diff --git a/narps_open/data/participants.py b/narps_open/data/participants.py
index 835e834f..b0d6213e 100644
--- a/narps_open/data/participants.py
+++ b/narps_open/data/participants.py
@@ -51,9 +51,9 @@ def get_participants_subset(nb_participants: int = 108) -> list:
     return get_all_participants()[0:nb_participants]
 
 def get_group(group_name: str) -> list:
-    """ Return a list containing all the participants inside the group_name group
+    """ Return a list containing all the participants inside the group_name group """
 
-        Warning : the subject ids are return as written in the participants file (i.e.: 'sub-*')
-    """
     participants = get_participants_information()
-    return participants.loc[participants['group'] == group_name]['participant_id'].values.tolist()
+    group = participants.loc[participants['group'] == group_name]['participant_id'].values.tolist()
+
+    return [p.replace('sub-', '') for p in group]
diff --git a/narps_open/pipelines/team_T54A.py b/narps_open/pipelines/team_T54A.py
index 5ab44c35..101133f0 100644
--- a/narps_open/pipelines/team_T54A.py
+++ b/narps_open/pipelines/team_T54A.py
@@ -700,10 +700,10 @@ def get_group_level_analysis_sub_workflow(self, method):
             # Add missing connections
             group_level_analysis.connect([
                 (get_equal_range_subjects, regressors_two_sample, [
-                    ('out_list', 'equal_range_id')
+                    ('out_list', 'equal_range_ids')
                     ]),
                 (get_equal_indifference_subjects, regressors_two_sample, [
-                    ('out_list', 'equal_indifference_id')
+                    ('out_list', 'equal_indifference_ids')
                     ]),
                 (regressors_two_sample, specify_model, [
                     ('regressors', 'regressors'),
diff --git a/tests/data/test_participants.py b/tests/data/test_participants.py
index f36f0a05..eaf313fb 100644
--- a/tests/data/test_participants.py
+++ b/tests/data/test_participants.py
@@ -112,5 +112,5 @@ def test_get_group(mock_participants_data):
         """ Test the get_group function """
 
         assert part.get_group('') == []
-        assert part.get_group('equalRange') == ['sub-002', 'sub-004']
-        assert part.get_group('equalIndifference') == ['sub-001', 'sub-003']
+        assert part.get_group('equalRange') == ['002', '004']
+        assert part.get_group('equalIndifference') == ['001', '003']