Table 3.

Overall ANOVA models and R² for each scale of psychopathology for Williams syndrome, Fragile X syndrome and Prader–Willi syndrome

	Total score	Depressed mood	Generalised anxiety	Manic hyperactivity	Obsessive compulsive	Social avoidance	DBC mean item score	DBC intensity
Williams syndrome
Step 1
F statistic	1.30	1.14	.91	1.63	.73	1.29	2.91	2.50
df	(2,32)	(2,31)	(2,32)	(2,32)	(2,32)	(2,31)	(2,31)	(2,31)
R2	.08	.07	.05	.09	.04	.08	.16	.14
Step 2
F statistic	6.25***	5.67*	4.77*	3.92*	2.20	7.12***	8.16***	5.92*
df	(5,29)	(5,28)	(5,29)	(5,29)	(5,29)	(5,28)	(5,28)	(5,28)
R2	.52	.50	.45	.40	.28	.56	.59	.51
Fragile X syndrome
Step 1
F statistic	.35	.14	.07	1.80	1.26	1.28	4.86	2.38
df	(2,45)	(2,43)	(2,45)	(2,45)	(2,45)	(2,45)	(2,44)	(2,43)
R2	.02	.01	.00	.07	.05	.05	.18	.10
Step 2
F statistic	1.35	1.43	1.34	1.45	2.29	.74	5.01*	2.49
df	(5,42)	(5,40)	(5,42)	(5,42)	(5,42)	(5,42)	(5,41)	(5,40)
R2	.14	.15	.14	.15	.21	.08	.38	.24
Prader–Willi syndrome
Step 1
F statistic	3.97	4.00	3.37	5.31	1.41	2.08	2.70	2.19
df	(2,23)	(2,22)	(2,23)	(2,23)	(2,23)	(2,23)	(2,23)	(2,23)
R2	.26	.27	.19	.32	.11	.15	.19	.09
Step 2
F statistic	2.71	3.53	2.51	3.62	1.49	1.40	3.49	2.33
df	(5,20)	(5,19)	(5,20)	(5,20)	(5,20)	(5,20)	(5,20)	(5,20)
R2	.40	.48	.35	.48	.27	.26	.47	.37

*p < .01; **p < .001; ***p < .0001