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The Stanford-Binet Intelligence Scales-Fifth Edition (SB5) have been widely known as the standard for intelligence measurement since 1916. This collection of 10 subtests, providing Nonverbal, Verbal, and Full Scale IQ scores and other diagnostic indexes, offers highly reliable assessment of intellectual and cognitive abilities, based on a large normative sample of 4,800 individuals, ages 2 to 85+. Under the requirements of the Individuals with Disabilities Education and Improvement Act (IDEIA, 2004), the SB5 provides a comprehensive profile of scores to document the cognitive strengths and weaknesses of children, adolescents, and adults with learning difficulties, delays, and disabilities.
Features and Benefits
Materials and Test Administration
The SB5 has a display box filled with blocks, toys, chips, and other manipulatives that engage the attention of children and examinees of all ages. The test is easy to learn because it is administered in an “easel format” with three 9″ by 6″ Item Books that fold into an “A-frame” easel. Each page of the Item Books has illustrations on one side for the examinee and detailed directions for the examiner on the other side. Each item has the spoken directions that examiners read in boldface type, along with other directions for using manipulatives, scoring guidelines, and correct answers. So, examiners do not need a separate manual to read while arranging stimuli and manipulatives. The Item Books include the following:
The Record Form was designed to match the widely used format of other IQ tests and guides the examiner through the initial subtests, the Nonverbal sections, and Verbal sections in that order.
Scoring and Interpretation
The SB5 can be hand-scored or scored with the optional SB5 Online Scoring and Report System. The scaled scores for the ten subtest scores are the familiar profile scores used in other IQ measures-with a mean of 10, and Standard Deviation of 3 (range 1-19). These subtest scores combine to form four types of composite scores: 5 factor indexes (Fluid, Knowledge, Quantitative, Visual-Spatial, and Working Memory), 2 domains (Verbal and Nonverbal), Brief IQ from 2 subtests, and Full Scale (each with scaled score means of 100, SD=15 (range 40-160)). Two subtests (one verbal and one nonverbal) combine to form each of the 5 factor indexes. There are two domain scales: Nonverbal IQ (combines the five nonverbal subtests) and Verbal IQ (combines the five verbal subtests). Two initial subtests combine to form the Abbreviated Battery IQ. Finally, the Full Scale IQ combines all ten subtests.
The Examiner’s Manual provides detailed suggestions for interpretation of subtest and composite scores, tables of norms, and additional interpretive guidelines. Supplemental interpretive tables and indexes are included in the Technical Manual and Supplemental Interpretive Manual. The scoring software automates the interpretive process by displaying narrative descriptions of scores and graphic profiles, along with identification of significant score differences.
Statistical Characteristics of the SB5
Normative data for the SB5 were gathered from 4,800 individuals between the ages of 2-0 and 85+ years. The normative sample closely matches the 2000 U.S. Census (education level based on 1999 data). Bias reviews were conducted on all items for the following variables: gender, ethnicity, cultural, religion, region, and socio-economic status. Additionally, the SB5 was co-normed with the Bender-Gestalt Visual-Motor Gestalt Test, 2nd Edition and linked to the Woodcock-Johnson Tests of Achievement.
Reliabilities for the SB5 are very high. For the FSIQ, NVIQ, and VIQ, reliabilities range from .95 to .98 (average internal consistency composite reliability, across all age groups). Reliabilities for the Factor Indexes range from .90 to .92. For the ten subtests, reliabilities range from .84 to .89.
Extensive validity studies were conducted, including clinical-group differences, correlations with other tests, age trends, factor structure, and consequential validity. Many of these studies are presented in the Technical Manual and others in the Supplemental Interpretive Manual.
Supplemental Interpretive Manual
The Interpretive Manual provides detailed guidelines for the effective interpretation of the SB5 for a number of applications, including its use by psychologists active in school, clinical, and counseling settings. Case studies, profile analyses, and SB5 Scoring Pro reports provide concrete examples of interpretation. This manual also introduces an Extended IQ (EXIQ) scale that supports the calculation of Full Scale IQ scores substantially lower than 40 (e.g., to an IQ of 10) or higher than 160 (to an IQ of 225).
The SB5 blends many of the important features of earlier editions with significant improvements in psychometric design. Modern item response theory provides a strong psychometric foundation for the routing, subtests, and functional-level design. The 2 subtests in Item Book 1 allow the remainder of the test to be adapted to the examinees estimate ability level. Research has shown that adapting the test to the functional level of the examinee increases the precision of measurement by tailoring the difficulty of the items to examinee levels, and saves time by allowing more cognitive tasks to be covered in the same time period.
Optional – “Change-Sensitive Scores” (CSSs) use modern item response theory scaling to convert the raw scores into criterion-referenced scores “anchored” to age levels and the complexity of the items at each score level. These scores, as with norm-referenced scores, have excellent measurement properties. Because the CSSs measure absolute (across age) levels of ability, they provide a means to compare changes in an individual’s scores over time. Relatively small “gains” or “losses” in intellectual ability can be tracked using CSSs across time with students in special education. Parents and guardians of individuals with special needs will appreciate the straight-forward information that will be identified with changes in CSSs over time. In contrast, when normative scores such as percentiles are used instead of CSSs, changes across years are often hidden because the individual with special needs often lags behind age peers and does not “catch up” when normative scores are used alone.
University Training Resources
The SB5 University Training Resources contains a CD-ROM with a PowerPoint presentation, along with PDF documents for Tips for Examiners, Frequently Asked Questions, selected Assessment Service Bulletins, and other resources. This package is designed for use by university professors and training professionals to help teach others the use of the SB5.
COMPLETE SB5 (©2003) INCLUDES:
DOWNLOAD ADDITIONAL RESOURCES:
SB5 Subtest Raw Score Means and Standard Deviations by Age Categories of the SB5 Technical Manual and Standardization (ages 3 to 80+)
WARNING – CHOKING HAZARD: Small parts not for children under 3 years. This test includes certain manipulatives with small parts that may present a choking hazard and should only be administered to children less than three years of age, under the close supervision of the test administrator. A trained adult examiner must always closely supervise the administration of the test and use of manipulatives by children.
Ages: 0-5 (Pre-School), Ages: 5-8 (Lower Primary), Ages: 8-10 (Middle Primary), Ages: 10-12 (Upper Primary), Ages: 12-15 (Junior Secondary), Ages: 15-18 (Senior Secondary), Ages: 18+ (Adult)
Gale H. Roid
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