The purpose of this study was to examine the feasibility and efficacy of computerized cognitive exercises from Scientific Brain Training (SBT), compared to the computer game Tetris as an active placebo, in a pilot study of adolescents with Attention-deficit/hyperactivity disorder (ADHD).

Objective: To examine the feasibility and efficacy of computerized cognitive exercises from Scientific Brain Training (SBT), compared to the computer game Tetris as an active placebo, in a pilot study of adolescents with Attention-deficit/hyperactivity disorder (ADHD).

Method: Eighteen adolescents with ADHD were randomized to treatment or control intervention for seven weeks. Outcome measures were cognitive test, symptom and motivation questionnaires.

Inclusion Criteria:

1. a clinical diagnosis of hyperkinetic disorder (F90.0, corresponding to ADHD combined type) (WHO, 1993);
2. age between 14-17 years;
3. IQ > 80.

Exclusion Criteria:

1. pharmacological treatment other than methylphenidate, dexamphetamine and/or atomoxetine;
2. comorbid conduct disorder, autism spectrum disorders or major depression;
3. history of head trauma or verified neurological disease;
4. motor or perceptual disabilities which prevented the use of a computer;
5. medical illness that required treatment;
6. no access to a computer and internet at home.