How would you estimate study time more accurately for a task?

• A. Break the task into subtasks, estimate each, add buffers, and calibrate with past durations; use reference-class estimation.
• B. Guess the duration randomly
• C. Double the duration immediately
• D. Only estimate after finishing

Answer: (A)

Estimating study time accurately comes from planning by breaking the task into smaller subtasks, estimating each part, adding buffers, and checking those estimates against past tasks that are similar. This approach uses a practical form of reference-class estimation: you compare the current task to tasks you’ve completed before and adjust based on what you learned from those experiences. By looking at each component, you can see where time tends to go and where surprises might arise, rather than treating the whole task as a single unknown. Adding buffers acknowledges the normal variability—things taking longer than expected, small interruptions, or the need for extra review—and calibrating your estimate with past durations keeps your planning honest and realistic. Over time, this builds a more reliable expectation for future work instead of relying on a quick, unsupported guess.

Random guesses lack any basis and often miss the mark, leading you to under- or over-plan. Doubling the duration immediately is a blunt rule that ignores task specifics and your own past performance, so it can misestimate many tasks. Waiting until after finishing to estimate won’t help you plan now and misses chances to allocate time effectively and stay on schedule.