Bionic Reading Fails to Boost Reading Speed
A new study with 90 adult readers finds that bolding certain letters in words changes eye movement but doesn't improve reading speed, despite its promise to facilitate comprehension
A recent eye-tracking experiment conducted by scientists from University College London has put the Bionic Reading method to the test. The method involves bolding certain letters in words to facilitate reading speed and comprehension. The study, which involved 90 skilled adult readers, found that bolding changed where readers looked, but didn't make them read faster.
The researchers tested selective bolding in the beginning versus the middle of both short and long words. They found that bolding the initial letters of longer words affected where the readers' eyes landed, but this did not translate to an increase in reading speed. This finding is significant, as the idea behind Bionic Reading is that guiding the eyes to focus on highlighted initial letters lets the brain complete the word more efficiently.
The study's participants, aged 18 to 40, read 90 sentences presented individually on a screen in the font Courier New. The sentences contained either no bolded letters, bolded letters at the beginning of target words, or bolded letters around the middle of target words. The researchers tracked the readers' eye movements to determine the effect of bolding on reading speed and comprehension.
Initial letters play a crucial role in recognizing words, so it was thought that making them stand out might help readers identify words more efficiently. However, an earlier eye-tracking study published in 2025 found that bolding word beginnings actually hindered rather than helped reading. The new study's findings support this earlier research, suggesting that Bionic Reading may not be as effective as claimed.
## Why it matters The study's findings have implications for the use of Bionic Reading in educational and reading materials. While the method may change where readers look, it does not appear to improve reading speed or comprehension. This raises questions about the effectiveness of Bionic Reading and whether it is worth implementing in reading materials. As the researchers report their findings in the journal Royal Society Open Science, it is clear that more research is needed to fully understand the effects of Bionic Reading on reading speed and comprehension.
The study's results are significant for anyone interested in improving reading speed and comprehension. With the rise of digital reading materials, it is essential to understand how different formatting methods, such as Bionic Reading, affect the reading experience. While Bionic Reading may not be the solution to faster reading, further research may uncover other methods that can improve reading speed and comprehension.
