Test Format
Reading
- Word Reading: assesses pre-reading (phonological awareness) and decoding skills (naming letters, phonological skills, reading words from lists).
- Reading Comprehension: assesses types of reading comprehension skills taught in the classroom or used in everyday life (matching words to pictures, reading sentences aloud, orally answering oral questions about reading passages, silent reading speed).
- Pseudoword (phonetic) Decoding: assesses the ability to apply phonetic decoding skills. (Reading nonsense words aloud from a list ).
Math
- Numerical Operations: evaluates the ability to identify and write numbers ( e.g. counting, and solving paper & pencil computations).
- Math Reasoning: assess the ability to reason mathematically ( e.g. counting, identifying shapes, and solving verbally framed "word problems" ).
Written Language
- Spelling: evaluates the ability to spell (written spelling of dictated letters, sounds and words that are read in sentences).
- Written Expression: assesses the writing process (writing letters and words as quickly as possible, writing sentences, and writing a paragraph or essay).
Oral Language
- Listening Comprehension: measures the ability to listen for details (multiple-choice matching of pictures to spoken words).
- Oral Expression: assesses general ability to use oral language effectively (repeating sentences, generating lists, describing scenes and pictured activities).
The WIAT-III US consists of 16 subtests including several not featured in the second edition: Oral Reading Fluency, Math Problem Solving, Math Fluency Addition /Subtraction /Multiplication, Early Reading Skills, Alphabet Writing Fluency, Sentence Composition and Essay Composition. The test takes 45-90 minutes to administer depending on the age of the participant. The mean score for the WIAT-II is 100 with a standard deviation of 15, and the scores on the test may range from 40 to 160. 68% of participants in the UK standardisation sample obtained scores of 85-115 and 95% obtained scores of 70-130.
Read more about this topic: Wechsler Individual Achievement Test
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