A graph with three panels. Each panel shows a scatter diagram with one observer on the horizontal axis and another observer on the veritcal axis.
In Panel 1, Observer 1 is on the horizontal axis, Observer 2 is on the vertical axis. The obvious feature is that there appears to be a verical lower cutoff, Observer 1 has no readings below 6, whereas Observer 2 has readings below 5.
In Panel 2, Observer 1 is on the horizontal axis, Observer 3 is on the vertical axis. The obvious feature is that there appears to be a verical lower cutoff, Observer 1 has no readings below 6, whereas Observer 3 has readings as low as 4. This is very similar to Panel 1.
In Panel 3, Observer 2 is on the horizontal axis, Observer 3 is on the vertical axis. The obvious feature is that there appears to be a triangle of points, with its apex at the top right corner. Points are more widely scattered for low readings.
Back to Measurement in Health and Disease: Observer variation.
This page maintained by Martin Bland.
Last updated: 21 April, 2008.