| Instrument | General description | Reliability data | validity data |
| Boston Diagnostic Aphasia Examination | Boston Diagnostic Aphasia Examination, Third Edition is composed 50 subtests that allow both a qualitative and quantitative evaluation of language including speech melody, fluency, anomia, and syntactic organization and paraphasia types. | Internal reliability coefficients range from acceptable to high across subtests; alpha coefficients for Sentence Repetition and Boston Naming are greater than .95, while Word-Picture Matching is less than .65a,c | Convergent validity varies with subtest, with correlations of .86 and .93, for the auditory comprehensive measure with the Token Test and with Porch Index of Communicative Ability |
| Reitan-Indiana Aphasia Screening Test | Assesses symbolic-language related deficits such as, difficulties in reading, writing, naming, arithmetic, and repeating words and phrases. The test asks the patient to perform a series of tasks such as naming common objects, spelling simple words, identifying individual numbers and letters, reading writing/enunciating/understanding spoken language, identifying body parts, calculating simple arithmetic problems, differentiating between right and left, and copying simple shapes. | Review of the studies of Halstead-Reitan Battery suggest that the available data indicate adequate internal and test-retest reliability | Discriminant function analyses of the Aphasia and Sensory-perceptual Examination which permitted classification of subjects into their appropriate groups with the same degree of accuracy as achieved using the rest of the Halstead-Reitan Battery |