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In Phase 1, you will see a series of numbers and will be asked to classify whether each number is larger or smaller than {{ Constants.threshold }}. If the number displayed is smaller than {{ Constants.threshold }}, press the “A” key on your keyboard. If the number displayed is larger than {{ Constants.threshold }}, press the "L" key.
Your bonus payment will depend on the speed and accuracy of your classification. Specifically:
where "accuracy" is the percentage of trials where you correctly classified the number as larger or smaller than {{ Constants.threshold }}, and "speed" is the average amount of time it takes you to classify the number on all trials throughout the study, in seconds.
Thus, you make the most money by answering as quickly and as accurately as possible.
For example, if you correctly classified the number on all trials and it took you 0.3 seconds to respond to each question, you would earn £(1.5 x 100% - 10 x 0.3) = £1.20. If instead you only classified 70% of the numbers correctly and took 0.8 seconds to respond to each question, you would earn £(1.5 x 70% - 10 x 0.8) = £0.25.
Phase 1 will be separated into 3 parts of 50 trials each. In between, you can take a short break.
Before starting with the classification task, you will be asked a question to check your understanding of the instructions. You will be allowed to continue only if you answer this question correctly.
When you are ready to continue with the comprehension question, press ENTER.