An IERI – International Educational Research Institute Journal
Table 4 Standard Deviations of Different Factors of Analytical Decisions for Trend Estimates in PISA Mathematics Obtained from a Variance Component Analysis
Source of variance | 2003-2006\(^{\mathrm{a}}\) | 2006-2009\(^{\mathrm{b}}\) | 2009-2012\(^{\mathrm{c}}\) | |
|---|---|---|---|---|
1 | Country | 7.28 | 11.51 | 8.96 |
2 | Sample | 0.14 | 0.12 | 0.43 |
3 | Calibration | 0.00 | 0.36 | 0.47 |
4 | Items | 0.46 | 0.00 | 2.27 |
5 | Estimation | 0.00 | 0.00 | 0.00 |
6 | Sample:country | 0.00 | 0.00 | 0.00 |
7 | Calibration:country | 0.14 | 0.03 | 0.29 |
8 | Items:country | 2.59 | 2.04 | 4.10 |
9 | Estimation:country | 0.00 | 0.16 | 0.12 |
10 | Sample:calibration | 0.00 | 0.11 | 0.07 |
11 | Sample:items | 0.10 | 0.04 | 1.04 |
12 | Estimation:sample | 0.00 | 0.00 | 0.00 |
13 | Items:calibration | 0.00 | 0.19 | 0.00 |
14 | Estimation:calibration | 0.00 | 0.00 | 0.29 |
15 | Estimation:items | 0.11 | 0.33 | 0.02 |
16 | Sample:calibration:country | 0.10 | 0.00 | 0.00 |
17 | Sample:items:country | 0.25 | 0.20 | 0.20 |
18 | Estimation:sample:country | 0.00 | 0.00 | 0.00 |
19 | Items:calibration:country | 0.15 | 0.00 | 0.00 |
20 | Estimation:calibration:country | 0.09 | 0.08 | 0.23 |
21 | Estimation:items:country | 0.23 | 0.00 | 1.02 |
22 | Sample:items:calibration | 0.09 | 0.02 | 0.03 |
23 | Estimation:sample:calibration | 0.11 | 0.08 | 0.11 |
24 | Estimation:sample:items | 0.10 | 0.01 | 0.10 |
25 | Estimation:items:calibration | 0.08 | 0.13 | 0.23 |
26 | Residual | 0.55 | 0.54 | 0.58 |