NAEP Technical DocumentationReading Long-Term Trend Assessment Estimation Variables for 2008
Variables used in the population-structure model for the reading 2008 long-term trend assessment are listed and described below.
Main effects used in the population-structure model:
Race variables (from the student background questionnaire) – There are five variables: White, Black, Asian, American Indian, and Pacific Islander. These variables are marked as either “yes” or “missing.” Students are allowed to fill in more than one oval and, therefore, each one is a separate background variable.
DRACEM – School reported race. This variable has eight levels: White, Black, Hispanic, Asian, American Indian, multi-racial, other, and missing.
SDRACEM – Student reported race. This variable has seven levels: White, Black, Hispanic, Asian, American Indian, other, and missing.
SCHTYPE – Type of school. This variable has six levels: public, private, Catholic, Bureau of Indian Education, Department of Defense, and missing.
CENSREG – Regions as defined by the Census Bureau. This variable has six levels: Northeast, Midwest, South, West,
DoDEA Interantional, and missing.
REGION – Regions as defined by NAEP. This variable has six levels: Northeast, Southeast, Central, West,
DoDDS, and missing.
UTOL4 – Type of location. This variable has five levels: city, suburb, town, rural, and missing.
PARED – Parents education level. Information for this variable is collected from students aged 13 and 17 only. It has six levels: did not graduate from high school, high school graduate, some education after high school, college graduate, unknown, and missing.
SLUNCH1 – School reported free or reduced-price school lunch. This variable has four levels: eligible, not eligible, not available, and missing.
ACCOM2 –
Accommodations. This variable has three levels: accommodated, not accommodated, and missing.
.Main effects not used in interactions:
UTOL12 – Type of location. This variable has 13 levels: LrgCity, MidCity, SmlCity, LrgSubrb, MidSubrb, SmlSubrb, FrgTown, DistTown, RmtTown, FrgRural, DistRural, RmtRural, and Missing.
SLUNCH – School lunch. This variable has seven levels: NotEll, Red, Free, NoInfo, Refusal, NotPart, and Missing.
12 Additional Accommodations Variables – Each of these variables BilBook, BilDict, LargPrint, ExtTime, ReadAloud, SmallGrp, OneOnOne, Scrib/PC, Other, Breaks, Magnif, StaffAdmin are scored as Yes/Missing.
CENSDIV – Census division. This variable has 11 levels: NewEngla, Midatl, Eastnoce, Westnoce, Southatl, Eastsoce, Westsoce, Mountain, Pacific, DoDEA International, and Missing.
PCTBLKC – Percentage of Black students. This variable has six levels: 0, 1–5, 6–25, 26–50, 51+, and Missing.
PCTHSPC – Percentage of Hispanic students. This variable has six levels: 0, 1–5, 6–25, 26–50, 51+, and Missing.
PCTASNC – Percentage of Asian students. This variable has six levels: 0, 1–5, 6–25, 26–50, 51+, and Missing.
PCTINDC – Percentage of American Indian students. This variable has six levels: 0, 1–5, 6–25, 26–50, 51+, and Missing.
Two-way interactions included in the population-structure model: All main effects listed above were used to examine two-way interactions with the exception of Hispanic x Hispanic and CENSREG x REGION. (Note: Hispanic x Hispanic interaction means that Hispanic [yes, no, or missing] is not crossed with Hispanic from DRACEM or SDRACEM.)
Three-way interactions included in the population-structure model: Hispanic x 5 race variables x (each of the) main effects listed above
Variables obtained from student questionnaire:
Type of Hispanic: Mexican
Type of Hispanic: Puerto Rican
Type of Hispanic: Cuban
Type of Hispanic: Other
Family get newspaper
Family get magazines
Books in home
Computer in home
Encyclopedia in home
How many pages read in school and for homework
How much time spent on homework
Talk about studies at home
How many days absent
How much television do you watch
How far in school did you mother go (age 13 and 17 only)
How far in school did your father go (age 13 and 17 only)
Language other than English spoken in home
Which describes high school program (age 17 only)
How often do you read for fun (reading only)
How often do you tell a friend about a good book (reading only)
Variables obtained from students with disabilities (SD) and English language learner (ELL) questionnaires:
Items 1, 2, 7 (12 levels), 8, and 9 were obtained from the
SD questionnaire (659k PDF).
Items 1, 2, 7, 8, and 9 (4 levels) were obtained form the
ELL questionnaire (688k PDF).
Last updated 23 November 2011 (JL)
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