Table 2.

Cohen’s d effect sizes comparing the pre- to post-treatment mean change between groups on spoken discourse measures.

		Mean Change
Retell Condition	Measure	AAC n = 6	Usual Care n = 6	Effect Sizea
		M(SD)	M(SD)	Cohen’s d
	WAB-R AQb	3.20(5.75)	1.83(4.10)	0.27
	Spoken Discourse
Retell with the AAC device	%Counted Words	7.27(8.50)	1.58(4.58)	0.83
	%CIUsc	2.48(11.72)	−4.69(5.49)	0.78
	CIUS/Minute	−1.53(6.88)	0.00(10.62)	−0.17
	%Mazed Wordsd	−0.70(7.13)	1.09(4.04)	−0.31
	%Tunitse	11.13(8.49)	0.71(10.50)	1.09
	Expressive Modality Units
	%Spokene	−4.64(5.75)	2.24(10.9)	−0.79
	%Drawn	−3.67(0.92)	−0.21(0.46)	0.11
	% Gesture	−2.25(6.07)	−3.67(5.32)	−0.25
	%Written	−1.07(5.38)	0.24(1.04)	−0.34
	% Photograph	5.16(6.32)	−0.36(6.03)	0.89
	%Speak Button	0(0)	0(0)	NA
	%Text Box	2.87(9.27)	3.29(10.7)	0.04
Retell without the AAC device
	Spoken Discourse
	%Counted Words	−0.17(4.84)	−3.15(10.44)	0.37
	%CIUsc	−1.44(8.70)	−2.32(5.34)	0.12
	CIUS/Minute	0.92(2.91)	−2.92(6.40)	0.72
	%Mazed Wordsd	0.68(2.11)	2.19(6.77)	−0.30
	%Tunitse	8.18(7.97)	−0.03(12.92)	0.77
	Expressive Modality Units
	%Spokene	1.83(8.2)	−0.86(11.18)	0.20
	%Drawn	−1.00(2.94)	−0.69(1.68)	−0.13
	%Gesture	5.84(9.80)	−7.49(8.99)	1.48
	%Written	−5.48(5.81)	2.77(2.27)	−1.87
	% Photograph	NA	NA	NA
	%Speak Button	NA	NA	NA
	%Text Box	NA	NA	NA

Note.

^aEffect size: small effect = 0.2, medium effect = 0.5, large effect = 0.8..

^bWestern Aphasia Battery-Revised Aphasia Quotient

^ccorrect information unit

^dA decrease in % mazed words is a positive gain.

^eSpoken expressive modality units refers only to number of utterances spoken.