Note

Read more about block average analysis on the Brainstorm documentation website.

Block average analysis

Import into database

• Right-click on the “Hb [Topo]” file and select “Import in database”.

• Check the “Use events” box in the “Events selection” panel.

• Select the event of interest marking the start of the block.

• Specify your epoch time, e.g. -8000 to 42000 milliseconds.

• Check the “Remove DC offset” box in the “Pre-processing” panel.

• Specify the time range for the baseline, e.g. -8000 to -40 milliseconds.

• Click “Import”.

Average across trials

• Drag the new file(s), which are named after the event label you selected above, into the processes box.

• Click “Run”.

• From the menu, select “Average” > “Average files”.

• Select “By trial group (folder average)” in the group files radio-list.

• Select “Arithmetic average + Standard deviation” from the function radio-list.

Now we’re all set

• Click “Run”

• Once the processes have completed, check the “Report” window for any further information, warnings and errors.

• Also, ALWAYS visually inspect the output files!