RT Score at 4000ms Delay

A 2 (treatment groups: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 4000ms delay. The ANOVA found no evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = .004, p = .95, η2 = .024. There was no evidence of a difference between groups, F (1,108) = 1.65, p = .20. In addition, there was no evidence of a significant interaction between groups and RT Score at 4000ms delay, F (1,108) = .14, p = .71. A Means Plot described in Figure 6.14, presents how each group performed in the pre-flight test and post-flight test, and with one line representing each group. It can be seen that participants in the Red Bull group had lower scores at 4000ms delay than participants the water group on both tests.

6.10.5 RT Score at 5000ms Delay

A 2 (treatment groups: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 5000ms delay. The ANOVA found no evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = .000, p = .98, η2 = .000. There was no evidence of a difference between groups, F (1,108) = .05, p = .83. In addition, there was no evidence of a significant interaction between groups and RT Score at 5000ms delay, F (1,108) = .15, p = .70. A Means Plot described in Figure 6.15, presents how each group performed in the pre-flight test and post-flight test, and with one line representing each group. It can be seen that two groups of participants performed in similar fashion at 5000ms delay on both tests.

6.10.6 RT Score at 6000ms Delay

A 2 (treatment groups: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 6000ms delay. The ANOVA found no evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = .17, p = .68, η2 = .002. There was no evidence of a difference between groups, F (1,108) = .11, p = .75. In addition, there was no evidence of a significant interaction between groups and RT Score at 6000ms Delay, F (1,108) = .04, p = .85. A Means Plot described in Figure 6.16, presents how each group performed in the pre-flight test and post-flight test, with one line representing each group. Participants in the Red Bull group had slightly lower RT scores at 5000ms delay than participants in the water group on both tests.

6.10.7 RT Score at 7000ms Delay

A 2 (treatment group: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 7000ms delay. The ANOVA found no evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = .70, p = .40, η2 = .006. There was no evidence of a difference between groups, F (1,108) = 1.12, p = .29. In addition, there was no evidence of a significant interaction between groups and RT Score at 7000ms delay, F (1,108) = .75, p = .39. A Means Plot described in Figure 6.17, presents how each group performed in the pre-flight test and post-flight test, and with one line representing each group.

6.10.8 RT Score at 8000ms Delay

A 2 (treatment group: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 8000ms delay. The ANOVA found evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = 4.02, p = .04, η2 = .036. There was no evidence of a difference between groups, F (1,108) = .78, p = .38. In addition, there was no evidence of a significant interaction between groups and RT Score at 8000ms delay, F (1,108) = .29, p = .59. A Means Plot described in Figure 6.18, presents how each group performed in the pre-flight test and post-flight test, with one line representing each group.

6.10.9 RT Score at 9000ms Delay

A 2 (treatment group: water vs. Red Bull) × 2 (test: pre-flight vs. post-flight) mixed model ANOVA was conducted to compare two groups of participants on RT Score at 9000ms delay. The ANOVA found no evidence of a main effect for the within subjects factors – pre-flight vs. post-flight test scores, F (1,108) = .11, p = .75, η2 = .001. There was no evidence of a difference between groups, F (1,108) = 1.29, p = .26. In addition, there was no evidence of a significant interaction between groups and RT Score at 9000ms delay, F (1,108) = 1.89, p = .17. A Means Plot described in Figure 6.19, presents how each group performed in the pre-flight test and post-flight test, with one line representing each group. Participants in the water group had an increasing RT scores while participants in the Red Bull group experienced a deceasing RT scores on both tests.

6.10.10 Summary of 1000ms – 9000ms Delays

RT scores ranging from 1000ms to 9000ms delays in the pre-flight test and post-flight test, with one line representing each group can be seen in Figure 6.20 and Figure 6.21. When compared the treatment groups in the pre-flight test, participants in the Red Bull group responded faster than participants in the water group in all nine delays. In particularly, there was an approximately .01 second difference in RT at 1000ms delay between the two groups. At 2000ms and 3000ms delay, participants in both groups performed in similar fashion. At 4000ms delay, participants in the water group appeared to have a noticeable increased RT scores than other delays.

When compared the treatment groups in the post-flight test, participants in the Red Bull group responded slightly faster than participants in the water group in all nine delays. There was a noticeable difference in RT scores in 1000ms delay. However, this difference was much smaller than the difference in 1000ms delay results in the pre- flight test. Both groups had similar response patterns and shared some close results in the beginning of some delays (e.g., 2000ms delay and 5000ms delay). At 8000ms delay, there was also a noticeable increased RT scores in Red Bull group.