A Study of Extensive Reading With Remedial Students.
This paper reports a study that used a pre-test, post-test control group design to measure the effectiveness of extensive reading with remedial reading students in a Philippines secondary school. Results suggest that extensive reading led to greater gains that traditional reading instruction.

Extensive reading with adult learners.
This article reports a study that looked at the effect of reading habits on the second language learning of government officials from Vietnam learning English in Singapore. Results suggest that extensive reading is a significant predictor of second language proficiency.