. Author manuscript; available in PMC: 2016 Dec 1.

Published in final edited form as: Psychol Assess. 2016 Mar 7;28(12):1709–1715. doi: 10.1037/pas0000302

Table 2.

Mean Comparisons and Effect Sizes of Three WAIS Subtests by Age Group

	WAIS-III-M		WAIS-III-S		WAIS-III-US		t^M-US	d^M-US	t^S-US	d^S-US	t^M-S	d^M-S

Age	N	M(SD)	N	M (SD)	N	M (SD)
Digit Span
16–17	99	15.00 (4.00)	-	-	200	17.50 (4.25)	−4.88^*	−0.61	-	-	-	-
18–19	110	14.50 (3.50)	-	-	200	17.50 (4.25)	−6.08^*	−0.72	-	-	-	-
20–24	95	14.50 (3.75)	-	-	200	17.50 (4.50)	−5.63^*	−0.70	-	-	-	-
25–29	97	14.50 (3.50)	-	-	200	17.50 (4.50)	−5.77^*	−0.72	-	-	-	-
30–34	96	13.50 (3.75)	-	-	200	17.00 (4.25)	−6.88^*	−0.86	-	-	-	-
35–44	97	13.00 (3.50)	-	-	200	17.00 (4.25)	−8.57^*	−1.06	-	-	-	-
45–54	94	13.00 (3.50)	-	-	200	17.00 (4.25)	−7.99^*	−1.00	-	-	-	-
55–64	98	12.50 (4.00)	-	-	200	16.00 (4.50)	−6.54^*	−0.81	-	-	-	-
65–69	77	13.00 (3.50)	-	-	200	16.00 (4.25)	−5.51^*	−0.74	-	-	-	-
70+	107	10.50 (4.25)	-	-	650	14.63 (3.75)	−10.34^*	−1.24	-	-	-	-
Digit Span^†
16–19	209	14.75 (3.75)	163	16.00 (4.00)	400	17.50 (4.25)	-	-	−3.86^*	−0.36	−3.10	−0.32
20–24	95	14.50 (3.75)	153	16.00 (4.25)	200	17.50 (4.25)	-	-	−3.18^*	−0.34	−2.82	−0.38
25–34	193	14.00 (3.63)	272	16.00 (4.25)	400	17.25 (4.38)	-	-	−3.68^*	−0.29	−5.30^*	−0.50
35–54	191	13.00 (3.50)	408	14.00 (4.00)	400	17.00 (4.25)	-	-	−8.51^*	−0.60	−2.96	−0.27
55–69	175	12.75 (3.75)	237	11.00 (3.50)	400	16.00 (4.38)	-	-	−14.98^*	−1.23	4.87^*	0.49
70+	107	10.50 (4.25)	136	9.00 (3.50)	800	14.63 (3.75)	-	-	−16.83^*	−1.56	−3.02	−0.39
Digit Symbol
16–17	99	65.00 (16.00)	-	-	200	77.00 (15.75)	−6.17^*	−0.76	-	-	-	-
18–19	110	69.00 (15.00)	-	-	200	81.00 (16.00)	−6.46^*	−0.77	-	-	-	-
20–24	95	61.50 (23.00)	-	-	200	80.00 (16.25)	−7.95^*	−0.99	-	-	-	-
25–29	97	63.50 (18.00)	-	-	200	78.00 (15.50)	−7.16^*	−0.89	-	-	-	-
30–34	96	62.50 (18.50)	-	-	200	77.00 (16.00)	−6.91^*	−0.86	-	-	-	-
35–44	97	54.00 (19.50)	-	-	200	75.00 (16.50)	−9.68^*	−1.20	-	-	-	-
45–54	94	47.50 (18.00)	-	-	200	70.00 (15.25)	−11.12^*	−1.40	-	-	-	-
55–64	98	44.00 (22.00)	-	-	200	61.00 (15.00)	−7.83^*	−0.97	-	-	-	-
65–69	77	42.50 (24.00)	-	-	200	54.00 (15.00)	−4.78^*	−0.64	-	-	-	-
70+	107	65.00 (16.00)	-	-	200	43.75 (14.63)	13.79^*	1.66	-	-	-	-
Digit Symbol^†
16–19	209	67.00 (15.50)	163	77.00 (16.50)	400	79.00 (15.88)	-	-	−1.34	−0.13	−6.00^*	−0.63
20–24	95	61.50 (23.00)	153	77.50 (15.00)	200	80.00 (16.25)	-	-	−1.48	−0.16	−6.63^*	−0.87
25–34	193	63.00 (18.25)	272	76.00 (16.75)	400	77.50 (15.75)	-	-	−1.18	−0.09	−7.94^*	−0.75
35–54	191	50.75 (18.75)	408	65.00 (23.00)	400	72.50 (15.88)	-	-	−5.49^*	−0.39	−7.48^*	−0.66
55–69	175	43.25 (23.00)	237	39.50 (21.50)	400	57.50 (15.00)	-	-	−12.40^*	−1.02	1.70	0.17
70+	107	65.00 (16.00)	136	20.00 (14.00)	800	43.75 (14.63)	-	-	−17.35^*	−1.61	23.35^*	3.03
Block Design
16–17	99	36.50 (10.75)	-	-	200	41.50 (13.50)	−3.21	−0.40	-	-	-	-
18–19	110	37.50 (11.25)	-	-	200	41.50 (13.50)	−2.64	−0.31	-	-	-	-
20–24	95	38.50 (12.50)	-	-	200	41.50 (13.50)	−1.83	−0.23	-	-	-	-
25–29	97	40.00 (10.75)	-	-	200	41.50 (13.50)	−0.10	−0.12	-	-	-	-
30–34	96	35.50 (12.75)	-	-	200	41.00 (13.50)	−3.38^*	−0.42	-	-	-	-
35–44	97	29.50 (14.00)	-	-	200	40.50 (13.00)	−6.67^*	−0.83	-	-	-	-
45–54	94	30.50 (12.25)	-	-	200	36.50 (12.00)	−3.97^*	−0.50	-	-	-	-
55–64	98	29.00 (11.00)	-	-	200	33.50 (12.00)	−3.12	−0.39	-	-	-	-
65–69	77	25.50 (11.00)	-	-	200	29.50 (11.75)	−2.58	−0.35	-	-	-	-
70+	107	36.50 (10.75)	-	-	200	26.00 (8.75)	11.11^*	1.34	-	-	-	-
Block Design^†
16–19	209	37.00 (11.00)	163	46.50 (11.00)	400	41.50 (13.50)	-	-	4.19^*	0.39	−8.26^*	−0.87
20–24	95	38.50 (12.50)	153	46.50 (11.00)	200	41.50 (13.50)	-	-	3.73^*	0.40	−5.28^*	−0.69
25–34	193	37.75 (11.75)	272	45.50 (11.25)	400	41.25 (13.38)	-	-	4.31^*	0.34	−7.19^*	−0.68
35–54	191	30.00 (13.13)	408	37.00 (12.75)	400	38.50 (12.50)	-	-	−3.16^*	−0.22	−13.73^*	−1.21
55–69	175	27.25 (11.00)	237	25.50 (13.50)	400	31.50 (11.88)	-	-	−5.85^*	−0.48	1.40	0.14
70+	107	36.50 (10.75)	136	15.00 (18.75)	800	26.00 (8.75)	-	-	−13.33^*	−1.24	17.19^*	2.23

Note. For comparisons with the US, the negative values of the t and d indicate that the Mexican or Spanish mean is lower than the US test norm. For comparisons between Spain and Mexico, the negative values refer to the Mexican sample doing worse than the Spanish sample.

^†

Mean comparisons with the WAIS-III-S have a small age range and require a separate listing.

^M-USWAIS-III-S and WAIS-III-US mean comparisons.

^S-USWAIS-III-M and WAIS-III-US mean comparisons.

^M-SWAIS-III-M and WAIS-III-S mean comparisons.

= p < .001.