Table 6.

Correlations and explained variance (r²) of VIQ and PIQ in relation to the language variables

	Sentence comprehension (RDLS)	Word comprehension (SPIQ)	Word analogies (ITPA)	Grammar (PT)	Phonological speech production (PSPA)	Phonological processing (NWRT)
VIQ: correlation	0.626**	0.563**	0.811**	0.541***	−0.309***	0.302**
r2	0.392	0.317	0.658	0.293	0.095	0.091
n	82	82	65	80	80	77
PIQ: correlation	0.396**	0.312**	0.299**	0.294**	−0.194	0.274*
r2	0.157	0.097	0.089	0.086	0.038	0.075
n	82	82	65	80	80	77

Notes:

^*P<0.05 (Pearson, two-tailed);

^**P<0.01 (Pearson two-tailed);

^***P<0.01 (Spearman, two-tailed).

Abbreviations: ITPA, Illinois Test of Psycholinguistic Abilities; NWRT, nonword-repetition task; PT, Processability Test; PSPA, phonological speech-production assessment; RDLS, Reynell Developmental Language Scale; SPIQ, Snabbt Performancetest på Intelligence (IQ).