This is a web-based experiment that asks people to report values they see in a series of charts. There will be two blocks of charts with different questions for each block. There is a page between the two blocks of questions to help remind you of the question change. You'll also be asked some additional questions for verification purposes and for demographics. Participation takes between 15 and 25 minutes.
Please enter your Amazon Worker Id. You may only complete this HIT once. Subsequent completions will not be accepted:
Our records show that you have taken part in this study before, so we cannot allow you to take this HIT again at this time. Please contact us if you feel this is in error.
Note: this HIT requires a modern browser. If you are not using Chrome or Firefox, the "I Agree" button may not activate even after entering your workerId.