Evidence-Based, Research Proven: Measuring Lexia’s Impact
For over 20 years, studies on Lexia products have been conducted and published by researchers around the world.
The use of Lexia solutions with study groups has proven to be significantly superior to those achieved by control groups receiving equal amounts of traditional instruction and practice.
Lexia now has 19 externally-reviewed research studies which are listed below.
Education Endowment Foundation Evaluation Report on Lexia Core5 Reading (updated December 2022)
Based on the strength of existing studies, Lexia’s large user base across England and a strong alignment to their guidance reports on improving literacy, the EEF identified Lexia as a promising program to investigate.
The EEF literacy report was published following a two-armed randomised control study which involved 697 pupils across 57 schools and focussed on pupils identified as struggling readers in Year 2.
The independent evaluation found that children offered Lexia made the equivalent of 1 additional months’ progress in reading, on average, compared to other children.
These results received a high security rating on the EEF padlock scale. In addition, the cost of delivery was reported as ‘very low’.
The EEF reported subgroup analysis findings on FSM status pupils who took part in the study.
This reported an effect of 2 months’ additional progress for struggling readers who also fell under the FSM category, which is greater than the effect shown in the primary analysis.
These results suggest that the Lexia program may be more effective in FSM pupils; however, the sample was limited and the study was not powered to detect an effect in any subgroup.
An alternative analysis shows a slightly higher impact of two months’ progress in reading for all pupils and three months’ progress in reading for FSM pupils (exploratory analysis). This analysis was communicated in the previous version of the evaluation report but has been superseded in the Dec 22 version by the analysis pre-specified before the analysis was conducted.
For the full updated report visit EEF