Fig. 4.

ezBIDS events conversion process. Once users have uploaded their task events timing files, ezBIDS performs a backend process to extract the column names based on the format of the uploaded files. The columns are then presented in a series of dropdown keys, enabling the user to specify which column name pertains to the BIDS task events columns. For time-based columns (e.g., onset), the user may specify “seconds” or “milliseconds” to note the unit of time for the recorded columns data. As BIDS requires time-based data to be in seconds, ezBIDS will convert data from millisecond to seconds, if so specified. Once the user has finished, ezBIDS applies the changes, converts the file format to TSV, and links the events files to the corresponding functional BOLD files by matching the sub, (ses, if applicable), task, and run entity labels. If ezBIDS cannot determine this link, unique random entity label values are provided (e.g., sub-001), which the user would then be able to edit. To enable greater accuracy in linkage, it is recommended that users specify these entity labels in the log file paths or as explicit column names.