Standardization and cross-cultural comparisons of the Swedish Conners 3^® rating scales

Figures & data

Table 1. Number of Conners ratings by rater, age and gender for the Swedish standardization.

		Parent reports		Teacher reports		Self-reports
Age	Total	Girls	Boys	Girls	Boys	Girls	Boys
6	167	44	42	40	41	–	–
7	173	43	50	40	40	–	–
8	170	45	43	41	41	–	–
9	331	65	56	41	46	65	58
10	360	76	82	40	52	58	52
11	363	89	64	49	55	55	51
12	337	68	65	43	51	57	53
13	275	58	61	41	40	37	38
14	296	57	62	40	47	41	49
15	302	67	51	50	46	52	36
16	278	64	50	43	45	39	37
17/18	444	86	83	85	89	57	44
Total	3496	762	709	553	593	461	418

Table 2. Internal consistency and test-retest reliability.

	Internal consistency			Test–retest reliability
	Parent report (n = 1471)	Teacher report (n = 1146)	Self-report (n = 879)	Teacher report (n = 22)
	α	α	α	r
Content scales
Inattention	.90	.95	.91	.98
Hyperactivity/impulsivity	.91	.97	.85	.99
Learning problems	.85	.91	.82	.98
Executive functions	.88	.91	.72	.96
Aggression	.81	.95	.81	.99
Peer relations	.82	.90	n.a.	.98
DSM-oriented symptom scales
ADHD inattentive	.89	.95	.86	.96
ADHD hyperactive-impulsive	.88	.94	.82	.99
Conduct disorder	.66	.82	.62	.99
Oppositional defiant disorder	.85	.94	.73	.99

n.a.: not available.

Table 3. Across-informant correlations.

Scale	Mothers to fathers (n = 26)	Parents to teachers (n = 140)	Parents to youths (n = 139)	Teachers to youths (n = 85)
Inattention	.81***	.51***	.56***	.42***
Hyperactivity/impulsivity	.58***	.43***	.59***	.48***
Learning problems	.91***	.48***	.65***	.54***
Executive functions	.70***	.47***	–	–
Aggression	.44***	.15	.38***	.15
Peer relations	.45***	.39***	–	–
ADHD Inattentive	.76***	.47***	.59***	.50***
ADHD Hyperactive-Impulsive	.58***	.43***	.60***	.40***
Conduct disorder	.71***	.16	.34***	.08
Oppositional defiant disorder	.50***	.28***	.49***	.23*

*** p < .001;

* p < .05.

Table 4. Means (M) and standard deviations (SD) for parent and teacher ratings for all content scales divided by age and gender.

		Inattention				Hyperactivity/impulsivity				Learning problems				Executive functions				Aggression				Peer problems
		Parents		Teachers		Parents		Teachers		Parents		Teachers		Parents		Teachers		Parents		Teachers		Parents		Teachers
Age		M	F	M	F	M	F	M	F	M	F	M	F	M	F	M	F	M	F	M	F	M	F	M	F
6	M	6.05	4.59	5.83	2.78	7.5	6.18	9.80	4.53	5.24	3.98	2.93	1.73	5.38	3.91	4.29	2.98	2.36	1.34	5.46	1.23	1.14	0.82	3.10	1.00
	SD	4.55	2.99	5.44	3.86	5.3	5.78	10.57	5.61	4.45	3.17	3.38	2.53	3.92	2.18	2.81	2.13	2.23	1.49	7.78	2.30	1.78	1.40	3.71	1.67
7	M	4.68	4.59	7.98	3.26	6.2	5.90	14.85	6.28	3.64	3.10	3.35	1.82	4.20	4.17	5.65	3.54	2.54	2.12	5.28	2.26	1.80	1.37	3.93	2.67
	SD	3.58	3.48	7.25	4.50	5.6	5.28	14.81	9.10	4.37	2.70	4.33	2.47	3.37	2.76	4.51	2.36	3.68	2.85	6.88	4.12	2.81	1.86	4.46	3.28
8	M	7.21	4.59	7.93	4.20	5.9	5.25	16.61	4.90	3.69	3.39	2.54	3.02	6.31	4.86	6.85	3.32	2.88	1.73	6.98	1.00	2.19	1.16	3.63	1.76
	SD	5.98	3.18	7.00	5.97	6.8	4.98	14.89	7.98	3.75	3.08	2.83	4.08	5.01	3.53	4.44	3.38	3.25	2.37	8.05	2.06	2.84	1.83	4.25	2.62
9	M	5.60	5.35	8.15	3.24	6.0	4.44	14.20	5.83	3.33	2.97	3.00	1.39	5.71	5.06	7.22	3.51	2.51	1.56	6.78	2.98	1.11	1.24	4.09	3.07
	SD	4.10	4.61	7.87	4.03	4.78	5.30	14.07	8.89	3.61	3.50	3.78	1.99	3.70	4.16	5.37	3.30	2.65	1.99	9.03	5.39	1.37	1.69	4.19	3.80
10	M	6.24	4.53	9.40	3.78	6.06	4.48	12.23	5.35	4.06	3.03	3.79	2.65	6.41	4.78	7.38	3.98	1.89	1.53	6.04	2.40	1.32	1.10	4.06	3.35
	SD	4.77	3.72	7.90	4.67	5.76	4.96	12.63	7.75	4.48	3.66	4.36	3.70	4.23	3.50	5.35	3.82	2.56	2.09	8.15	4.00	1.89	2.10	4.49	4.55
11	M	5.65	4.97	8.56	4.92	5.44	4.85	12.67	6.39	2.37	2.91	3.00	2.69	5.46	4.86	7.02	5.01	2.17	2.31	5.71	3.16	1.46	1.40	4.25	2.78
	SD	4.01	5.21	7.44	6.30	5.86	6.70	11.83	9.84	3.04	3.84	3.86	3.73	4.55	5.05	5.06	4.54	2.43	3.25	8.16	5.36	1.83	2.45	4.71	3.87
12	M	6.40	4.02	8.36	3.30	5.00	3.29	13.20	5.60	3.42	2.52	3.63	1.72	6.26	4.10	7.22	3.77	2.79	1.65	4.90	2.58	2.19	1.63	2.98	2.37
	SD	4.70	4.07	7.03	3.92	4.89	3.96	13.23	7.94	4.38	3.78	4.10	2.40	4.08	3.88	5.01	3.50	3.04	2.20	6.24	5.34	3.29	2.44	3.10	3.72
13	M	5.95	4.93	7.93	3.44	4.64	3.74	15.10	4.05	4.24	3.29	3.05	2.10	6.61	4.84	6.30	4.02	2.37	2.27	6.40	1.80	2.31	1.80	3.73	2.37
	SD	4.70	3.83	7.98	4.89	5.23	4.15	14.02	5.56	4.72	3.94	4.18	3.01	4.70	3.84	5.40	3.73	2.71	3.01	8.97	3.81	2.15	2.65	4.03	3.21
14	M	6.08	4.76	6.68	4.05	3.47	3.24	8.89	3.40	3.53	3.91	3.40	2.85	6.49	5.35	6.81	4.08	2.47	2.41	4.57	1.48	2.73	1.72	3.70	1.80
	SD	4.73	4.57	5.98	6.14	4.19	3.81	11.88	5.34	3.64	4.69	4.34	3.22	5.06	4.98	4.34	4.14	2.81	2.83	7.80	3.57	3.48	2.34	3.97	3.03
15	M	5.33	4.10	6.52	4.68	2.84	3.13	7.96	5.44	3.51	2.92	2.57	2.82	6.20	4.95	6.46	4.54	1.96	1.98	3.83	3.18	3.00	1.80	3.24	3.26
	SD	4.14	3.82	6.78	5.67	2.96	4.23	10.66	7.63	4.48	4.18	3.65	3.28	4.80	4.41	4.93	3.64	2.62	3.28	6.87	5.88	3.48	2.81	3.27	3.80
16	M	4.60	4.03	7.00	6.23	2.81	3.85	7.80	7.49	3.27	3.90	2.58	3.05	5.90	4.59	6.76	5.02	1.56	1.97	4.00	2.56	2.00	2.21	3.00	2.33
	SD	5.21	3.77	6.98	7.32	5.90	4.62	10.85	9.84	4.35	4.04	3.19	4.70	4.27	4.05	5.59	4.31	2.24	2.13	5.37	4.60	2.92	2.88	3.72	3.33
17/18	M	5.52	4.30	8.99	4.74	3.38	2.84	10.16	6.06	4.11	2.73	4.12	2.53	6.77	4.84	7.97	5.21	1.73	1.53	3.97	2.64	2.04	1.64	3.06	2.64
	SD	4.60	4.13	7.70	5.23	4.48	3.95	11.34	6.76	4.98	3.46	4.46	3.25	4.84	4.83	5.62	4.55	2.62	2.40	6.68	5.34	2.26	2.44	3.60	3.40

Table 5. Overview of the effects of age and gender.

	Effects of gender			Effects of age
Scale	Parent ratings	Teacher ratings	Self-reports	Parent ratings	Teacher ratings	Self-reports
Content scales
Inattention	boys > girls	boys > girls	NS	NS	NS	3 > 2 > 1
Hyperactivity/impulsivity	boys > girls	boys > girls	boys > girls	1 > 2 > 3	1, 2 > 3	NS
Learning problems	boys > girls	boys > girls	NS	NS	NS	3 > 1, 2
Executive functions	boys > girls	boys > girls	—	NS	1 < 2, 3	NS
Aggression	boys > girls	boys > girls	boys > girls	NS	NS	NS
Peer relations	boys > girls	boys > girls	—	1, 2 < 3	NS	NS
Family relations	—	—	boys > girls	—	—	NS
DSM-oriented symptom scales
ADHD Inattentive	boys > girls	boys > girls	NS	NS	NS	NS
ADHD Hyperactive-Impulsive	boys > girls	boys > girls	boys > girls	1 > 2 > 3	1, 2 > 3	NS
Conduct disorder	NS	boys > girls	boys > girls	NS	NS	3 > 1, 2
Oppositional defiant disorder	NS	boys > girls	NS	NS	NS	NS

NS = Non significant.