All the test-takers will find this question the most profound of all: Should the entire passage be read first or should the questions be read first?
The answer depends on your ability and your current score (or your goal).
If your score is below 80, wouldn’t it be impossible to read through the passage in just about 5~6 minutes to get the gist (as well as examples and details to support the main ideas) and confidently move on to each question? My advice is to directly go on to Question 1. After you read the question and four answer choices, you read the corresponding part of the passage (which appears on the screen) specifically to search for the answer.
This strategy is effective because you can set your purpose of reading the passage before you start reading. Whatever activity you may get involved in (sales promotion, for example), you will have a better result if your goal is clearly set. If you think “the larger number you can sell, the better you feel.” You will not be able to put your desire into action, thus failing to “feel good.”
The same it true of the TOEFL reading. The reading passage is as wide and deep as the Pacific Ocean. It is hard to get the whole picture of the ocean by sailing without a purpose. If your goal is to see if there are dolphins in the five-mile radius of Oahu, an island of the State of Hawaii, your goal is more likely to be reached.
If you can read the entire passage in 5 minutes before moving on to the questions, however, you should. Having already understood the main ideas and details, you stand a better chance of getting the correct answers. But if it takes more than 10 minutes to read the passage, you should take the “Question prior to Passage” approach. The passage is not worth spending as much as 10 minutes without knowing what to answer. The ultimate goal is to get a higher score.
What if it takes 7 or 8 minutes? That’s when you take the topic into consideration. If the topic is familiar to you, you can make it to the end of the passage faster and better. If it is not familiar, the “Question prior to Passage” approach is in action.