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Suggested Citation:
5 6 7 8 9
grade
13,0
13,5
14,0
14,5
15,0
15,5
16,0
16,5
mean score
2.87
0.11
0.42
2.26
0.97
1.55
14.09***
0.11
0.13
0.10
5.12*
0.98
0.04
1.65
0.25
4.97***
4.61**
3.89**
1.78
1.71
2.42
0.05
0.03
0.87
0.00
0.80
0.49
0.28
0.60
0.01
2.58*
1.60
0.70
0.71
0.97
2.20
2.94*
1.03
1.61
2.35
0.32
0.03
0.21
0.79
0.17
0.00
0.32
0.06
0.23
1.38
0.44
1.29
1.23
0.57
4.32**
1.14
3.56**
1.96
0.81
1.97
0.58
0.17
1.91
0.06
0.07
0.72
3.30*
1.63
0.51
0.69
0.66
2.89*
0.45
0.35
0.89
0.92
3.75**
1.04
0.82
2.44*
identif ication of birds
reproduct ion of birds
f ood of birds
birds senses
migrat ory of birds
5 6 7 8 9
grade
0
1
2
3
4
5
6
7
8
mean s core