This example of the evolution of the vocabulary of children can be found
in Bock (1975).
Data are drawn from test results on file in the Records Office of the
Laboratory School of the University of Chicago.
They consist of scores, obtained from a cohort of pupils from the eighth
through eleventh grade levels, on alternative forms of the vocabulary
section of the Coorperative Reading Test. It provides the
following scaled scores shown for the sample of 64 subjects (the origin and
units are fixed arbitrarily).
|
Grade |
|
Subjects |
8 |
9 |
10 |
11 |
Mean |
|
1 |
1.75 |
2.60 |
3.76 |
3.68 |
2.95 |
|
2 |
0.90 |
2.47 |
2.44 |
3.43 |
2.31 |
|
3 |
0.80 |
0.93 |
0.40 |
2.27 |
1.10 |
|
4 |
2.42 |
4.15 |
4.56 |
4.21 |
3.83 |
|
4 |
 1.31 |
1.31 |
0.66 |
2.22 |
1.38 |
|
6 |
1.56 |
1.67 |
0.18 |
2.33 |
0.66 |
|
7 |
1.09 |
1.50 |
0.52 |
2.33 |
1.36 |
|
8 |
1.92 |
1.03 |
0.50 |
3.04 |
0.66 |
|
9 |
1.61 |
0.29 |
0.73 |
3.24 |
0.66 |
|
10 |
2.47 |
3.64 |
2.87 |
5.38 |
3.59 |
|
11 |
0.95 |
0.41 |
0.21 |
1.82 |
0.37 |
|
12 |
1.66 |
2.74 |
2.40 |
2.17 |
2.24 |
|
13 |
2.07 |
4.92 |
4.46 |
4.71 |
4.04 |
|
14 |
3.30 |
6.10 |
7.19 |
7.46 |
6.02 |
|
15 |
2.75 |
2.53 |
4.28 |
5.93 |
3.87 |
|
16 |
2.25 |
3.38 |
5.79 |
4.40 |
3.96 |
|
17 |
2.08 |
1.74 |
4.12 |
3.62 |
2.89 |
|
18 |
0.14 |
0.01 |
1.48 |
2.78 |
1.10 |
|
19 |
0.13 |
3.19 |
0.60 |
3.14 |
1.77 |
|
20 |
2.19 |
2.65 |
3.27 |
2.73 |
2.71 |
|
21 |
0.64 |
1.31 |
0.37 |
4.09 |
0.44 |
|
22 |
2.02 |
3.45 |
5.32 |
6.01 |
4.20 |
|
23 |
2.05 |
1.80 |
3.91 |
2.49 |
2.56 |
|
24 |
1.48 |
0.47 |
3.63 |
3.88 |
2.37 |
|
25 |
1.97 |
2.54 |
3.26 |
5.62 |
3.35 |
|
26 |
1.35 |
4.63 |
3.54 |
5.24 |
3.69 |
|
27 |
0.56 |
0.36 |
1.14 |
1.34 |
0.39 |
|
28 |
0.26 |
0.08 |
1.17 |
2.15 |
0.92 |
|
29 |
1.22 |
1.41 |
4.66 |
2.62 |
2.47 |
|
30 |
1.43 |
0.80 |
0.03 |
1.04 |
0.09 |
|
31 |
1.17 |
1.66 |
2.11 |
1.42 |
1.00 |
|
32 |
1.68 |
1.71 |
4.07 |
3.30 |
2.69 |
|
33 |
0.47 |
0.93 |
1.30 |
0.76 |
0.63 |
|
34 |
2.18 |
6.42 |
4.64 |
4.82 |
4.51 |
|
35 |
4.21 |
7.08 |
6.00 |
5.65 |
5.73 |
|
36 |
8.26 |
9.55 |
10.24 |
10.58 |
9.66 |
|
37 |
1.24 |
4.90 |
2.42 |
2.54 |
2.78 |
|
38 |
5.94 |
6.56 |
9.36 |
7.72 |
7.40 |
|
39 |
0.87 |
3.36 |
2.58 |
1.73 |
2.14 |
|
40 |
0.09 |
2.29 |
3.08 |
3.35 |
2.15 |
|
41 |
3.24 |
4.78 |
3.52 |
4.84 |
4.10 |
|
42 |
1.03 |
2.10 |
3.88 |
2.81 |
2.45 |
|
43 |
3.58 |
4.67 |
3.83 |
5.19 |
4.32 |
|
44 |
1.41 |
1.75 |
3.70 |
3.77 |
2.66 |
|
45 |
0.65 |
0.11 |
2.40 |
3.53 |
1.29 |
|
46 |
1.52 |
3.04 |
2.74 |
2.63 |
2.48 |
|
47 |
0.57 |
2.71 |
1.90 |
2.41 |
1.90 |
|
48 |
2.18 |
2.96 |
4.78 |
3.34 |
3.32 |
|
49 |
1.10 |
2.65 |
1.72 |
2.96 |
2.11 |
|
50 |
0.15 |
2.69 |
2.69 |
3.50 |
2.26 |
|
51 |
1.27 |
1.26 |
0.71 |
2.68 |
0.85 |
|
52 |
2.81 |
5.19 |
6.33 |
5.93 |
5.06 |
|
53 |
2.62 |
3.54 |
4.86 |
5.80 |
4.21 |
|
54 |
0.11 |
2.25 |
1.56 |
3.92 |
1.96 |
|
55 |
0.61 |
1.14 |
1.35 |
0.53 |
0.91 |
|
56 |
2.19 |
0.42 |
1.54 |
1.16 |
0.02 |
|
57 |
1.55 |
2.42 |
1.11 |
2.18 |
1.82 |
|
58 |
0.04 |
0.50 |
2.60 |
2.61 |
1.42 |
|
59 |
3.10 |
2.00 |
3.92 |
3.91 |
3.24 |
|
60 |
0.29 |
2.62 |
1.60 |
1.86 |
1.45 |
|
61 |
2.28 |
3.39 |
4.91 |
3.89 |
3.62 |
|
62 |
2.57 |
5.78 |
5.12 |
4.98 |
4.61 |
|
63 |
2.19 |
0.71 |
1.56 |
2.31 |
0.60 |
|
64 |
0.04 |
2.44 |
1.79 |
2.64 |
1.71 |
|
Mean |
1.14 |
2.54 |
2.99 |
3.47 |
2.53 |