In my line of work, I often refer parents for an assessment with an Educational Psychologist. This post will explain in detail the WISC and WIAT assessments which are commonly used to assess students and diagnose learning needs.
There are 16 different subtests which are grouped together in different ways to provide these key areas of assessment:
The FSIQ is derived from seven subtests and summarises ability across a diverse set of cognitive functions. This score is typically considered the most representative indicator of general intellectual functioning. Subtests are drawn from five areas of cognitive ability: verbal comprehension, visual spatial, fluid reasoning, working memory, and processing speed.
The Verbal Comprehension Index (VCI) measures the ability to access and apply acquired word knowledge. Specifically, this score reflects the ability to verbalise meaningful concepts, think about verbal information, and express yourself using words.
The Visual Spatial Index (VSI) measures the ability to evaluate visual details and understand visual spatial relationships in order to construct geometric designs from a model. This skill requires visual spatial reasoning, integration and synthesis of part-whole relationships, attentiveness to visual detail, and visual-motor integration.
The Fluid Reasoning Index (FRI) measures the ability to detect the underlying conceptual relationship among visual objects and use reasoning to identify and apply rules. Identification and application of conceptual relationships in the FRI requires inductive and quantitative reasoning, broad visual intelligence, simultaneous processing, and abstract thinking.
The Working Memory Index (WMI) measures the ability to register, maintain, and manipulate visual and auditory information in conscious awareness, which requires attention and concentration, as well as visual and auditory discrimination.
The Processing Speed Index (PSI) measures the speed and accuracy of visual identification, decision making, and decision implementation. Performance on the PSI is related to visual scanning, visual discrimination, short-term visual memory, visuomotor coordination, and concentration. The PSI assesses the ability to rapidly identify, register, and implement decisions about visual stimuli.
The WIAT tests students academic skills in the following areas:
Ask the psychologist to go through the results with you and explain what they mean for the child. Also, if you need further clarification later, call and ask. There is a lot of information to take in and it is likely to take more than one explanation.
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