Table 1.
The coefficients of each subgroup for the vocabulary test and the relevant formula across grades.
| Grades | C1 | C2 | C3 | C4 | C5 | C6 | C7 | C8 | C9 | C10 | Constant |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Grade 2 | 12.12 | 6.89 | 5.50 | 4.71 | 4.63 | 4.67 | 5.10 | 5.59 | 6.63 | 8.70 | — |
| Grade 3 | 17.2 | 10.15 | 8.56 | 7.72 | 7.21 | 7.46 | 7.92 | 8.14 | 10.33 | 14 | — |
| Grade 4 | 17 | 11.38 | 9.30 | 8.59 | 8.43 | 8.47 | 8.78 | 9.65 | 11.73 | 16.20 | 449 |
| Grade 5 | 17.39 | 12.45 | 10.2 | 9.06 | 9.17 | 9.18 | 9.33 | 10.25 | 12.41 | 16.67 | 989 |
| Grade 6 | 16.29 | 11.64 | 9.50 | 8.54 | 8.21 | 8.10 | 8.32 | 9.58 | 11.71 | 16.67 | 1305 |
| Formula | Estimation of vocabulary size = C1*a1+ C2*a2+ C3*a3+ C4*a4+ C5*a5+ C6*a6+ C7*a7+ C8*a8+ C9*a9+C10*a10+Constant size = C1*a1 + C2*a2 + C3*a3 + C4*a4 + C5*a5 + C6*a6 + C7*a7 + C8*a8 + C9*a9 + C10*a10 + Constant | ||||||||||
Note. C1–C10 represent relevant coefficient in each condition; a1–a10 mean the number of correct response in each subgroup.