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T-tests
--------------------------------------
.. image:: _images/t_tests.png
:align: right
* **data**: matrix
* **symmetric matrix**: check to extract the upper right matrix's elements, uncheck to extract all elements
* **data**: volume
* **mask**: could be whole brain mask or gray matter mask.
* **filetype**: filetype
* **data dir**: Input directories of matrices.
* **grouping info**:
* **stat type**: one sample t-test, two sample t-test and paired t-test.
* **groups**:
* for two sample t-test, e.g. SZ,NC -> will do two-sample t-test for SZ and NC
* for paired t-test, e.g. SZ,NC -> will do paired t-test for SZ and NC
* for one sample t-test, e.g. SZ;NC -> will do one-sample t-test for both SZ and NC group
* **table**: A comma-seperated values (csv) table, which is used for parsing subject names and covariates. The parsed names/ids will be matched to search results conducted with datadir and filetype. Before matching, BRANT will remove specified strings.
* For one and two sample t-tests:
======= ======= ======== =====
name group filter age
======= ======= ======== =====
subj1 SZ center1 28
subj2 SZ center1 27
subj3 NC center1 30
subj4 NC center2 25
======= ======= ======== =====
* For paired t-test, another column of paired_t_idx is required to specify paired subjects in each group:
====== ======= ======== ===== =============
name group filter age paired_t_idx
====== ======= ======== ===== =============
subj1 stage1 center1 28 1
subj2 stage1 center1 27 2
subj3 stage2 center1 30 1
subj4 stage2 center2 25 2
====== ======= ======== ===== =============
* **string removal***: optional. remove strings from search results parsed by id index.
* **regressors***: optional. title of regressors which will be regressed out before statistical analysis. e.g. age
* **filter***: optional. use the control for subject in different state or center, fill in center1 here and subject4 won't be included in the analysis.
* **discard subjects without info**: when checked, if subjects' information are not found in the table, a warning message will be shown; when unchecked, an error message will be shown.
* **Multiple comparison correction methods (voxel-wise)**
* **threshold**: the level of MULCC
* **fdrID**: false discovery rate (independent input)
* **fdrN**: false discovery rate (inputs not independent)
* **bonf**: Bonferroni correction for family wise error rate
* **out dir**: output directory for saving results.
- **Buttons**:
- **S**: Save parameters of the current panel to a :file:`\*.mat` file. The :file:`\*.mat` can be further loaded for the panel or be used in a script processing.
- **L**: Load parameters from :file:`\*.mat` for the current panel.
- **?**: Help information.