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1.
Figure 2

Figure 2. Average time-on-task slope by allele group.. From: Dopaminergic Polymorphisms Associated with Time-on-Task Declines and Fatigue in the Psychomotor Vigilance Test.

Means and standard errors for reciprocal reaction time slope in each allele group. * represents p<.05. Yellow bars represent allele groups thought to have greater dopamine availability.

Julian Lim, et al. PLoS One. 2012;7(3):e33767.
2.
Figure 4

Figure 4. Average subjective change in energy by allele group.. From: Dopaminergic Polymorphisms Associated with Time-on-Task Declines and Fatigue in the Psychomotor Vigilance Test.

Means and standard errors for average subjective energy change in each allele group. * represents p<.05. Yellow bars represent allele groups thought to have greater dopamine availability.

Julian Lim, et al. PLoS One. 2012;7(3):e33767.
3.
Figure 1

Figure 1. Inter-session reliability of time-on-task slope.. From: Dopaminergic Polymorphisms Associated with Time-on-Task Declines and Fatigue in the Psychomotor Vigilance Test.

Time-on-task slope is significantly correlated across two test sessions spaced one week apart (ICC1,1 = .54, p<.01). Subjects show a tendency to perform slightly worse in the second session.

Julian Lim, et al. PLoS One. 2012;7(3):e33767.
4.
Figure 3

Figure 3. Average reaction time curves by allele group for DAT1 and COMT.. From: Dopaminergic Polymorphisms Associated with Time-on-Task Declines and Fatigue in the Psychomotor Vigilance Test.

Curves were plotted using predicted values calculated from average parameters A, T1 and T2 for each allele group. The thinner dotted curves represent the mean ± one standard error. Note that the curvature of the trends is only slight despite the use of an exponential equation; this is due to the bimodality of T1, for which large values cause the curve to approach linearity. Panel A: COMT allele groups. Panel B: DAT1 allele groups.

Julian Lim, et al. PLoS One. 2012;7(3):e33767.

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