Researchers studied the validity of the GRE by determining the relationship between different test sections and psychometric characteristics on the 4 chosen populations and the convergent and discriminant validity of each section. Each of the 3 sections (verbal, quantitative, analytical ability) were further divided based on question type into a total 10 subsections. Maximum likelihood (MLH) estimates were used to find invariant variance-covariance matrices for the relationships between question type and abilities. 

Construct Validity of the GRE Aptitude Test Across Populations - An Empirical Confirmatory Study

Researchers examined the validity of GRE tests for students in different graduate school disciplines by dividing test takers into 3 categories – everyone who took the test (population), those who applied for grad school (applicant pool), and those who were accepted into grad school. They could not find differences due to discipline and concluded that the GRE is very specific and highly susceptible to sampling variation. 

Generalization of GRE General Test Validity Across Departments

- "Construct Validity of the GRE Aptitude Test Across Populations - An Empirical Confirmatory Study" 
- "Generalization of GRE General Test Validity Across Departments"

University of Michigan - Ann Arbor

- Graduate Record Examination (GRE)
- Gates-MacGinitie Reading Comprehension Test
- Neale Analysis of Reading Ability
- Woodcock-Johnson-III Passage Comprehension
- Gray Oral Reading Test
- Nelson-Denny Reading Comprehension Test
- Wechsler Individual Achievement Test (WIAT)
- Diagnostic Assessment of Reading Comprehension (DARC)
- California Achievement Test
- Metropolitan Achievement Test
- Stanford Achievement Test
- Iowa Test of Basic Skills
- Group Reading Assessment and Diagnostic Evaluation (GRADE)

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