The Effects of Reusing Written Test Items: A Study Using the Rasch Model

Table 1

Mean and standard deviation of item easiness parameter.

	M/SD	Min/Max	𝑁
Item easiness parameter data matrix (a)	−0.06/1.17	−2.95/2.98	33
Item easiness parameter data matrix (b)	0.0012/1.33	−2.95/3.32	50
First use (items)	−0.52/1.23	−2.95/1.46	15
Second use (items)	0.13/1.68	−2.66/3.32	15