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WISC-IV[1] Subtest Combinations with Appropriate Tellegen and Briggs Formula[2]

	r		Multiplier		Sum of Scaled Scores		Additive
Verbal Comprehension
I + V + C	.93	SS=	1.88	X	∑ I + V + C	+	43.7
S + I + C	.93	SS=	1.91	X	∑ S + I + C	+	42.8
S + V + I	.95	SS=	1.84	X	∑ S + V + I	+	44.8
WR + V + C	.93	SS=	1.91	X	∑ WR + V + C	+	42.6
S + WR + C	.92	SS=	1.94	X	∑ S + WR + C	+	41.8
S + V + WR	.94	SS=	1.88	X	∑ S + V + WR	+	43.5

Perceptual Reasoning
pcm + pcn + mr	.93	SS=	2.11	X	∑ pcm + pcn + mr	+	36.8
bd + pcm + mr	.93	SS=	2.02	X	∑ bd + pcm + mr	+	39.4
bd + pcn + pcm	.92	SS=	2.10	X	∑ bd + pcn + pcm	+	37.1

Working Memory
A + LNS	.93	SS=	2.88	X	∑ A + LNS	+	42.5
DSp + A	.91	SS=	2.92	X	∑ DSp + A	+	41.7

Processing Speed
CA + SS	.84	SS=	3.08	X	∑ CA + SS	+	38.5
Cd + CA	.87	SS=	2.99	X	∑ Cd + CA	+	40.2

To use this table, first calculate the Sum of Scaled Scores for the appropriate subtest combinations by adding the scaled scores for those subtests. Multiply this sum by the number in the corresponding “Multiplier” column, and then add the number in the “Additive” column to this result. The result is a Standard Score obtained from the subtest substitution combination.

[1] Wechsler, D. (2003). Wechsler Intelligence Scale for Children (4^th ed.) (WISC-IV). San Antonio, TX: The Psychological Corporation.
[2] Tellegen, A., & Briggs, P. (1967). Old wine in new skins: Grouping Wechsler subtests into new scales. Journal of Consulting Psychology, 31, 499-506.