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History of Stanford-Binet

History of Stanford-Binet. Binet-Simon scale of 1905. 30 items designed to measure judgment, comprehension, and reasoning which Binet deemed the key characteristics of intelligence. Heavily verbally weighted.

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History of Stanford-Binet

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  1. History of Stanford-Binet • Binet-Simon scale of 1905. • 30 items designed to measure judgment, comprehension, and reasoning which Binet deemed the key characteristics of intelligence. • Heavily verbally weighted. • Standardized by administering to 50 normal children and some retarded children and adults.

  2. History of S-B (continued) • 1908 scale- Greater standardization sample (n = 300; 3-13). • Tests grouped into age levels on the basis of performance. • Mental level (later mental age) = score on the test. A child's mental level corresponded to the age of normal children whose score the child equaled. • 1911 scale- Tests added at the adult level. • Binet died in 1911.

  3. History of S-B (continued) • 1916- Test restandardized with 1000 children & 400 adults. • 1937 – Two equivalent versions of the test were created (forms L & M). 3,200 were used in standardization from 1.5 to 18 yrs. • 1960 – Best items of forms L & M were combined. Standardization (N = 4,500) with age 2.5 to 18 yrs. • 1972 – Standardized (N = 2,100) using stratified random sample; ages 2 to 18.

  4. History of S-B (continued) • 1986 (SBIV) - Standardization - N= 5,000. Ages 2 to 23; 47 states and DC. • Composite Score – All subtests correlated with CS (Big G) ranging from .8 (Vocabulary) to .54 (Memory for Objects) • For ages 2-6: Verbal Comprehension & Nonverbal Reasoning/Visualization Factors emerged. • For ages 7-23:VC, NR/V, & Memory were factors • The Vocabulary Subtest serves as a Routing Subtest. Only certain subtests are given at certain ages.

  5. Properties of S-B • Composite Score (Mean = 100; SD = 16) • Area Scores (Mean = 100; SD = 16) • Subtest (Mean = 50; SD = 8) • 2 Factors for Children (2-6) • Verbal CompNV/Visualization • Vocabulary Pattern Analysis • Comprehension Copying • Absurdities Bead Memory • Memory for Sent Quantitative

  6. Stanford-Binet 5th Edition (2003) • Standardization- 4,800 individuals from aged 2 to 85+. 10 subtests. Typically takes 45 to 75 minutes for full test. Uses two routing subtests, verbal (vocabulary) and nonverbal (object series/matrices). • Used 2000 U.S. Census (variables = geographic region, socioeconomic levels, and ethnicity).

  7. Overview of S-B V • Reliability • K-R = .97 to .98 (Full Scale), Similar for 5 Factor Scores (.90 and higher); Individual subtests (.84 and higher). • SEM = < 3 points for Composite score. 3 to 6 points for Factor scores. • Test-retest reliability = .92 for Full Scale for 4 age groups (2-5; 6-20; 21 & .90 to 59; 60+)

  8. S-B V (continued) • Validity • Five Factors Emerged • (Principal Components; Varimax rotation) • Fluid Reasoning • Knowledge • Quantitative Reasoning • Visual-Spatial Processing • Working Memory

  9. Overview of S-B V(continued) • Validity • Good concurrent validity with: • WPPSI-R (.83) • WISC-III (.84) • WAIS-III (.82)

  10. Stanford-Binet Very gifted 145+ Gifted 130-144 Superior 120-129 High Average 110-119 Average 90-109 Low Avg. 80-89 Borderline impaired 70-79 Mild MR 55-69 Moderate MR 40-54 Wechsler Tests Very Superior >130 Superior 120-129 High Avg 110-119 Average 90-109 Low Avg 80-89 Borderline 70-79 MR <70 Classifications from IQ Tests

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