eelbrain.pipeline.TTestIndependent

class eelbrain.pipeline.TTestIndependent(model, c1, c0, tail=0)[source]

Independent measures t-test (comparing groups of subjects)

Parameters:

model (str) – The model which defines the cells that are used in the test. Can be "group" to compare two groups defined on the pipeline.
c1 (CellArg) – The experimental group. Should be a group name.
c0 (CellArg) – The control group, defined like c1.
tail (int) – Tailedness of the test. 0 for two-tailed (default), 1 for upper tail and -1 for lower tail.

See also

Pipeline.tests

Examples

Sample test definitions, assuming that the experiment has two groups called 'younger' and 'older':

groups = {
    'younger': Group(['S001', 'S002']),
    'older': Group(['S011', 'S012']),
}
tests = {
    'older=younger': TTestIndependent('group', 'older', 'younger'),
    'older>younger': TTestIndependent('group', 'older', 'younger', tail=1),
}