Our screener is highly accurate and has been tested on 850 children in 15 schools across the UK. Our results identified every non-dyslexic correctly and the vast majority of dyslexics. When combined with a "risk" score and background questions, it's extremely unlikely that a potential dyslexic would be missed. We also double-check all results with a human, which is why there is a 48-hour delay between completing the test and receiving the report. In due course a research report will be released, showcasing our results. For a preliminary update, you can email us at firstname.lastname@example.org.
It's worth noting that given government regulation, for the most accurate results and a formal diagnosis, we still recommend going to a reputable Educational Psychologist (EP) or assessor for a complete evaluation.