The document discusses a correlational study that examined the relationship between students' intensity of using English dictionaries and their vocabulary mastery. It found a very strong positive correlation between the two variables. Specifically:
- Students reported often using dictionaries in their studies, which was found to increase their vocabulary knowledge over time.
- Testing revealed students had a high level of vocabulary mastery based on their ability to correctly answer vocabulary questions.
- Statistical analysis determined a very strong relationship between more intensive dictionary use and greater vocabulary mastery, with dictionary use accounting for over 92% of improvements in students' vocabularies.