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Game-board during incentive + feedback condition: coins are displayed pictorially in a 7 × 10 matrix on the left of the screen and turn from dark blue to gold to indicate coin achievement. A separate row of coins above indicates the number of coins awaiting award at the next 10 s time-point (one coin in this example). The coin score (bottom) and remaining game time are presented in numerals on the left of the screen.
