On the SAT, vocabulary isn't tested in isolation but rather in the context of sentence completions and reading passages. How does the SAT/Digital SAT test vocabulary? As you encounter complex texts and nuanced questions, a solid understanding of vocabulary can clarify meaning, enhance comprehension, and ultimately, increase your confidence during the test. The SAT is designed to measure your knowledge and skills in reading, writing, and mathematics, and understanding vocabulary in context significantly contributes to your performance in the reading and writing sections.