A researcher claims that a new automated reading-coach program improves elementary students' reading fluency more than the same amount of time spent reading independently.
Which experimental finding, if true, would most strongly support the researcher's claim?
- A
Students use computers in classrooms for many subjects.
- B
Some reading programs have been studied for decades.
- C
Many schools have begun using digital reading programs.
- Dcheck_circle
Students randomly assigned to use the reading-coach program for 20 minutes a day improved their reading fluency over a semester significantly more than students assigned to spend 20 minutes a day reading independently.
Explanation
A controls time on task and directly compares the program to independent reading via random assignment. B, C, and D are tangential.