Table 2.

Item-Level Psychometric Properties of the FIM-MDS Item Bank.

	FIM-MDS Item Bank
Person reliability (Cronbach’s α)	0.98
Person separation index	4.51
Person strata	6.3
Person ability	M = 0.49, SD = 0.20 Minimum = −3.57, Maximum = 4.21 (range = 7.78)
Item difficulty	M = 0, SD = 0.05 Minimum = −1.50, Maximum = 1.26 (range = 2.76)
Misfitting items (both high and low fit)	42.3% (11/26 items)
Floor effect	0% (0/371 persons)
Ceiling effect	0% (0/371 persons)

Note. n = 371. FIM = Functional Independence Measure; MDS = mínimum data set.