Boston Diagnostic Aphasia Examination (BDAE)

Boston Diagnostic Aphasia Examination (BDAE) Evaluation Summary

What does the tool measure? The BDAE is designed to diagnose aphasia and related disorders.
What types of clients can the tool be used for? The BDAE can be used with, but is not limited to clients with stroke.
Is this a screening or assessment tool? Assessment
Time to administer 90 to 120 minutes (BDAE)

30 to 45 minutes (shortened version)

up to 2 1/2 hours (extended version)

Versions Shortened and extended versions
Other Languages English, Spanish, Portuguese, French, Hindi, Finnish, and Greek
Measurement Properties
Reliability – No studies have examined the internal consistency of the BDAE in clients with stroke.

– No studies have examined the reliability of the BDAE in clients with stroke.

Validity Content
No studies have examined the content validity of the BDAE in clients with stroke.
Criterion
Concurrent Validity: No studies have examined the concurrent validity of the BDAE in clients with stroke.

Predictive Validity. No studies have examined the predictive validity of the BDAE in clients with stroke.

Construct
Convergent/Divergent validity: 4 studies have examined the convergent validity of the BDAE and reported poor to adequate correlations between the repetition and the commands subscales of the BDAE and the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS); poor correlations between the BDAE and the Visuospatial Index of the RBANS and adequate correlations between the BDAE and the Language Index of the RBANS; adequate to excellent correlations with modified versions of the Stroke Impact Scale (Communication, Participation, Physical and Stroke Recovery domains) and Activity Card Sort (total, instrumental and low demand leisure scores); and excellent correlations with the Bilingual Aphasia Test (BAT) comparable automated sequences, listening comprehension and reading subtests.

Known Groups:
1 study has examined known groups validity of the BDAE-SF (Greek version) using Wilcoxon W and reported differentiation between healthy adults and patients with aphasia following stroke.

Floor/Ceiling Effects No studies have examined ceiling effects of the BDAE in clients with stroke.
Sensitivity/ Specificity No studies have explored the sensitivity/specificity of the BDAE.
Does the tool detect change in patients? No studies have examined the responsiveness of the BDAE in clients with stroke.
Acceptability The BDAE administration is lengthy and some clients can become irritated with the more simplistic items.
Feasibility The BDAE is widely used as an assessment of aphasia. Age and education-adjusted norms are available (Borod, Goodglass & Kaplan, 1980).
How to obtain the tool? The BDAE can be obtained from one of the following websites at costs from US$435 to US$496: