Table 3.

Attentional processing of speech and non speech stimuli.

Task	Type of measure	T1 mean (s.d.)	T2 mean (s.d.)	T3 mean (s.d.)	T4 mean (s.d.)	T1/T2		T2/T3			T3/T4
						T-test	P-value	Effect size	T-test	P-value	Effect size	T-test	P-value
Auditory attention	Correct resp. (A)	32.83 (19.30)	31.33 (5.15)	45.16 (6.71)	45.25 (2.85)	0.29	0.77		6.35	0.001***	2.31	0.04	0.96
	Correct resp. (B)	29.25 (12.31)	30.16 (6.64)	38.80 (8.58)	38.50 (8.63)	0.39	0.70		4.25	0.01**	1.12	0.14	0.89
	Total (s.d. from norm)	−1.0 (0.83)	−1.00 (0.31)	−0.36 (0.54)	−0.25 (0.62)	0.01	0.99		5.72	0.001***	3.09	1.48	0.17
Visuo-spatial attention	Correct resp. (A)	19.66 (1.15)	19.91 (0.28)	2.00 (0.00)	19.91 (0.28)	0.71	0.49		1.00	0.33		1.01	0.33
	Correct resp. (B)	14.00 (3.83)	16.90 (3.20)	17.00 (2.76)	16.60 (3.11)	−3.77	0.003**	0.82	0.16	0.87		0.84	0.42
	Total (s.d. from norm)	−0.86 (1.0)	−0.50 (0.77)	−0.69 (1.12)	−0.72 (1.03)	1.77	0.10		0.50	0.62		0.11	0.91
Working memory: Digit span (s.d. from norm)	Forward (s.d. from norm)	1.51 (1.10)	1.22 (1.05)	1.13 (0.98)	0.87 (1.36)	−1.08	0.30		0.44	0.67		0.68	0.51
	Backward (s.d. from norm)	−1.07 (0.52)	−0.99 (0.47)	−0.83 (0.63)	−0.59 (0.88)	0.40	0.68		0.75	0.47		1.04	0.32
Rhythm reproduction	Errors	1.16 (3.07)	9.58 (2.81)	8.25 (2.17)	9.33 (2.08)	0.61	0.55		1.34	0.21		−1.82	0.09

Children' levels of performance were measured four times (T1, 6 weeks before CMT started; T2, just before CMT; T3, just after CMT; T4, 6 weeks after CMT ended). Mean and standard deviation or s.d. from norms (when indicated) for each task are reported. Student T-tests and p-values were computed; significant improvements are in bold (

^***p < 0.001;

^**p < 0.01). Effect sizes are also reported when relevant (Cohen's d).