Hypothesis
Action video-game training remedies reading difficulty in children with dyslexia, as studies in Italian and English-speaking children reported.
What failed
Fifty-four Polish children with dyslexia trained on action or phonological non-action games gained in reading speed and accuracy, phonological awareness, selective attention and rapid naming, but by no more than an untrained dyslexic control group.
Broken assumption
Improvement observed during game training is caused by the training.
Why
The authors attribute the gains to ordinary schooling-related reading development or test practice, and note that the earlier supportive studies had small samples and no untreated control group.
From the published paper: Łuniewska et al. Scientific Reports, 2018. ↗CC BY