The control group received instruction through traditional methods and techniques as
was planned beforehand. That is, the students in the control group were taught grammatical
structures of the target language
Effect of Task-based Writing Activities upon Reading Comprehension
The control group and the experimental group had to be at the same level of language
proficiency before the application of task-based writing activities to the experimental group in
order to reach reliable conclusions. Of course, this is not a must for pre-test / post-test control