A new tool for assessing short debriefings after immersive simulation: validity of the SHORT scale

BMC Medical Education

Table 2 Variance by source

Variance components	Sum of squares	df	Mean square	Corrected variance	%^a
R	0.136	1	0.136	0.000	0.0
I	28.045	5	5.609	0.094	12.0
B	75.114	10	7.511	0.252	32.1
O:B	16.750	11	1.523	0.106	13.5
R × I	1.091	5	0.218	0.002	0.2
R × B	1.947	10	0.195	−0.005	0.0
R × O:B	2.750	11	0.250	0.042	5.3
I × B	29.205	50	0.584	0.102	13.0
I × O:B	10.250	55	0.186	0.000	0.0
R × I × B	8.826	50	0.177	−0.005	0.0
R × I × O:B, e^b	10.250	55	0.186	0.186	23.8

^aProportion of corrected variance (i.e., percentage of total variance in the score introduced by each facet), when negative variances are rounded to 0
^bThis source of variance includes variance linked to the interaction of all the facets (R × I × O:B), as well as the unidentified residual variance (e). See text for further details

ISSN: 1472-6920