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Item difficulty.
b i item difficulty, SE standard error.
Figure 2 displays person ability, item difficulty, can-do item difficulty estimates on a Rasch map.
Fig. 2 Person ability, item difficulty, can-do item difficulty estimates on a Rasch map.
The DIF MEASURE is the item difficulty for this class.
From bottom to top, person ability and item difficulty increase.
Item difficulty also had a positive effect on disengagement.
To our knowledge, studies on controlling item difficulty are scarce.
In CAT, item difficulty also plays an important role.
Can the item difficulty be controlled by the investigated factors?
Rasch estimates are indicators of students' ability and item difficulty.
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