Figure 6. Example of random file naming/coding on Excel and sample blinding file.

A. The “key” is created in Excel by listing the original file names in Column A. The function is added to the adjacent column to produce the randomized “blinding” names. B. After copying the names and selecting “Paste Special: Values”, the key is complete and will not change. From there, the respective file names are renamed with this randomized 4-digit name. C. Finally, the files are sorted alphabetically by 4-digit name. When scoring the videos, follow this alphabetized order to shuffle the videos for blinded analyses.