Halving a deadline costs 1.4% of marks each time

Does it make a difference if you submit early vs submit late? Here’s some empirical data.

About ~1,000 students at IIT Madras took 3 online quizzes (GA1, GA2, GA3) in the last few weeks. The deadlines were all at midnight (India) on different days. Here’s when they submitted their final answers:

  • There was a spurt of submissions at the last minute.
    ~1 out of 8 students submit with < 10 minutes remaining.
  • Most students submitted ~4 hours before the deadline.
    In fact, 3 out of 4 students submit on the same day as the deadline.
  • A fair number of students submitted the previous day/night.
    1 out of 6 are diligent and submit a day early.

But does submitting late help, since you get more time? Apparently not.

On average, every time the deadline is halved, the score drops by 1.4%.

For example, on average:

  • Submitting 1 minute before scores 1.4% less than submitting 2 minutes before
  • Submitting 2 minutes before scores 1.4% less than submitting 4 minutes before
  • Submitting 4 minutes before scores 1.4% less than submitting 8 minutes before
  • … etc.

This means that submitting early morning instead of midnight could give you a 15% advantage.

Of course, this might be confusing cause and effect. Maybe students who do well submit early, and those who struggle submit late.

But is there a merit in faking it till you make it? Perhaps by pretending your deadline is a day early, to get the best of both worlds? Something to think about…

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