Table 1.

Nomothetic comparisons of Wechsler Intelligence Scale for Children and Adolescent–Fifth Edition Scores for 225 children in a clinical sample twice tested across, on average, a 2.6 year interval.

	Test		Retest		Retest-test difference
Score	Mean	SD	Mean	SD	Mean*	|d|	r a
Subtest
BD	8.81	3.09	8.60	3.33	−0.22	0.07	0.68 [0.60, 0.75]
SI	8.81	3.29	9.04	2.80	0.24	0.07	0.68 [0.61, 0.75]
MR	8.77	3.26	9.04	3.05	0.27	0.09	0.59 [0.49, 0.67]
DS	7.62	3.05	7.90	3.08	0.28	0.09	0.76 [0.70, 0.81]
CD	7.49	3.35	7.31	3.22	−0.18	0.05	0.66 [0.58, 0.73]
VO	8.76	3.58	8.83	3.50	0.07	0.02	0.79 [0.74, 0.84]
FW	9.54	2.89	9.20	3.15	−0.34	0.11	0.53 [0.43, 0.62]
VP	9.59	3.26	9.60	3.15	0.01	0.00	0.75 [0.69, 0.80]
PS	8.52	3.09	8.45	3.13	−0.07	0.02	0.50 [0.40, 0.60]
SS	7.68	3.44	7.80	3.17	0.12	0.04	0.62 [0.54, 0.70]
Composite
VCI	93.32	17.46	94.00	16.38	0.68	0.04	0.84 [0.79, 0.87]
VSI	95.68	15.96	95.26	16.92	−0.42	0.04	0.82 [0.77, 0.86]
FRI	95.39	15.38	94.84	16.39	−0.55	0.02	0.69 [0.61, 0.75]
WMI	88.38	15.10	89.15	15.31	0.77	0.05	0.74 [0.67, 0.79]
PSI	86.47	17.52	86.19	17.02	−0.28	0.03	0.77 [0.71, 0.82]
FSIQ	89.97	16.03	89.98	16.42	0.01	0.00	0.86 [0.82, 0.89]

Note. BD: Block Design; SI: Similarities; MR: Matrix Reasoning; DS: Digit Span; CD: Coding; VO: Vocabulary; FW: Figure Weights; VP: Visual Puzzles; PS: Picture Span; SS: Symbol Search; VCI: Verbal Comprehension Index; VSI: Visual Spatial Index; FRI: Fluid Reasoning Index; WMI: Working Memory Index; PSI: Processing Speed Index; FSIQ: Full Scale IQ; SD: standard deviation; d: standardized mean difference; and r: test-retest correlation.

^ar and 95% confidence limits for total sample. Coefficients ≥0.80 in bold.

^*No mean WISC-V score differences were statistically significant with the experiment-wise error rate held at 0.05 (Holm, 1979).