The model is:
Group: two groups of subjects (ones that had a saline infusion and ones that had an insulin infusion)
Task: viewing of HiFat, LowFat or NonFood pictures
Session (Time Effect): one is average of runs 1-4 while two is average of runs 5-8


Below is my output while running LME model with covariates:

Loading required package: nlme
Loading required package: contrast
Loading required package: Design
Loading required package: Hmisc
Loading required package: survival
Loading required package: splines

Attaching package: 'Hmisc'


The following object(s) are masked from package:survival :

untangle.specials


The following object(s) are masked from package:base :

format.pval,
round.POSIXt,
trunc.POSIXt,
units

Design library by Frank E Harrell Jr

Type library(help='Design'), ?DesignOverview, or ?Design.Overview')
to see overall documentation.


Attaching package: 'Design'


The following object(s) are masked from package:Hmisc :

strgraphwrap


The following object(s) are masked from package:survival :

Surv


Attaching package: 'contrast'


The following object(s) are masked from package:Design :

contrast


++++++++++++++++++++++++++++++++++++++++++++++++++++
***** Summary information of data structure *****
34 subjects : ta0042 ta0062 ta0098 ta0122 ta0130 ta0153 ta0185 ta0698 ta0729 ta1816 ta1848 ta1951 ta1987 ta2085 ta2195 ta2261 ta2299 ta2421 ta2569 ta2708 ta2752 ta2785 ta2820 ta2851 ta2956 ta2997 ta3084 ta3197 ta7135 ta7171 ta7256 ta7277 ta7315 ta7355
204 response values
204 centered values for numeric variable Wanting : 3.93 0.07 -0.67 0.54 1.75 2.97 -2.1 0.47 -1.57 4.18 3.65 1.15 -2.89 -2.68 3.61 2.25 2.23 0.19 2.72 -0.64 -0.11 0.85 0.88 -0.35 0.68 0.07 -0.68 2.72 0.92 0.29 -2.89 -2.25 2 -1.21 0.44 2.26 -0.6 -1.35 -2.21 -0.67 -1.97 -2.67 -0.32 -1.6 -1.89 -2.25 -2.07 -1.68 -2.75 -2.78 -0.32 -0.1 1.99 -0.08 3.11 2.74 -0.43 -1.28 3.36 -0.21 0.92 0.86 -2.78 1.68 0.54 -1.71 1.18 0.54 2 0.47 2.44 1.71 0.15 -0.85 0.43 -0.43 -0.32 1.82 -1.46 2.4 0.15 -1.19 -0.93 1.11 1.65 -1.39 -1.09 0.91 -2.32 -2.85 -0.35 -0.89 -2.75 -1.18 -2.32 -1.21 -1.5 -2.21 -2.1 1.29 0.29 -2.64 3.82 2.22 1.59 2.5 2.93 -1.78 -1.1 -1.28 -1.85 4.5 2.9 0.82 -2.89 -2.71 3.82 3.86 1.9 -1.21 2.4 0.86 2.25 2.04 1 -2.43 2.43 -1.82 -0.39 2.33 0.72 -0.03 -2.89 -2.68 2.04 1.75 1.04 3.15 -0.78 -1.18 -2.89 -0.82 -1.04 -2.63 -1.43 -2.18 -2.21 -2.64 -2.39 -2.14 -2.89 -2.75 -0.6 1.04 1.55 -1.89 4.61 3.32 -1.5 0.36 2.65 1.02 1.15 0.5 -2.75 2.75 -0.89 0.57 3.93 1.86 2.32 1.47 0.11 2.21 -1.1 1.07 0.97 -0.25 0.04 2.36 -1.64 2.57 -0.68 0.61 0.79 0.75 1.47 -0.1 -2.39 -0.13 -2.85 -2.75 -1.14 -1.34 -2.89 -0.89 -2.57 -2.07 -2.1 -2 -1.82 0.9 0.07 -2.82
204 centered values for numeric variable Hunger : 0.55 -0.45 -0.45 -1.45 -3.45 -0.45 -3.45 -1.45 -1.95 2.05 2.05 -0.45 -3.45 -2.95 -1.95 -1.45 1.05 -0.95 0.55 -0.45 -0.45 -1.45 -3.45 -0.45 -3.45 -1.45 -1.95 2.05 2.05 -0.45 -3.45 -2.95 -1.95 -1.45 1.05 -0.95 0.55 -0.45 -0.45 -1.45 -3.45 -0.45 -3.45 -1.45 -1.95 2.05 2.05 -0.45 -3.45 -2.95 -1.95 -1.45 1.05 -0.95 1.05 4.55 -3.45 -0.95 3.55 -0.95 0.05 -2.95 -2.95 -0.95 -3.45 -2.45 0.05 -0.95 1.05 -0.45 1.05 4.55 -3.45 -0.95 3.55 -0.95 0.05 -2.95 -2.95 -0.95 -3.45 -2.45 0.05 -0.95 1.05 -0.45 1.05 4.55 -3.45 -0.95 3.55 -0.95 0.05 -2.95 -2.95 -0.95 -3.45 -2.45 0.05 -0.95 1.05 -0.45 2.55 3.05 2.55 0.55 0.05 -1.95 -1.95 -1.95 2.05 3.55 3.05 0.05 -3.45 -3.45 -1.45 2.55 0.05 -1.45 2.55 3.05 2.55 0.55 0.05 -1.95 -1.95 -1.95 2.05 3.55 3.05 0.05 -3.45 -3.45 -1.45 2.55 0.05 -1.45 2.55 3.05 2.55 0.55 0.05 -1.95 -1.95 -1.95 2.05 3.55 3.05 0.05 -3.45 -3.45 -1.45 2.55 0.05 -1.45 2.55 4.55 -2.45 1.05 3.05 2.05 2.05 -0.45 0.05 3.05 -3.45 1.55 3.55 2.55 2.05 1.55 2.55 4.55 -2.45 1.05 3.05 2.05 2.05 -0.45 0.05 3.05 -3.45 1.55 3.55 2.55 2.05 1.55 2.55 4.55 -2.45 1.05 3.05 2.05 2.05 -0.45 0.05 3.05 -3.45 1.55 3.55 2.55 2.05 1.55
2 levels for factor Session : one two
3 levels for factor Task : HiFat LowFat NonFood
2 levels for factor Group : Eugly Saline
38 post hoc tests

Tabulation of subjects against all categorical variables
~~~~~~~~~~~~~~
Subj vs Session:

one two
ta0042 3 3
ta0062 3 3
ta0098 3 3
ta0122 3 3
ta0130 3 3
ta0153 3 3
ta0185 3 3
ta0698 3 3
ta0729 3 3
ta1816 3 3
ta1848 3 3
ta1951 3 3
ta1987 3 3
ta2085 3 3
ta2195 3 3
ta2261 3 3
ta2299 3 3
ta2421 3 3
ta2569 3 3
ta2708 3 3
ta2752 3 3
ta2785 3 3
ta2820 3 3
ta2851 3 3
ta2956 3 3
ta2997 3 3
ta3084 3 3
ta3197 3 3
ta7135 3 3
ta7171 3 3
ta7256 3 3
ta7277 3 3
ta7315 3 3
ta7355 3 3

~~~~~~~~~~~~~~
Subj vs Task:

HiFat LowFat NonFood
ta0042 2 2 2
ta0062 2 2 2
ta0098 2 2 2
ta0122 2 2 2
ta0130 2 2 2
ta0153 2 2 2
ta0185 2 2 2
ta0698 2 2 2
ta0729 2 2 2
ta1816 2 2 2
ta1848 2 2 2
ta1951 2 2 2
ta1987 2 2 2
ta2085 2 2 2
ta2195 2 2 2
ta2261 2 2 2
ta2299 2 2 2
ta2421 2 2 2
ta2569 2 2 2
ta2708 2 2 2
ta2752 2 2 2
ta2785 2 2 2
ta2820 2 2 2
ta2851 2 2 2
ta2956 2 2 2
ta2997 2 2 2
ta3084 2 2 2
ta3197 2 2 2
ta7135 2 2 2
ta7171 2 2 2
ta7256 2 2 2
ta7277 2 2 2
ta7315 2 2 2
ta7355 2 2 2

~~~~~~~~~~~~~~
Subj vs Group:

Eugly Saline
ta0042 6 0
ta0062 6 0
ta0098 6 0
ta0122 6 0
ta0130 6 0
ta0153 6 0
ta0185 6 0
ta0698 6 0
ta0729 6 0
ta1816 6 0
ta1848 6 0
ta1951 6 0
ta1987 6 0
ta2085 6 0
ta2195 6 0
ta2261 6 0
ta2299 6 0
ta2421 6 0
ta2569 0 6
ta2708 0 6
ta2752 0 6
ta2785 0 6
ta2820 0 6
ta2851 0 6
ta2956 0 6
ta2997 0 6
ta3084 0 6
ta3197 0 6
ta7135 0 6
ta7171 0 6
ta7256 0 6
ta7277 0 6
ta7315 0 6
ta7355 0 6
***** End of data structure information *****
++++++++++++++++++++++++++++++++++++++++++++++++++++

Reading input files now...

Beta ~ Wanting * Hunger + Session * Task * Group
[1] "Great, test run passed at voxel (20, 36, 30)!"
[1] "Start to compute 61 slices along Z axis. You can monitor the progress"
[1] "and estimate the total run time as shown below."
[1] "04/02/15 15:19:07.378"
Z slice 1 done: 04/02/15 15:19:10.597
Z slice 2 done: 04/02/15 15:19:11.009
Z slice 3 done: 04/02/15 15:19:11.394 .........