Analyses of single block Reaction Time and Commission Error with different ISI
Paired samples t-tests were conducted to detect in-depth changes in reaction time and commission errors from the first three blocks (1,2 and 3) to the last three blocks (16, 17 and 18) in the resting position, during low and during moderate intensity running. By doing that, the 1st and the 17th, the 2nd and the 18th and the 3rd and the 16th block were compared because they had 1, 2 and 4 second ISI, respectively.
Reaction Time in Block 1 compared to Block 17 (1sec ISI)
Reaction time during the 1 sec ISI was shown to change significantly from block 1 (311.6 ± 39.32ms) to block 17 (298.3 ± 37.13ms) during the low intensity condition; t(29) = 2.737, p < 0.05. There were no significant differences in reaction time in the 1sec ISI from block 1 to block 17 in the resting
condition (289.33 ± 42.59ms and 284.1 ± 45.98ms); t(29)=0.709, p > 0.05 or during the moderate intensity running (299.37 ± 43.45ms and 297.23 ± 39.33ms, respectively); t(29)=0.474, p > 0.05.
These results suggest that during the time period of the test (14min) low intensity but not resting or moderate intensity has an effect on reaction time when the visual stimuli are presented with a 1sec ISI.
Specifically, the results suggest that reaction time decreases within a bout of 14min running on low intensity. However, in the resting condition and during moderate intensity there is no difference in reaction time during the 14min duration of the CCPT test.
Commission Error in Block 1 compared to Block 17 (1sec ISI)
Commission Errors during the 1 sec ISI showed no significantly change from block 1 to block 17 in any condition (all p´s > 0.05). The baseline commission error went in block 1 from 1.17 ± 0.65 to 0.87
± 0.68; t(29)=1.964, p > 0.05 the low intensity ones from 0.87 ± 0.78 to 1.07 ± 0.69; t(29)=-1.235, p >
0.05 and the commission error made during moderate intensity changed from 1.13 ± 0.82 to 1.07 ± 0.74; t(29)=0.372, p > 0.05. These results suggest that during the time period of the test (14min) none of the exercise intensities had an effect on commission errors when the visual stimuli are presented with a 1sec ISI.
Reaction Time in Block 2 compared to Block 18 (2sec ISI)
Reaction time during the 2 sec ISI was shown to change significantly from block 2 to block 18 during the low intensity condition (328.37 ± 41.53ms to 318.23 ± 34.03ms); t(29)=2.155, p < 0.05 as well as during the moderate intensity condition (312.47 ± 27.48ms to 323.13 ± 35.17ms); t(29)=-2.412, p <
0.05. There was no significant difference in reaction time in the 2sec ISI from block 2 (288.50 ± 34.95ms) to block 18 (295.43 ± 40.54ms) in the resting condition; t(29)=-1.157, p > 0.05. These results suggest that during the time period of the test (14min) low intensity and moderate intensity but not the resting condition had an effect on reaction time when the visual stimuli are presented with a 2sec ISI. Specifically, the results suggest that reaction time decreases within a bout of 14min running on low intensity whereas reaction time increases within 14min running on moderate intensity.
However, in the resting condition there is no difference in reaction time during the 14min duration of the CCPT test.
Commission Error in Block 2 compared to Block 18 (2sec ISI)
Commission Error during the 2 sec ISI was shown to change significantly from block 2 to block 18 during the low intensity condition (1.37 ± 0.76 to 1.00 ± 0.69); t(29)=2.626, p < 0.05 as well as during the moderate intensity condition (0.97 ± 0.72 to 1.4 ± 0.67); t(29)=-2.765, p < 0.05. There was no significant difference in commission error in the 2sec ISI from block 2 (1.13 ± 0.63) to block 18 (0.83
± 0.79) in the resting condition; t(29)=1.663, p > 0.05. These results suggest that during the time period of the test (14min) low intensity and moderate intensity but not the resting condition had an effect on commission error when the visual stimuli are presented with a 2sec ISI. Specifically, the results suggest that commission error decreases within a bout of 14min running on low intensity whereas commission error increases within 14min running on moderate intensity. However, in the
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resting condition there is no difference in commission error during the 14min duration of the CCPT test.
Reaction Time in Block 3 compared to Block 16 (4sec ISI)
Reaction time during the 4 sec ISI showed no significantly change from block 3 to block 16 in any of the conditions (all p´s > 0.05). Reaction time during baseline went from 317.57 ± 45.20ms to 325.83 ± 46.11ms; t(29)=-1.721, p > 0.05 during low intensity from 340.50 ± 45.81ms to 344.37 ± 38.20ms;
t(29)=-0.612, p > 0.05 and during moderate intensity from 338.53 ± 39.51ms to 350.33 ± 39.61ms;
t(29)=-2.027, p > 0.05. These results suggest that during the time period of the test (14min) none of the exercise intensities had an effect on reaction time when the visual stimuli are presented with a 4sec ISI. However, reaction time during 4sec ISI showed a trend (338.53 ± 39.51ms to 350.33 ± 39.61ms;
t(29)=-2.027, p = 0.52) to increase within 14min running on moderate intensity.
Commission Error in Block 3 compared to Block 16 (4sec ISI)
Commission Error during the 4 sec ISI was shown to change significantly from block 3 (0.87 ± 0.57) to block 16 (1.23 ± 0.73) during the moderate intensity condition; t(29) = -2.257, p < 0.05. There were no significant differences in commission error in the 4sec ISI from block 3 to block 16 in the resting condition (1.03 ± 0.85 and 0.97 ± 0.76); t(29)=0.372, p > 0.05 or during the low intensity running (1.13 ± 0.73 and 0.83 ± 0.75); t(29)=1.874, p > 0.05. These results suggest that during the time period of the test (14min) moderate intensity but not resting or the low intensity condition has an effect on reaction time when the visual stimuli are presented with a 4sec ISI. Specifically, the results suggest that reaction time increases within a bout of 14min running on moderate intensity. However, during low intensity a trend for a decrease in commission errors was evident (p = 0.71) and in the resting condition there was no difference in commission error during the 14min duration of the CCPT test.
Figure 22: Reaction Time changes during running
Note. The x-axis represents the course during the 3 conditions baseline, low intensity and moderate intensity. On the y-axis reaction time is measured in milliseconds. The blue line indicates the 1 second interstimuli interval presentation, the red line the 2 seconds interstimuli interval period, the green line the 4 seconds interstimuli interval presentation. Paired-sample t-tests showed that during low intensity running reaction time decreased in both, the 2 and 4 seconds interstimuli interval presentations. During moderate intensity reaction time increased in the 2 second interstimuli interval condition during the time course of the test. Significance level was measured at the p < 0.05 level.
Figure 23: Commission Error changes during running
Note. The x-axis represents the course during the 3 conditions baseline, low intensity and moderate intensity. On the y-axis the amount of commission errors is depicted. The blue line indicates the 1 second interstimuli interval presentation, the red line the 2 seconds interstimuli interval period, the green line the 4 seconds interstimuli interval presentation. Paired-sample t-tests showed that during low intensity running commission errors decreased in the 2 seconds interstimuli interval presentation. During moderate intensity reaction time increased in both, the 2 and 4 second interstimuli interval conditions during the time course of the test. Significance level was measured at the p < 0.05 level.
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