The ‘Language learning gains among users of English Liulishuo’ study conducted by CRELLA, a leading research centre in the areas of language proficiency and language assessment, and the British Council shows that after an average of 36.88 hours study with English Liulishuo, 72% of participants improved their test scores.

The study investigated improvements in English language ability among 746 users of English Liulishuo app, taking courses at three levels over a period of approximately two months. To evaluate the influences of an AI teacher on English proficiency accurately and efficiently, Aptis test, a global English assessment tool developed by the British Council, was employed in the study.

Around 40% of participants progressed at least to the next higher level of the Common European Framework of Reference for Languages (CEFR), guideline used to describe achievements of learners of foreign languages across Europe.

Users who used English Liulishuo demonstrated more than 10 times higher language learning rates than those adopting other study approaches in addition to using English Liulishuo (0.324 versus 0.03).  Users usually made the greatest improvements in their reading and speaking skills.

Prof. Tony Green, Director for Language Testing Research, Test Development and Assessment Training at the University of Bedfordshire, said: "Mobile technology has the potential to transform language learning, really opening up opportunities for people who don’t have access to language classes.

"Of course, it is important to understand how effective apps can really be in heaping learners to improve their skills so we are delighted to have been given this opportunity to team up with the British Council to research the effectiveness of English Liulishuo.”

Hui Lin, Co-Founder and Chief Scientist of LAIX Inc, said: "It is definitely a fabulous experience to work with CRELLA. It is exciting to know that our product, English Liulishuo App, has been shown to be very effective for English learning in the study conducted by a leading research centre in the areas of language proficiency assessment.

"We believe our innovative approach has fundamentally transformed English learning, as our proprietary AI teacher utilizes cutting-edge adaptive learning technologies, well-established education pedagogies and the mobile internet, enabling us to provide a truly personalized, accessible and effective learning experience to our learners.”