Test-retest Reliability, Interrater Reliability, and Convergent Validity of the Targeted Box and Block Test in an Upper Extremity Prosthesis User Population.
Kimberly Kontson, Bin Wang, Nicole Leung and 2 others
PMID 40980521WHAT IT FOUND
The targeted Box and Block Test measures speed and accuracy in prosthesis users with high consistency between raters and sessions.
It correlates with the standard test but not all functional tasks, so use it to track grasping and placement precision.
Key findings
01Interrater reliability for completion time and unsuccessful transports was excellent (ICC 0.97-0.99), and test-retest reliability was good to excellent (ICC 0.84-0.90).
02Convergent validity with the standard Box and Block Test was strong (negative correlation expected due to scoring direction), but correlations with specific CAPPFUL tasks varied.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The sample size was small (n=20) and limited to myoelectric prosthesis users, which may affect generalizability to other prosthetic types. Test-retest intervals were short (same day or within one week), which may not capture longer-term stability or learning effects. The study did not assess responsiveness, so it is unclear how well the test detects meaningful clinical change over time.
Declared interests
None declared.
The easy way to misread this
Do not assume the tBBT measures all aspects of prosthetic function equally. It correlates well with the standard BBT and some CAPPFUL tasks, but not with the weights-in-crate task, suggesting it may not capture gross motor movements involving body rotation or bending.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →