by subject area.
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 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 20 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.
Enrolled 8th- and 10th-grade students in the contiguous United States.
The student response rates for the 2004 8th- and 10th-grade surveys were 89 percent and 88 percent, respectively.
Hide2005-10-26
2010-02-24 Corrected data were provided by the PI for the question asking about binge drinking (item reference number 00850). Other minor corrections were made to the question text and value labels to provide greater consistency between matching variables in other years of data in the series.
2005-12-15 A user guide that includes a cross-time question index that is relevant to all eight parts has been added.
2005-10-26 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:
Each of the eight parts contains a weight variable, V5. They were originally varied by school but 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.
HideThe public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.
