The Wechsler Intelligence Scale for Children-IV (WISC-IV) is an intelligence test used to measure the cognitive abilities of children between the ages of 6 years 0 months and 16 years 11 months. In addition to assessing intelligence levels, the test provides insights into a child’s strengths and weaknesses in cognitive abilities. By identifying all of his cognitive abilities—whether they are on track or behind—it becomes possible to further develop his strengths or support his areas of weakness. The data obtained from the WISC-IV helps us determine how far a child’s cognitive functioning lags behind or exceeds that of his peers, while also serving to raise awareness about children with exceptional cognitive potential. Furthermore, it enables the prompt development of appropriate support programs tailored to address weaker cognitive skills that require improvement.
As the fourth member of the Wechsler Intelligence Scale for Children family, the WISC-IV was adapted by Öktem et al. (2008–2012) after the Turkish Psychological Association (TPD) acquired the commercial and scientific copyrights in 2008. It is the most up-to-date intelligence scale for children and adolescents in Turkey, with validity and reliability studies completed in 2013.
General Information About the WISC-IV
The WISC-IV consists of a total of 15 subtests—10 core and 5 supplementary—distributed across 4 cognitive ability clusters. In cases where administering the core subtests is not appropriate for various reasons, the supplementary subtests are used; however, the recommended administration for every child includes all 10 core subtests. The estimated administration time ranges from 90 to 120 minutes, depending on the child’s work pace.
Although it is preferred that the assessment be completed in a single session, a short break may be taken depending on the child’s needs and performance during the process. A waiting period of at least one year is required before administering a second WISC-IV assessment to the same child.
The test consists of four main sections:
1. Verbal Comprehension (consists of 5 separate subtests): These assess reasoning, comprehension, concept formation, verbal knowledge, and verbal expression skills. Each task requires the ability to understand auditory stimuli, retrieve information encoded verbally in long-term memory, and express responses verbally. In addition to verbal knowledge, it represents crystallized reasoning, which reflects learned knowledge and skills. It predicts language and cultural proficiency as well as academic achievement.
2. Perceptual Reasoning (consists of 4 separate subtests): Measures fluid and perceptual reasoning and perceptual organization. Each task requires skills related to visual perception and organization, reasoning using visually presented nonverbal material, and functions involved in managing and organizing information.
3. Working Memory (consists of 3 separate subtests): Measures short-term auditory memory, attention, concentration, and working memory. Each task requires skills in selective and sustained attention, as well as mental manipulation.
4. Processing Speed (consists of 3 separate subtests): Measures mental processing speed and letter-motor processing speed. Each task requires the efficient production of multiple motor responses, including visual perception and organization, visual scanning, competent control of attention, sustained effort, and speed. Before a child takes the WISC-4 intelligence test, it is essential to ensure that certain conditions are met. It is recommended that the child arrive well-rested, having had a good night’s sleep, with a full stomach, and on a day when he is feeling motivated as usual. Comfortable clothing should be worn. Additionally, the child should not be told that he is being taken for an intelligence test, as this could cause anxiety, tension, worry, or a sense of threat. While the child is being brought to the assessment, he should not hear terms such as “test,” “intelligence test,” or “exam.” Furthermore, anxiety-inducing instructions such as “Do your best,” “Be careful,” or “Listen carefully” should not be given to the child. The psychologist will provide the necessary explanations to the child before the assessment begins.