Table 4.

Comparison of RT (mean ± SD) between the results of the present study and those in published literature

Age Group	Present Study RT (ms)	Published Literature RT (ms)
Younger Group (20–29 years)	238 ± 37	340 ± 100* 300 – 500 ** avg. +2.5 / year increase in reaction time
Middle-aged Group (40–49 years)	381 ± 53	325 (average)***
Older Group (60–69 years)	472 ± 75	N/A

^*Heron, et al., 2002; 19 subjects; age: 18–49 years

^**Ciuffreda, et al., 2000; 72 subjects; age: 21–50 years

^***Sun, et al., 1988; 6 subjects; age: 13–46 years