Below are the authors recommended retest intervals. They are not formal standards and serve as a guide for practitioners to consider in their assessment process. Practitioners are encouraged to confer with their organization's leadership when reviewing this guide. 


  • 12 Months for Tests of Cognitive Ability
  • 6 Months for the Tests of Oral Language
  • 6 Months for the Tests of Achievement


If you need to give a test again within 6 months, use an alternate form and avoid previously used tests from the Extended Battery