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History of StanfordBinet

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A child's mental level corresponded to the age of normal children whose score the child equaled. ... verbal (vocabulary) and nonverbal (object series/matrices) ... – PowerPoint PPT presentation

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Title: History of StanfordBinet


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 7-23VC, 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 Comp NV/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 lt 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
Classifications from IQ Tests
  • 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 gt130
  • Superior 120-129
  • High Avg 110-119
  • Average 90-109
  • Low Avg 80-89
  • Borderline 70-79
  • MR lt70
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