GEDTS documentation of overall potential for candidates with LD and
ADHD requesting test accommodations may come from two categories of
primary and secondary,
or supporting, intelligence tests. In all cases standard
results from one of the primary tests must be recorded on Form
If testing has not been done in the past current assessment must
include a primary measure of overall cognitive potential; i.e.,
assessment using the WAIS-III or the SBIS-IV. These are both Level
C tests. This means a professional with advanced training and
licensure or certification to administer such a test must document
the test results.
Many candidates already have LD or ADHD documentation. When that is the case new documentation of overll cognitive
potential may not be
necessary if the previous test results include a primary measure
of intelligence listed below and if these test results represent
or adult cognitive functioning. In this case test scores from the
previous testing can be transferred to Form L-15
Sometimes a psychologist will use additional testing to better illustrate
the quality of cognitive assessment. Such tests would come from the
secondary or supporting group of tests.
If a candidate has testing done as a child ( e.g., WISC-R scores), a
current update would be necessary. This could be accomplished with the
WAIS-III or test scores from a secondary test of intelligence such as the
PPVT-3 could be provided to support the previously administered WISC-R
scores. A measure of adult cognitive functioning is needed.
This page provides a basic explanation
intelligence tests. Both primary and secondary assessment instruments are
reviewed. The page looks primarily at measures that have adult norms.
Primary measures of IQ
Adult Intelligence Scale-Revised or III (WAIS-R or III)
The WAIS-3 is the revised form of the WAIS-R test. The age range of the
test is 16-89. The test is made up of 11 subtests that are part of the IQ
measure. One half of these tests require verbal logic and reasoning. The
remaining subtests looks at nonverbal reasoning. The relative strengths
and weaknesses of a person's performance on these subtests enables the
psychologist to understand how a person processes information. The
nonverbal scale also enables the psychologist to measure cognitive
potential with relatively limited intrusion from verbal abilities. This
means it can be a measure that is relatively "culture fair." In addition
to the IQ scores the WAIS-3 provides index scores for Verbal Comprehension,
Perceptual Organization, Working Memory and Processing speed. Like the IQ
scores these are standard scores with a mean of 100. This is a Level C
test. To learn more about
the individual subtests and how they may be interpreted click the WAIS-3
sample case provided in the links at the end of this page.
Intelligence Scale for Children-III (WISC-III)
Like the WAIS-3, the WISC-III is a revision of the WISC-R.
The age range of this test is 6 1/2-16 1/2. The format is very much like
the WAIS-3. The Verbal measures of ability subtests include Information,
Vocabulary, Comprehension, and Digit Span. The nonverbal subtests include
Picture Completion, Coding, Picture Arrangement, Block Design, Object
Assembly, Symbol Search and Mazes. The WISC-III provides both index and
IQ scores as well. This is a level C test.
Intelligence Scales-IV (SBIS-IV)
The Stanford Binet is used by many school
psychologists to assess overall
cognitive ability. It has an age range from 2 to adult. The test has been
relatively recently revised. Unlike the one IQ measure that the old
Stanford Binet provided the new version provides many IQ scores as well as
the overall measure of cognitive potential. These S.A.S. scores measure
verbal reasoning, abstract/visual reasoning, quantitative reasoning and
short term memory. These are presented as standard scores withe a mean
score of 100. These scores can be compared to determine patterns of
relative strengths and weakness.
The different subtests make the Binet more appropriate across populations
since both verbal and nonverbal abilities are better defined. The
previous version of the Stanford Binet was very verbally ladened. This
should raise issue of concern when testing minority populations where
language or culture may vary. This is a Level C test.