Visuoperceptual Impairment in Children with NF1: From Early Visual Processing to Procedural Strategies

Table 4

RCFT performance distributions within each of the three groups.

RCFT measure	Performance levels^§	NF1; (%); Residual	S; (%); Residual	TD; (%); Residual		Exact
Copy	>-1 SD	6 (33.3) -2.9	13 (76.5) 1.6	13 (72.2) 1.3	9.749	0.038
	<-1 SD	4 (22.2) 0.7	3 (17.6) 0.1	2 (11.1) -0.8
	<-2 SD	8 (44.4) 2.7	1 (5.9) -2.0	3 (16.7) -0.7
Immediate recall	>-1 SD	5 (27.8) -3.3	11 (64.7) 0.6	15 (83.3) 2.6	13.517	0.005
	<-1 SD	6 (33.3) 1.1	5 (29.4) 0.6	2 (11.1) -1.6
	<-2 SD	7 (38.9) 3.0	1 (5.9) -1.6	1 (5.6) -1.6
Delay Recall	>-1 SD	3 (16.7) -3.6	11 (64.7) 1.4	13 (72.2) 2.2	17.924	0.001
	<-1 SD	7 (38.9) 1	6 (35.3) 0.6	3 (16.7) -1.5
	<-2 SD	8 (44.4) 3.4	0 (0.0) -2.4	2 (11.1) -1.0
Recognition	>-1 SD	15 (83.3) 0.7	11 (64.7) -1.5	15 (83.3) 0.7	6.901	0.071
	<-1 SD	3 (16.7) -0.3	6 (35.3) 2.1	1 (5.6) -1.8
	<-2 SD	0 (0.0) -1.0	0 (0) -1.0	2 (11.1) 2.0

Legend. NF1: neurofibromatosis type 1; S: siblings; TD: typically developing children; RCFT: Rey Complex Figure Test. The significant corrected standardized residuals are bolded. ^§Performance levels are represented as follows: >-1 SD: normal, <-1 SD: borderline, <-2 SD: impaired.