Group Assessment and Diagnostic Evaluation

Group Reading Assessment and Diagnostic Evaluation (GRADE)

Rating Summary

Classification Accuracyhalf bubble
GeneralizabilityModerate Low
Reliabilityfull bubble
Validityhalf bubble
Disaggregated Reliability and Validity DataN A
AdministrationIndividual Group
Administration & Scoring Time46-95 Minutes
Scoring KeyComputer Scored
Benchmarks / NormsYes
Cost Technology, Human Resources, and Accommodations for Special Needs Service and Support Purpose and Other Implementation Information Usage and Reporting

GRADE costs $129.95 - $323.50 (depending on the grade level) for the complete kit, which includes: 30 test booklets, Forms A and B, and the Administration, Scoring and Interpretation Manual.

Additional test forms can be purchased for $32.50 for a package of 10. Technical manuals are $35.50 and protocols are $3.25 per student.

There are three software options: (1) hand entry scoring and reporting software is $411.95; (2) scanning, scoring, and reporting software is $2,341.95; and (3) scanning with barcode scoring and reporting software is $2,695.95

Computer and Internet access are required for full use of product services.

Testers will require less than 1 hour of training to learn to administer the test, or 1 to 4 hours to learn to administer and interpret the test.

Paraprofessionals can administer the test.

Test booklets can be enlarged for students with visual impairments and students can respond with alternative response devices if they struggle or are unable to bubble in an answer sheet.

19500 Bulverde Road
San Antonio, TX 78259

Phone: 877-324-2401
Web Site:

Field-tested training manuals are included and should provide all implementation information.

Ongoing technical support is available.

The GRADE is a norm-referenced, standards-based reading assessment. It is intended for use with students in pre-kindergarten through young adult post-secondary students. It includes 11 test levels, each of which has two parallel forms (Form A and Form B). Every level contains multiple sections, or subtests.

The GRADE can be used to observe progress and track growth of an individual student or group of students (an entire class, building, or district) from form to form or from year to year.

GRADE can be administered individually or to a group. Administration usually takes 45-90 minutes, although the test is untimed. Scoring requires 1-5 minutes depending on whether scoring software is used or not.  

Available scores include: raw, standard, percentile, grade-equivalent, stanines, normal curve equivalents, subscale/subtest, composite, and error analysis.


Classification Accuracy

Classification Accuracy in Predicting Proficiency on the TerraNova Reading Subtest
False Positive Rate 0.08
False Negative Rate 0.15
Sensitivity 0.85
Specificity 0.92
Positive Predictive Power 0.73
Negative Predictive Power 0.96
Overall Classification Rate 0.91
AUC (ROC) 0.96
Base Rate 0.20
Cut Points: 88
At 90% Sensitivity, Specificity equals 0.84
At 80% Sensitivity, Specificity equals 0.93
At 70% Sensitivity, Specificity equals 0.95



Description of study sample:

  • Number of States: 37
  • Size: 260
  • Gender:
    • 48.7% Male
    • 51.3% Female 
  • Race/Ethnicity:
    • 90% White, Non-Hispanic
    • 10% Black, Non-Hispanic


Type of Reliability Age or Grade n (range) Coefficient SEM Information (including normative data)/ Subjects
range median
Internal Reliability- Total Test Alpha and Split Half Reliabilities 4-18 305-634 0.91-0.99 0.96 3.4-3.7  
Alternate Form Reliability 4-18 696
0.81-0.94 0.89    
Test-Retest Reliabilities 4-18 816
0.77-0.96 0.90    



Type of Validity Age or Grade Test or Criterion n (range) Coefficient (if applicable)
Range Median
Criterion Related Grade 1-6, Middle and High School ITBS, CAT, Gates-MacGinitie 617 (119-313) 0.69-0.90 0.83
Predictive Grade 2,4, 6 TerraNova 260 0.76-0.86 0.77