The UNIT 2 is designed to provide a fair assessment of intelligence for individuals who have speech, language, or hearing impairments; have different cultural or language backgrounds; or are verbally uncommunicative. The manual describes studies of the UNIT 2 being used with Black/African American, Asian American/Pacific Islander and White examinees; Hispanic and non-Hispanic examinees; Native American and White examinees; English as a Second Language (ESL) and non-ESL examinees; and deaf and hard of hearing and non-deaf/hard of hearing examinees. Diagnostic information is provided that is relevant to common educational exceptionalities, including intellectual disabilities, giftedness, and learning disabilities.
The UNIT 2 consists of six subtests (Symbolic Memory, Nonsymbolic Quantity, Analogic Reasoning, Spatial Memory, Numerical Series, and Cube Design) that yield scores with a mean of 10 and a standard deviation of 3. In addition, the following seven composite scores are available, each with a mean of 100 and a standard deviation of 15: Memory, Reasoning, Quantitative, Abbreviated Battery, Standard Battery With Memory, Standard Battery Without Memory, Full Scale Battery.
Normative data were collected from a comprehensive national sample of 1,802 individuals in 33 states and keyed to the U.S. census estimates reported in Statistical Abstracts of the United States 2014. Reliability studies include internal consistency, test-retest, and scorer reliability. Coefficient alpha ranges from .88 to .96 for the subtests and .93 to .98 for the composites. Validity studies include content-description, criterion-prediction, and construct-identification. Criterion-prediction studies indicate large to very large correlations with CAS2, WISC-IV, SB-5, CTONI-2, WJ III Cognitive, and UMAS. Validity evidence reported in the Examiner's Manual demonstrates the test's value for the assessment of diverse groups of children.
New Features of the UNIT 2
- All new normative sample.
- All new studies of reliability and validity, including studies of diagnostic accuracy, particularly rigorous techniques involving the computation of sensitivity, specificity, and receiver operating characteristics/area under the curve (ROC/AUC).
- New upward extension of normative tables through age 21-11.
- New Quantitative subtests replace Object Memory and Mazes.
- Provides an entirely nonverbal stimulus-and-response administration format.
- Offers Abbreviated Battery, Standard Battery With Memory, Standard Battery Without Memory, and Full Scale Battery.
- Offers a wide breadth of use with exceptional students, including those with intellectual disabilities, learning disabilities, and giftedness.
- Provides a fair assessment of culturally and linguistically different examinees, including deaf and hard of hearing individuals.
- Reduces situational sources of test bias.
- Incorporates full color stimuli, manipulatives, and pointing response modes to engage examinees.
THIS TEST INCLUDES CERTAIN MANIPULATIVES WITH SMALL PARTS THAT MAY PRESENT A CHOKING HAZARD FOR CHILDREN UNDER THE AGE OF EIGHT. DO NOT ALLOW THE CHILD TO PLACE ANY MANIPULATIVE IN THEIR MOUTH. A TRAINED ADULT EXAMINER MUST ALWAYS CLOSELY SUPERVISE THE ADMINISTRATION OF THE TEST AND USE OF MANIPULATIVES BY CHILDREN.