ICPSR Metadata record for Monitoring the Future: A Continuing Study of American Youth (8th- and 10th-Grade Surveys), 1998 ICPSR ICPSR metadata records are licensed under a Creative Commons Attribution-Noncommercial 3.0 United States License (http://creativecommons.org/licenses/by-nc/3.0/us/). Monitoring the Future: A Continuing Study of American Youth (8th- and 10th-Grade Surveys), 1998 MTF 1998 (8th/10th Grade) Johnston, Lloyd D. Bachman, Jerald G. O'Malley, Patrick M. Schulenberg, John Inter-university Consortium for Political and Social Research ICPSR 2007-08-29 2752 doi://10.3886/ICPSR02752.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 two questionnaires, each with a different subset of topical questions but containing a set of "core" questions on demographics and drug use. There are about 300 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, and injection drugs such as heroin.
 UniverseScheme02752 Monitoring the Future (MTF) Series For more information on the series, please go to http://www.icpsr.umich.edu/ICPSR/series/00035. Organization02752_1 3-R01-DA-01411 ICPSR.XVII.C.1 RCMD.IX NACJD.XI NAHDAP.I adolescents attitudes crime demographic characteristics drug education drug use family background gender roles high school students human behavior lifestyles religious attitudes self esteem social change tobacco use values youths United States 1998 1998 individual Enrolled 8th- and 10th-grade students in the contiguous United States. 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. Separate samples were drawn for each grade. Of the 80 PSUs, 8 were selected with certainty and 72 were selected with probability proportionate to size based on the size of the 8th- (or 10th-) grade class in each school. In schools with more than 400 8th (or 10th) graders, a random sample of students or classes was drawn. In schools with less than 400 8th (or 10th) graders, all students were asked to participate. Each sampled 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. 1998 1998

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:

  • Performed recodes and/or calculated derived variables.
  • Checked for undocumented or out-of-range codes.
Each of the seven parts contains a weight variable, V5. They were originally varied by school but were modified to protect respondent confidentiality. Users should use the weight variable for all analyses, the results of which will differ slightly from published data tables that used original data. The participation rate among schools has been between 66 and 80 percent since the inception of the study. The student response rates for the 1998 8th- and 10th-grade surveys were 88 percent and 87 percent, respectively. ICPSR
AVAILABLE. This study is freely available to the general public.
The original collector of the data, ICPSR, and the relevant funding agency bear no responsibility for use of the data or for interpretations or inferences based upon such uses.
Inter-university Consortium for Political and Social Rearch ICPSR
Ann Arbor MI
http://www.icpsr.umich.edu/ netmail@icpsr.umich.edu United States Department of Health and Human Services. National Institutes of Health. National Institute on Drug Abuse 2007-08-29 ICPSR 2007-08-29 This update created ready-to-go file formats for downloading on the Web site and to add Stata set-up files. StudyUnit02752
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.