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Wechsler Intelligence Scale for Children

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amanda koch

on 6 December 2012

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Transcript of Wechsler Intelligence Scale for Children

Wechsler Intelligence Scale for Children By: Christa, Mandy, Audrey, Julie Information: The Wechsler Intelligence Scale for Children (WISC) is commonly used by clinicians, child psychologists, and researchers to assess a child’s intelligence. IQ levels, cognitive functioning, and multiple subtests such as visual perceptual skills, verbal skills, and various cognitive other abilities are examined through the WISC to determine a child’s intellectual capabilities. Author: Dr. David Wechsler Important Dates: Purpose: The WISC provides more than IQ scores. It provides essential information and critical clinical insights into a child’s cognitive functioning. This assessment is often used to aid in diagnosing learning disabilities and other ailments such as Attention Deficit Hyper Disorder. Population: -Children ages 6 years- 16 years and 11 months. Target children who are gifted and/or developmentally disabled, it looks for verbal and nonverbal intelligence. The test also helps with children who are struggling with behavior disorders, such as ADD/ADHD The WISC has gone through four revisions since its initial design in 1939, with the latest revision in 2003. Dr. Wechsler continued to modify the assessment because of his decision to make the test available to various age groups with results that provided as much validity as possible. Administration -The WISC is taken individually with an administrator present, to give instructions. The administrator is allowed to stop the test early if they feel the child has reached their capacity. Length:

-There are 13 subtests (Information, similarities, arithmetic, vocabulary, comprehension, digit span, picture completion, coding, picture arrangement, block design, object assembly, symbol search, mazes) to the WISC and it taking 50-90 minutes to complete Cost:

The cost of IQ testing is $410. This includes administration of the test to your child, scoring of the test, and a written report specifying results and recommendations. Scoring Method:

-There are four main sections to the Wechsler Intelligence Scale for Children - Fourth Edition
-Verbal Comprehension Index
-Perceptual Reasoning Index
-Working Memory Index
-Processing Speed Index
-The scores from these four sections are added together to make the Full Scale IQ (FSIQ)
-Scores can also be compared across sections to find weaknesses in particular areas
-In general, an overall score of 100 is average, over 130 indicates high intelligence, and under 70 can indicate mental deficiency Reliability for WISC-IV:

-Internal consistency was measured using the split-half method and test-retest reliability
-Reliability was acceptable, ranging from .70 to .90 Validity for WISC-IV:

-Compared to other accepted tests, such as WISC-III, Children's Memory Scale, Gifted Rating Scale
-A group of children was given the test. Children who were diagnosed with a form of mental retardation generally scored lower on the test, while children who were labelled as gifted generally scored higher. The control group scored in between.
Research Examples:

-In a test by the Texas Research Institute of Mental Sciences, Juveniles with violent records were given the WISC-IV, and were found to score differently than juveniles with non-violent offenses

-Thomas Oakland and Josette G. Harris examined groups of children taking the WISC-III and the WISC-IV(Spanish edition). The children were not native speakers of English, and they were examined to see what impact their test-taking habits had on their FSIQ. For the WISC-III, the children who had negative test-taking habits had notably lower FSIQs. In the case of the WISC-IV(Spanish edition), negative test behaviors only seemed to affect children aged 13-16.

-Typically, the WISC-IV is used to determine mental deficiencies or unusually high intelligence in children on a small scale. Popularity:

-most widely used intelligence test for children along with the stanford binet test.

-used mostly to find children who are in need of educational help. (special education)

-found to be a little better than stanford binet test in terms of scoring. the Wechsler test did grading against children of the same age not their actual age against mental age. Critique:

-The test gives a profile of the child's individual strengths. it is said that this test may not provide reliable information and should take the most general score. Strengths:

-has a good scoring method
-helps to understand a child's more specific needs
useful for understanding children's cognitive functioning.
-well standardized, provides reliable and valid estimates of general intelligence. Weaknesses:

-inconsistencies in scoring structure. What the total measure makes interpretations of certain scores difficult to understand.
-shows bias
-too many difficult questions Future Revisions:

-Need to eliminate the bias; Main ones towards girls.
-more a broad span of difficulty of questions.
(equal amount of easy and hard) THE END
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