Background: Previous studies have shown that the use of auditory feedback to improve balance ability and the improvement of upper limb ability of stroke patients through RAS using IM have been actively studied. However, there are insufficient studies to evaluate the patient''s balance ability including the ability to control the lower extremity and trunk. Therefore, the purpose of this study is to use as a basic data for the development of timing - functional evaluation for the balancing ability of patients considering the ceiling effect and fatigue which can be seen through the use of existing evaluation tool for stroke patients.

Method: The design of this study was a cross sectional study design, involving 30 adult stroke patients. Initial measurements were performed to determine the timing-functional movement test-retest reliability according to the physical ability assessment tool category. After 3 days, we revisited FIST, BBS, mPASS, 10MWT and TUG sequentially and then performed four timing-functional movement post tests.
Timing-Functional movement test-retest reliability was measured by intraclass correlation coefficients (ICCs) and Kappa values. The Pearson correlation coefficient was used to examine the linear relationship between measured variables. Absolute reliability was measured by standard error of measurement (SEM) [standard deviation of all test-retest scores × √(1-ICC)] for quantification of measurement errors.

Result: The results are as follows;
1. There was a statistically significant positive correlation between the button press and
wall touch.(r=.984, r=.364, r=.978).
2. Four timing measurements showed high test-retest reliability with ICC=.90 or better. Four timing measurements showed a reasonable level of reliability with ?=.45~.75. The SEM of the button press method and the wall touch method was less than 10% of the average value measured and was reliable.
3. The relationship between FIST score and wall touch was negatively correlated, Statistical significance was found in the measurements of the unaffected side, affected side, affected-unaffected side.(r=-.693, r=-.465, r=-.364).
4. The relationship between BBS score and step on the stool was negatively correlated, Statistical significance was found in the measurements of the affected side, affected-unaffected side.(r=-.511, r=-.492)
5. The relationship between mPASS score and step on the stool was negatively correlated, Statistical significance was found in the measurements of the affected side, affected-unaffected side(r=-.463, r=-.500).
6. The relationship between the 10MWT value and one step in front was positively correlated, Statistical significance was found in the measurements of the unaffected side, affected side(r=.376, r=.369).
7. The relationship between the TUG value and one step in front was positively correlated, Statistical significance was found in the measurements of the unaffected side, affected side, affected-unaffected side(r=.437, r=.471, r=.379).
Conclusion: In this study, we investigated the clinical usefulness of timing-functional movement using auditory feedback in evaluating the balance ability of stroke patients and found that it is useful for evaluating the balance ability of stroke patients with high reliability and validity.