Table 6.

Percentages of youth in each of the three treatment groups for whom the intervention was evaluated as positive^A on the post-treatment SDQ and the follow-up interview

	Cogmed WMT (n = 28)	Stimulant medication (n = 30)	Combined treatment (n = 20)	χ2(2)
Post-treatment
SDQ P reduced ADHD symptoms	14.3a	50.0b	35.0ab	8.35*
SDQ T reduced ADHD symptoms	3.6a	66.7b	55.0b	26.00***
SDQ C reduced ADHD symptoms	21.4a	60.0b	60.0b	10.75**
SDQ P made problem more bearable	35.7a	80.0b	55.0ab	11.72**
SDQ T made problem more bearable	17.9a	60.0b	60.0b	12.89**
SDQ C made problem more bearable	57.1	76.7	65.0	2.52
One-year follow-up interview (P)
Improved ADHD symptoms/daily functioning	7.1a	53.3b	65.0b	20.07***
Helpfulness of intervention	10.7a	76.7b	90.0b	37.96***

Percentages not sharing similar superscripts differ at p < .05

WMT working memory training, SDQ Strengths and Difficulties Questionnaire, P parent, T teacher, C child

^AAll variables were dichotomized so that chi square tests could be conducted without violating the ‘frequencies should be greater than 5’ assumption