Wechsler Individual Achievement Test - Third UK Edition (WIAT-III UK)

Features and Benefits 

Subtests:

• 16 subtests to evaluate listening, speaking, reading, writing, and mathematics skills
• 3 new subtests - oral reading fluency, maths fluency and early reading skills 

Eight composite scores

• Oral Language
• Total Reading
• Basic Reading
• Reading Comprehension and Fluency
• Written Expression
• Mathematics
• Maths Fluency
• Total Achievement

Scores 

• Age-based standard scores
• Percentile ranks
• NCE’s
• Stanines age equivalents

Psychometric Information

The WIAT®-III^UK was standardised on a fully stratified sample of 744 children and young people, based on the UK 2011 Census. The WIAT®-III^UK will be correlated with the Wechsler achievement tests of comparable ages.

Updates to support EHCP, DSA and AA requirements, and best practice:

• New UK norms from 4:0 - 25:11 years
• Upwards extension of UK norms to 25:11 years 
• Standard scores for all subtests
• Comparisons with Wechsler ability scores

The Technical Manual does however also include the US norms up to age 50. Please note that any administrations from the age of 26 upwards would require hand scoring.