Johnston, Lloyd D., Jerald G. Bachman, Patrick M. O'Malley, and John E. Schulenberg. Monitoring the Future: A Continuing Study of American Youth (8th- and 10th-Grade Surveys), 2009. ICPSR28402-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2010-10-27. https://doi.org/10.3886/ICPSR28402.v1
Persistent URL: https://doi.org/10.3886/ICPSR28402.v1
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high school students,
Date of Collection:
Unit of Observation:
Enrolled 8th- and 10th-grade students in the contiguous
Data Collection Notes:
This study was conducted by the Survey Research Center, Institute for Social Research at the University of Michigan.
In 2005, two of the questionnaire forms had a
new version of the race question. It included Hispanic as one of
the categories in addition to Black and White. For 2009, all four
forms had this new version for the race variable.
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 subject area and the second is sorted by question location.
Frequency and percentage distributions displayed in the 2009 codebooks are unweighted, rather than weighted by variable V5 as they had been in previous years. This change was made to simplify both the production of the codebooks and their interpretation
by the analyst.
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.
A multistage area probability sample design was used 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 using a probability based on their 2000 Census household count. In schools with more than 350 students in the grade, a sample of students or classes was drawn. In schools with less than 350 students in a grade, all students were asked to participate unless logistical challenges required a sample be taken. Each school was asked to participate for two years so that each year one-half of the sample would be 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.
Each of the eight 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.
Mode of Data Collection:
The student response rates for the 2009 8th- and
10th-grade surveys were 88 percent and 89 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:
Performed consistency checks.
Standardized missing values.
Created online analysis version with question text.
Checked for undocumented or out-of-range codes.
Restrictions: 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.