Feasibility, reliability, and clinical validity of the Test of Attentional Performance for Children (KiTAP) in Fragile X syndrome (FXS)

Table 2 Feasibility of KiTAP subtests in FXS cohort and MA for ceiling and basal effects^a

Subtest	Performed test^b		Failed retest, n	Performed test/retest, %	MA, years (IQ, points)^c
	n	%			Some fail	All fail	Some ceiling	Most ceiling
Alertness	36	100	0	100	NA	NA	> 6.3 (45)	> 7.8 (52)
Distractibility	35	97	2	92	< 4.7 (52)	NA	> 7.1 (47)	NA
Go-NoGo	35	97	0	97	< 3.6 (45)	NA	> 7.0 (47)	NA
Flexibility^d	33	92	0	92		NA	> 8.4 (60)	NA
Vigilance	22	61	0	61	< 7.5 (50)	< 5.4 (36)	> 7.13 (47)	> 8.1 (54)
Visual Scanning	20	56	1	53	< 7.5 (50)	< 5.4 (36)	NA	NA
Sustained Attention	8	22	0	22	< 8.2 (55)	< 7.1 (47)	NA	NA
Divided Attention	5	14	0	14	< 8.2 (55)	< 7.1 (47)	> 8.4 (60)	NA

^aAbbreviations: FXS, Fragile X syndrome; IQ, intelligence quotient; KiTAP, Test of Attentional Performance for Children; MA, mental age; NA, not applicable
^bOut of 36 participants.
^cIQs are also given for reference but as the subjects vary in age, these are less refective of the ability level required to do the task than the MA.
^dThe mental age at which some subjects fail could not be derived for flexibility as IQ measures were not available for the three subjects who failed; however, subjects with MA of 3.6, 4.7 and 5.4 years were successful in completing this task both times.

ISSN: 1866-1955