Table 4.

Mean scores for Perseverative Errors and Categories Completed in Studies Using the WCST-128.

Perseverative Errors: Number of Incorrect Matches in Sequence, Following the Same Incorrect Criterion
[14]	6	[27]	22.10 (mild TBI) 16.34 (healthy)	[47]	41.7 (mild to severe TBI)
[15]	79 (severe TBI)	[28]	8.4 (mild TBI) 0.08 (neurologically intact)	[49]	6.39 (mild TBI) 26.00 (severe TBI) 18.96 (moderate TBI)
[16]	30 (mild TBI) 30 (severe TBI) 11 (moderate TBI)	[31]	19.76 (mild TBI) 15.67 (healthy)	[39]	6.4 (moderate TBI) 0.5 (healthy)
[23]	19.83 (severe TBI)	[33]	7.40 (moderate TBI) 0.06 (healthy) 31.67 (severe TBI)	[56]	31.32 virtual reality group at baseline 31.60 psychoeducation group at baseline
[24]	15.6 (moderate to severe TBI)	[37]	89.42 raw scores		(mild to moderate TBI)
[25]	10.8 (mild TBI)	[45]	14.1 (severe TBI)
Categories Completed: Number of categories with a sequence of 10 consecutive correct matches
[14]	6	[24]	5 (moderate to severe)	[37]	4.07
[15]	6 (severe TBI)	[31]	4.07 (mild TBI) 4.53 (healthy)	[42]	4.85 controls 4.90/4.12 (mild TBI, good/poor effort) 4.57/4.38 (moderate to severe TBI, good/poor effort) 2.55 diffuse neurological impairment
[16]	3 (mild TBI) 4 (severe TBI) 5 (moderate TBI)	[32]	5.54 (severe TBI)	[43]	3.6/3.6 (moderate to severe TBI, suicide attempt: no/yes) 3.9/4.1 (healthy, suicide attempt: no/yes)
[17]	4.5 (moderate to severe TBI)	[33]	5.35 (moderate TBI) 6.00 (healthy) 3.00 (severe TBI)	[45]	5.1 (severe TBI)
[20]	4.77	[34]	5.17(severe TBI) 5.8 (healthy)	[46]	Weighted mean = 0.354 (mild TBI)
[23]	3.04 (severe TBI)	[36]	4.85 (severe TBI) 5.65 (healthy)	[49]	4.95 (mild TBI) 2.50 (severe TBI) 4.00 (moderate TBI)