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Related Concept Videos

Wald-Wolfowitz Runs Test I01:17

Wald-Wolfowitz Runs Test I

The Wald-Wolfowitz test, also known as the runs test, is a nonparametric statistical test used to assess the randomness of a sequence of two different types of elements (e.g., positive/negative values, successes/failures). It examines whether the order of the elements in a sequence is random or if there is a pattern or trend present. This nonparametric test applies to any ordered data despite the population and sample data distribution, even if a higher sample size is available.
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Wechsler's Contribution to Measures of Intelligence01:23

Wechsler's Contribution to Measures of Intelligence

David Wechsler, a psychologist who worked with World War I veterans, developed a significant IQ test in 1939 called the Wechsler-Bellevue Intelligence Scale. This test was innovative because it combined several subtests that measured both verbal and nonverbal skills, reflecting Wechsler's belief that intelligence is a global capacity involving purposeful action, rational thinking, and effective interaction with the environment. This test later evolved into the Wechsler Adult Intelligence Scale...

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Related Experiment Video

Updated: Jun 28, 2026

Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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An argument for administering WISC-R Digit Span.

J G Evans, H A Hamm

    Perceptual and Motor Skills
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Always administer the optional Digit Span subtest of the WISC-R (Wechsler Intelligence Scale for Children-Revised). Including this subtest enhances the overall diagnostic utility of the intelligence test for children.

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    Area of Science:

    • Psychological Assessment
    • Educational Psychology
    • Child Psychology

    Background:

    • The Wechsler Intelligence Scale for Children-Revised (WISC-R) is a widely used tool for assessing child intelligence.
    • The Digit Span subtest is an optional component of the WISC-R.
    • Concerns exist regarding the consistent administration of all WISC-R subtests.

    Purpose of the Study:

    • To advocate for the routine administration of the Digit Span subtest.
    • To demonstrate how incorporating Digit Span enhances the WISC-R's utility.
    • To highlight the underutilization of the Digit Span subtest.

    Main Methods:

    • Review of WISC-R administration protocols.
    • Analysis of subtest factor loadings.
    • Argumentation based on psychometric principles.

    Main Results:

    • The Digit Span subtest is frequently omitted in WISC-R assessments.
    • Integrating Digit Span into subtest groupings based on factor analysis significantly improves the WISC-R's interpretability.
    • This integration increases the overall usefulness of the WISC-R for diagnostic purposes.

    Conclusions:

    • The Digit Span subtest should be consistently administered as part of the WISC-R.
    • Proper utilization of Digit Span, within a factor-based framework, maximizes the WISC-R's diagnostic power.
    • Increased administration of Digit Span will lead to more comprehensive child intelligence assessments.