Table 4.

Pearson correlations between pragmatic skills (PS) and executive functions (EF) and between PS and intellectual quotient (IQ); and results of the test of differences between the correlation coefficients for the two relationships.

PS	EF					IQ		EFa	IQb	rPSxEF ≠ rPSxIQc
Scales variables	Self-control	Inhibition	WM	Flexibility	Planning	Vocabulary	VC			Z	(p)
Conver. complexity	−0.20	−0.09	0.03	0.20	−0.10	0.09	0.18	−0.12	0.18	2.10	0.04*
Turnabout	−0.12	−0.07	0.03	0.20	−0.10	0.05	0.16	−0.09	0.14	1.61	0.11
Organization of utterances	−0.18	−0.15	0.06	0.10	−0.05	0.17	0.20	−0.11	0.23t	2.38	0.02*
Number of new themes	−0.20	−0.07	0.01	0.16	−0.06	0.12	0.10	−0.11	0.14	1.75	0.08
Abstraction level of themes	−0.09	0.03	0.04	0.14	−0.11	−0.08	0.12	−0.04	0.03	0.63	0.53
Talkativeness	−0.19	−0.28*	−0.09	0.04	−0.15	−0.03	0.10	−0.24*	0.05	2.04	0.04*
Number of words	−0.24t	−0.18	−0.05	0.07	−0.15	0.05	0.03	−0.21	0.05	1.83	0.07
Number of utterances	−0.14	−0.09	−0.02	−0.04	−0.04	−0.17	0.02	−0.10	−0.09	0.07	0.94
Utterances per speaking turn	−0.10	−0.40**	−0.15	0.07	−0.18	0.05	0.18	−0.28*	0.15	3.02	0.002**
Assertiveness	−0.23t	−0.20	−0.17	0.14	−0.08	−0.01	0.02	−0.23t	0.01	1.69	0.09
Initiations	−0.19	−0.20	−0.12	0.16	−0.15	0.14	0.01	−0.22	0.09	2.17	0.03*
Requests	−0.12	−0.22	−0.25*	0.06	−0.04	−0.12	−0.02	−0.21	−0.09	0.85	0.39
Breakdown repairs	−0.24t	−0.05	−0.03	0.11	−0.01	−0.05	0.05	−0.11	−01	0.70	0.48
Communicative control	0.21	0.15	0.13	−0.01	0.26*	0.02	0.01	0.25*	0.02	1.63	0.10
Fluidity	0.30*	0.30*	0.25*	−0.06	0.31**	0.17	0.08	0.38**	0.15	1.69	0.09
Non-interruption	0.02	−0.07	−0.05	0.05	0.09	−0.14	−0.06	−0.01	0.13	0.98	0.33
Responsiveness	−0.04	0.00	0.29*	0.04	0.00	−0.06	0.09	0.08	0.02	0.42	0.67
Contingency	−0.06	0.03	0.25*	0.05	−0.04	−0.06	−0.01	0.07	−04	0.77	0.44
Utterance clarity	−0.02	−0.03	0.26*	0.01	0.03	−0.05	0.17	0.08	0.08	0	1.00

VC, visuoconstructive abilities; Conver. Complexity, conversational complexity.

^aFlexibility was not included in the EF composite score.

^bIQ was estimated using measures of receptive vocabulary and visuoconstructive abilities.

^cProbability that the correlation between EF and PS is significantly different (p < 0.05) from that between IQ and PS using the Meng et al. (1992) method.

^tMarginally significant at p < 0.06,

^*p < 0.05, and

^**p < 0.01.