“…The number of papers selected was 23 (four papers for lower graders, 7 , 15 , 16 , 17 11 for higher graders, 8 , 14 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 and eight for adults. 5 , 6 , 9 , 27 , 28 , 29 , 30 , 31 Items in most papers could be applied to multiple age categories. All questions in these questionnaires were then translated into Japanese.…”