Martin Caust

Selected graphs 8.19

Figure 8.19 1997 English-Mean of Teacher assessments (Year level means equated) and Test Model assessments compared by age within Year level

Fig 8.19

Note: When Figure 8.18 is viewed with each Year level group identified, data sets (teacher assessments and test assessments) provide very similar patterns, with both sources displaying similar tails for over-age students.
Caution: The test data set is 'artificial' for more than half of the Year levels (1, 2, 4, 6, 8). Many more 'cases' are provided for the test data (red squares) leading to much smoother paths. The trajectories with age have been 'equated': the tails are 'on their own' but confirm that teachers observe the performance of older students as effectively as thetest.

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