Ask Questions During "Read Alouds"

Researchers are moving away from listening to oral reading rather than engaging in the text through questioning.  Better literacy outcomes result.
Turn listening into active participation in the reading process.  Most good teachers, especially in the lower grades already do this.  It is effective also for older, more mature readers. 
What tips can you provide for other LEX teachers?  Lower grades?  Higher grades?

Asking questions while reading out loud improves literacy, new study reveals. Ryan Arciero. 6.2.12 Examiner
http://www.examiner.com/article/asking-questions-while-reading-out-loud-improves-literacy-new-study-reveals