Describing Students' Abilities Using the WJ IV Relative Proficiency Index (PA115)

Tuesday, February 26, 2019
12:00 PM–12:50 PM

  • PMD: 1
  • Skill Level: Intermediate

Learner Objectives

This session will help participants…

  1. participants will be able to describe how reporting assessment results to teachers and caregivers fits into the NASP Practice Model; specifically, data-based decision making and accountability.
  2. participants will be able to describe the difference between norm-referenced scores and the relative proficiency index.
  3. participants will be able to apply the RPI metric to write present-level statements, goals, and objectives for IEPs.


School psychologists typically report norm-referenced metrics such as standard scores to teachers and parents. While those scores describe a student’s rank order compared with a reference group, the scores do not completely describe a child’s overall level of functioning. This paper presentation will describe the relative proficiency index (RPI) metric, available in the Woodcock-Johnson assessments. Through case illustrations, participants will learn how to use RPI scores to inform IEP writing.

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Eric Snader, Houghton Mifflin Harcourt, Austin, TX
K R Duffy, Houghton Mifflin Harcourt, Boston, MA
Erica M. LaForte, Northwestern University, Chicago, IL

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