Validity and Reliability
The Modified BASS Balance Test is a sparsely used balance test. Due to insufficient validation, the test is not recommended in scientific practice.
Ambegaonkar et al. describe the test to have “acceptable reliability of 0.75”  and a validity of 0.46 [1, 8]. However, since the authors did not go any deeper on this, and the original source from Johnson and Leach (1968) is not available in a computerized version, it remains unclear to which kind of reliability is meant, and if the scientific methods used were sufficient to detect appropriate levels of reliability. Furthermore, the authors were unable to show the differences in balance between dancers and active non-dancers .
Tsigili et al. examined the reliability of the Modified Bass Balance Test by comparing it to the current standard test using a stabilometer, with no significant correlation being observed . Also, the authors recorded very high performance values (mean = 91.45) close to the ceiling of 100 points. This could have impacted variability values. The test seems too easy to perform for their population of undergraduate students .
The Modified BASS Balance Test records both static and dynamic movement errors. The end score, on the other hand, combines both scores. It is unclear if static and/or dynamic deficiencies get “washed out” or if the score accurately depicts a person’s balance .
As the tape marker distances remain constant and are the same for all participants of the test, it creates an unfair advantage for taller individuals who are less challenged to jump from marker to marker. Therefore, leg length differences make this test difficult for comparison but are not accounted for.