Information Plot

In the Item Analysis report, the Information Plot section contains a plot of the overall information curve, which is constructed by summing the individual item information curves. The information plot provides insight into the appropriate ability levels that the test is able to measure. Figure 12.6 describes a test with items that are appropriate for assessing individuals with average to low levels of the ability more so than individuals with high levels of ability. This plot is initially closed.

Figure 12.6 Information Plot