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Corsi Block-Tapping Task

Corsi Block-Tapping Task

What is CBTT

The Corsi Block-Tapping Task is widely used for the assessment of visuospatial short-term memory, both in clinical practice and in experimental research settings. Basically, it is a span task and, as such, a visuospatial analogue to the digit span as an index of verbal short-term memory (Lezak, 1995). Originally developed by Corsi (1972), this test entails simple measurements that can be administered quickly and easily, even with patients who are difficult to test.

CBTT Printable PDF

You can create a free account on PsyPack to access fillable PDFs, manuals and educational resources for the CBTT

CBTT Scoring and Interpretation

PsyPack can automatically score the CBTT assessment and prepare corresponding tables and graphs.


Memory, Visuospatial short-term memory

What does CBTT measure

The purpose of the evaluation is to:

  • assess visuospatial short-term memory.



Type of outcome tool


Assessment modes


Age and eligibility

18 years and above

Estimated time

Less than 5 minutes


Since the task relies on client self-report, all responses should be verified by the clinician, and a definitive diagnosis is made on clinical grounds taking into account how well the client understood the task, as well as other relevant information from the client.

Attribution and References

Kessels, R. P. C., van Zandvoort, M. J. E., Postma, A., Kappelle, L. J., & de Haan, E. H. F. (2000). The Corsi Block-Tapping Task: Standardization and Normative Data. Applied Neuropsychology, 7(4), 252-258. Corsi, P. M. (1972). Human memory and the medial temporal region of the brain. Dissertation Abstracts International, 34, 819B.