Achievement Tests

Achievement Test

Measure acquired knowledge and academic skills.

Wechsler Individual Achievement Test – Fourth Edition (WIAT-4)

• Purpose: Measures academic achievement in children and adults.

• Age Range: 4 years to 50 years 11 months.

• Format: Individually administered; paper-and-pencil and oral tasks.

• Measures:

  • Reading (word reading, comprehension, oral reading fluency)

  • Mathematics (problem solving, numerical operations)

  • Written Expression (spelling, sentence composition, essay writing)

  • Oral Language (listening comprehension, oral expression)

• Notes: Often paired with WAIS or WISC to compare ability vs. achievement for learning disability diagnosis.

Wide Range Achievement Test – Fifth Edition (WRAT5)

• Purpose: Brief screening of basic academic skills.

• Age Range: 5 years to 85+ years.

• Format: Paper-and-pencil; ~15–45 minutes.

• Measures:

  • Word Reading

  • Spelling

  • Math Computation

  • Sentence Comprehension

• Notes: Quick and efficient for initial assessments; not as detailed as WIAT.

Peabody Individual Achievement Test – Revised (PIAT-R)

• Purpose: Measures general academic achievement.

• Age Range: 5 years to adult.

• Format: Multiple-choice format; orally administered.

• Measures:

  • General Information

  • Reading Recognition

  • Reading Comprehension

  • Mathematics

  • Spelling

  • Written Expression

• Notes: Useful for individuals with reading difficulties; less writing involved.

Woodcock–Johnson IV Tests of Achievement (WJ IV ACH)

• Purpose: Comprehensive measurement of academic achievement.

• Age Range: 2 years to 90+ years.

• Format: Individually administered; can be done in short or extended batteries.

• Measures:

  • Reading (decoding, comprehension, fluency)

  • Mathematics (calculation, applied problems, fluency)

  • Written Language (spelling, writing fluency, expression)

  • Academic Knowledge

• Notes: Often paired with the Woodcock–Johnson Cognitive Abilities test for discrepancy analysis.

KeyMath–3 Diagnostic Assessment

• Purpose: Detailed assessment of math skills and concepts.

• Age Range: 4 years 6 months to 21 years.

• Format: One-on-one, oral and written tasks.

• Measures:

  • Basic Concepts (numeration, algebra, geometry, measurement)

  • Operations (addition, subtraction, multiplication, division)

  • Applications (problem solving, estimation)

• Notes: Helpful for diagnosing specific math learning disabilities.