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help > Comparison of two sessions with different conditions
Feb 13, 2018 09:02 AM | Takeshi Atsumi - Research Institute of NRCD
Comparison of two sessions with different conditions
Dear gPPI experts,
I'm trying to perform PPI analysis with gPPI toolbox. I want to compare two sessions with different conditions in a block-design experiment.
On the basis of 1st level analysis, I used "create_sphere_image" function to extract VOI targeting one region, instead of using the implemented GUI function ("eigenvariate" button). Like this:
create_sphere_image('SPM.mat', [49 49 -9], {'VOI_49_49_-9'},[6])
Then I made P parameters like this:
subject: 'S5'
directory: 'D:\S5 \gPPI'
VOI: 'D:\S5\gPPI\VOI_49_49_-9_mask.nii'
VOImin: 10
ConcatR: 0
Estimate: 1
contrast: 0
extract: 'eig'
Tasks: {'0' 'Task1' 'Task2'}
Weights: []
analysis: 'psy'
method: 'cond'
CompContrasts: 1
Weighted: 0
Contrasts: [1×1 struct]
equalroi: 0
FLmask: 1
Region: 'ROI_49_49_-9'
P.Contrasts is:
Prefix: [1×1 struct] % Left: {'Sn(1)'}, Right: {'Sn(2)'}
left: {'Task1}
right: {'Task2'}
STAT: 'T'
Weighted: 0
MinEvents: 4
name: 'Task1-Task2'
"ppi_checkstruct" seemed went well, but the PPPI(P) failed. Like this:
Log File: S5_PPPI_2_13_2018_8.log
PPPI Version: 13.1.4-17-2014
Parameters used:
Processing subject: S5
VOI file : D:\S5\gPPI\VOI_49_49_-9_mask.nii
Output file will be: S5_ROI_49_49_-9_session#_cond_PPI_regressors.txt
Contrast : No adjustment
Analysis : Psychophysiological Interactions
Extraction : eigenvariate
Tasks : _0_Task1_Task2
Method : Condition Specific
VOI has 58 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space
VOI has 32 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space. This is in the the same space as the input data and functional mask.
VOI has 58 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space
VOI has 32 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space. This is in the the same space as the input data and functional mask.
Generate Contrast Vectors
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Generate Contrasts
PPI Contrasts were not estimated for some reason.
How should I resolve this problem?
Please let me know if you need more information or any files to help identify the problem.
Best regards,
Takeshi
I'm trying to perform PPI analysis with gPPI toolbox. I want to compare two sessions with different conditions in a block-design experiment.
On the basis of 1st level analysis, I used "create_sphere_image" function to extract VOI targeting one region, instead of using the implemented GUI function ("eigenvariate" button). Like this:
create_sphere_image('SPM.mat', [49 49 -9], {'VOI_49_49_-9'},[6])
Then I made P parameters like this:
subject: 'S5'
directory: 'D:\S5 \gPPI'
VOI: 'D:\S5\gPPI\VOI_49_49_-9_mask.nii'
VOImin: 10
ConcatR: 0
Estimate: 1
contrast: 0
extract: 'eig'
Tasks: {'0' 'Task1' 'Task2'}
Weights: []
analysis: 'psy'
method: 'cond'
CompContrasts: 1
Weighted: 0
Contrasts: [1×1 struct]
equalroi: 0
FLmask: 1
Region: 'ROI_49_49_-9'
P.Contrasts is:
Prefix: [1×1 struct] % Left: {'Sn(1)'}, Right: {'Sn(2)'}
left: {'Task1}
right: {'Task2'}
STAT: 'T'
Weighted: 0
MinEvents: 4
name: 'Task1-Task2'
"ppi_checkstruct" seemed went well, but the PPPI(P) failed. Like this:
Log File: S5_PPPI_2_13_2018_8.log
PPPI Version: 13.1.4-17-2014
Parameters used:
Processing subject: S5
VOI file : D:\S5\gPPI\VOI_49_49_-9_mask.nii
Output file will be: S5_ROI_49_49_-9_session#_cond_PPI_regressors.txt
Contrast : No adjustment
Analysis : Psychophysiological Interactions
Extraction : eigenvariate
Tasks : _0_Task1_Task2
Method : Condition Specific
VOI has 58 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space
VOI has 32 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space. This is in the the same space as the input data and functional mask.
VOI has 58 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space
VOI has 32 voxels in 2.200000e+00x2.200000e+00x3.200000e+00 space. This is in the the same space as the input data and functional mask.
Generate Contrast Vectors
Warning: Missing conditions!!! Invalid Contrast
Invalid Contrast
Generate Contrasts
PPI Contrasts were not estimated for some reason.
How should I resolve this problem?
Please let me know if you need more information or any files to help identify the problem.
Best regards,
Takeshi
Threaded View
Title | Author | Date |
---|---|---|
Takeshi Atsumi | Feb 13, 2018 | |
Donald McLaren | Mar 6, 2018 | |
Takeshi Atsumi | Mar 8, 2018 | |
Donald McLaren | Mar 8, 2018 | |
Donald McLaren | Feb 15, 2018 | |
Takeshi Atsumi | Feb 16, 2018 | |
Takeshi Atsumi | Feb 16, 2018 | |
Donald McLaren | Feb 16, 2018 | |
Takeshi Atsumi | Feb 17, 2018 | |