Captcha-like Data Entry

We are doing a research project on the readability of captcha-like codes. A web page will display an image that looks similar to a captcha code. You will enter the code (approximately 10 characters) and click submit. Another code will be displayed immediately, you will continue the same process. This is a full-time job for 8 hours. You must work a minimum of 6 hours time, during the 8 hour period. On average, first-time testers complete one image every 8 seconds. The pay is 0.05 USD per image. For 8 hours work, the average pay is $180, or $22.50 per hour. If you work slow, for example, one image every 10 seconds, this will be approximately $144, or $18.00 per hour. The first project will run today, 5/25/2012 starting at 20:00 GMT to 04:00 GMT (8 hours total). You can choose to work a minimum of 2 days, up to 5 days maximum. For the first day, the hours are fixed because we must monitor and train you, you must start exactly at 20:00. You must work a minimum of 6 hours during that time. All freelancers will be paid each day, at the end of the day, through Freelancer.com.