Bonus Payment Calculation

For a given question, the computer uses a binary scoring rule (BSR) to decide whether you win the extra $1.

The probability you have of winning the extra $1 is calculated as follows:

Prob = 0.8 × (1 - (x - p)²)

where x is the true answer and p is your guess.

This rule means that the closer your guess is to the true answer, the better chance you have of winning the bonus payoff (up to a maximum of an 80% chance of winning if your guess is the same as the true answer). The optimal strategy is to try to guess as best you can.