“…Whilst most studies examined a broad range of ages (about 2 to 11 years), nine had a narrow age range of two or three years [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ]. With respect to methodology, four studies were descriptive [ 29 , 31 , 32 , 33 ], ten were content analysis [ 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 ], five were quasi-experimental [ 9 , 44 , 45 , 46 , 47 ], nine were experimental [ 22 , 23 , 27 , 28 , 30 , 48 , 49 , 50 , 51 ] and seven were correlational studies [ 24 , 25 , 26 , 52 , 53 , 54 , 55 ].…”