See summary of the study here.
Significant points:
• “For both literal and inferential comprehension, the advantages from reading on paper were found to be significant.”
• “Benefits from reading on paper were limited to expository texts. For narrative texts, generally regarded as easier to read and requiring less background knowledge to understand, no significant difference between paper and screens were found.”
• “‘Calibration accuracy,’ or being able to predict how well you understand what you just read, is better when reading text from paper compared to screens, according to the study.”
Ms. Crandell 