The effectiveness of an individualised and adaptive game-based rehabilitation, iVision, on visual perception in cerebral visual impairment: A triple-blind randomised controlled trial.
Adaptive algorithms in vision games give no extra payoff over static games for kids with cerebral visual impairment.
01Research in Context
What this study did
Researchers built a game called iVision for kids with cerebral visual impairment. The game changes difficulty on its own for half the kids. The other half played the same game without the auto-adjust.
No one knew who got which version — kids, parents, or testers. After weeks of play, the team checked if the smart game improved vision scores more than the plain one.
What they found
Both groups improved the same amount on visual-perception tests. The fancy adaptive engine added zero extra benefit.
Kids liked the game, but the algorithm did not speed up or deepen their gains.
How this fits with other research
Kanter et al. (2010) also ran a triple-blind RCT with a computer vision game. They saw small gains in perception but no jump in visual-motor skill, matching the flat adaptive effect here.
Fernández-Andrés et al. (2015) compared game versus non-game prism training and found equal after-effects, echoing iVision’s null result: game features alone don’t beat simpler tasks.
EbrahimiSani et al. (2020) looks like a contradiction — their Kinect game beat a wait-list. But they had no active control, so the boost may come from extra practice, not the game itself.
Why it matters
You can skip pricey adaptive licenses. Pick any engaging visual activity — flashcards, tablet games, or crafts — and give lots of trials. Track progress with the CVI-adapted GMFM-88 shown by Laposa et al. (2017) if motor goals are also on the plan. Save budget for reinforcers and staff time instead of smart software that does not add value.
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02At a glance
03Original abstract
BACKGROUND: Cerebral visual impairment (CVI) can negatively affect a child's functioning, emphasising the need for interventions to improve visual perception (VP), potentially translating into improved health-related quality of life (HRQOL). AIMS: Assessing the effectiveness of an adaptive individualised game-based rehabilitation, iVision, on VP, visual function, functional vision, and HRQOL. METHODS AND PROCEDURES: Seventy-three children with CVI (3-12 performance age) were randomised into the adaptive individualised or the non-adaptive non-individualised group (3 sessions/week; 12 weeks). Primary outcome was change score (post-intervention - pre-intervention) of the lowest VP dimension. Key secondary outcomes included change score (post-intervention - pre-intervention) of visual function (reaction time to fixation in a preferential looking eye-tracking paradigm), functional vision (success rate in the adapted virtual toy box paradigm; total Flemish CVI questionnaire score), HRQOL (total scale score of the paediatric quality of life inventory 4.0 child self-report), and the lowest VP dimension change score (short-term follow-up - pre-intervention). OUTCOMES AND RESULTS: Both groups significantly improved on the primary outcome, maintaining at short-term. Between-group differences were not significant. No significant effect was found for other key secondary outcomes. Exploratory analyses revealed VP dimension improvements and clinically meaningful HRQOL improvements. CONCLUSIONS AND IMPLICATIONS: Although children with CVI improved their VP and to some extent HRQOL, no differences were found between the groups.
Research in developmental disabilities, 2025 · doi:10.1016/j.ridd.2024.104899