In the master's thesis, we examined the potential effect of the specialy developed chair for children with ADHD. This differs from the common school chair in a foot swing, which allows the child to move his legs spontaneously, a characteristic of hyperactivity, which is the central symptom of ADHD. We were interested in whether the ability to move freely on the chair relieves cognitive control and promotes cognitive efficiency. We designed an experiment in which children with ADHD (N = 11) and healthy controls (N = 12), aged 8 to 11 years, sat on a common school chair, ADHD chair, and therapy ball, and solved working memory, inhibition, planning, reading and writing tasks. We assumed that children with ADHD would perform best on the ADHD chair. Descriptive statistics confirmed our expectations, however the effects did not reach statistical significance. Underutilization of the ADHD chair could be a reason. In the future studies it would be of key importance to increase the power of the study by increasing the number of participants.
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