The LSAT experimental section can be identified in many situations. Remember, the LSAT is administered in two “sittings.” Students take the first three sections with no break in between the sections, are given a short break, and then take the final two sections. The writing sample is the final section of the exam. The LSAT experimental section is always one of the first three sections of the exam. By the time you take your break, you will have already taken the experimental section.
If two (or more) of the first three sections are comprised of Logical Reasoning questions, then there is no way to infer which one of the first three sections is the experimental section. Under any other scenario, though, the experimental section can be identified after you complete the exam. Remember: every LSAT contains the same four scored section topics: 2 Logical Reasoning sections, 1 Logic Games (Analytical Reasoning) section, and 1 Reading Comprehension section. Thus, if the first and fifth sections are both Reading Comprehension sections, then the fifth section is scored and the first section is experimental. Likewise, if the first and fourth sections are both Analytical Reasoning sections, then the fourth section is scored, and the first section is experimental.