Reliability
Intratester reliability and standard error of measurement were determined for the AKE test. Twelve test subjects were randomly chosen (n = 5 control, n = 7 experimental subjects). A total of 6 AKEs were performed as previously described in the testing and treatment sequence. The sixth repetition was recorded and compared with the final (sixth) AKE performed in the pretest, which served as the second set of data. Subjects were tested on 2 separate days and at similar times to minimize diurnal effects. We used the intraclass correlation coefficient 2,1 to determine intratester reliability26 and the standard error of measurement to determine the precision of measurement.27 The intraclass correlation coefficient and standard error of measurement were 0.96 and 2.290, respectively.