Content Validity Index
From the responses collected from higher surgical trainees, 20 items (69.0%) had a CVI of 1, 7 items (24.1%) had a CVI of 0.86, 1 item (3.4%) had a CVI of 0.71 and 1 item (3.4%) had a CVI of 0.43. The critical CVI cut-off for a panel of seven is 0.83 (11). Item “The theatre staff are friendly ” with a CVI of 0.71 and item 29 “I feel that I can freely give preference to if music is played in theatre ” with a CVI of 0.43 were removed. 27 items which have reached the cut-off CVI from trainee responses were included at the end of this validation stage. From the responses collected from consultant trainers, 27 items reached the cut-off CVI of 0.83. Item “I get bleeped during operations ” had a CVI of 0.71 and item “I can comfortably express my preference to if music is played in theatre ” had a CVI of 0.43.