Home-based cognitive training in pediatric patients with acquired brain injury: preliminary results on efficacy of a randomized clinical trial.

Duncan post-hoc analyses on visual-spatial working memory revealed that, in the Training-first Group (G1), delta 1 (M = 0.85, sem = 0.26) was significantly larger than delta 2 (M = −0.35, sem = 0.22; P < 0.01), with a very large effect (Cohen’s d = 1.21); in contrast, in the Waiting-first Group (G2), the difference between delta 1 (M = −0.19, sem = 0.30) and delta 2 (M = 0.34, sem = 0.25) was marginally significant (P = 0.05) and in the expected direction of a medium-sized improvement after training (Cohen’s d = 0.53).

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Indeed, the medium-sized difference between the delta 2 values of the two groups showed a trend towards statistical significance (P = 0.08; Cohen’s d = 0.72), being larger in the Waiting-first group than in the Training-first Group, as expected.

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