Table 2.

Summary of the DES scores: CON group and EXP group.

	∑DES base	∑DES follow-up	Δ in ∑DES
CON respondents
1	57	61	−4
2	49	50	−1
3	71	65	6
4	46	41	5
5	32	34	−2
6	41	41	0
7	57	52	5
8	43	46	−3
9	63	61	2
10	44	49	−5
11	47	59	−12
12	54	64	−10
13	63	61	2
14	48	50	−2
15	71	64	7
16	65	63	2
17	31	38	−7
18	61	63	−2
Average score	52.39	53.44	−1.06
EXP respondents
1	70	50	20
2	57	65	−8
3	56	39	17
4	54	53	1
5	68	55	13
6	59	63	−4
7	58	47	11
8	52	50	2
9	52	42	10
10	64	71	−7
11	64	58	6
12	67	59	8
13	51	52	−1
14	65	63	2
15	58	65	−7
16	50	50	0
17	58	61	−3
18	61	62	−1
19	67	67	0
Average score	59.53	56.42	3.11
SD	9.88	9.47	—
Difference in average change score			4.16
T test (P value)			0.076
Difference in average change scores			4.16
Standard deviation base			9.88
Standardised effect size = change in average / base·SD			0.42