Pattern of Strengths and Weaknesses (PSW) Assessment

Psychological Processing Analyzer 9.0 (PPA)

Created by: Milton J. Dehn and Charles Szasz
Published by: Schoolhouse Educational Services
Qualification Level B

Qualification Level: B Click For More Qualification Level Information


The Psychological Processing Analyzer is software designed to identify the pattern of strengths and weaknesses (PSW) in achievement and psychological processes.

  • Statistically analyzes scores from more than 60 different test batteries
  • For use with selective, multi-battery testing of psychological processes
  • Analyzes strengths and weaknesses across 14 psychological processes
  • Analyzes strengths and weaknesses across 8 SLD achievement areas
  • Ideal for identifying the Pattern of Strengths and Weaknesses (PSW)
  • Identifies achievement scores that are consistent with processing weaknesses
  • Includes report with narrative, graphs, and tables
  • Allows unlisted composites and subtests to be entered
  • Allows a cognitive ability composite score to be used as the predictor

Psychological Processes Included

  • Attention
  • Auditory Processing
  • Executive Functions
  • Fine Motor
  • Fluid Reasoning
  • Oral Language
  • Orthographic Processing
  • Phonological Processing
  • Processing Speed
  • Verbal Long-Term Recall
  • Verbal Working Memory
  • Visual Spatial Long-Term Recall
  • Visual-Spatial Processing
  • Visual Spatial Working Memory

SLD Achievement Areas Included

  • Basic Reading Skills
  • Listening Comprehension
  • Math Calculation
  • Math Problem Solving
  • Oral Expression
  • Reading Fluency
  • Reading Comprehension
  • Written Expression

The Psychological Processing Analyzer (PPA) is not compatible with Chromebooks.

Psychological Processing Analyzer Resources

PPA Sample Report – Updated!

Helpful PPA Webinar – Using PSW to Determine SLD – Webinar

Format: Recorded Webinar
Presenter: Dr. Milton Dehn
The focus of this workshop is on PSW assessment procedures, with an emphasis on Dehn’s PSW model. The webinar includes procedures for identifying statistically significant strengths and weaknesses when multi-battery test results need to be analyzed. Information about the Psychological Processing Analyzer (PPA) is also included.
Using PSW to Determine SLD – Webinar

Psychological Processing Analyzer 5 Year Multi-Use Licensing Available!

Schoolhouse Educational Services, Inc. offers a prepaid, 5 year site license for both school and non school use.
Please visit our PPA Multi-License page for more information!

Pricing For Psychological Processing Analyzer 9.0

Individual License that includes download, manual, and free updates for two years
Window and Mac Version Updated 11 August 2023

Email Purchase Orders To:
Click Here For Email

Schoolhouse Educational Services
P.O. Box 397
Sparta, WI 54656

Shipping Policy
Purchases of internet-based tests and assessment software are delivered via the internet. An email with instructions will be sent when the order is received. Orders for in-stock books, laminates, and printed assessment materials are shipped within 72 hours. Special orders are excepted from this policy. Additional shipping charges apply to Alaska and all orders from outside the continental U.S.

Returns Policy

Please visit Refunds and Returns to view our policy on refunds and returns.