I've posted my first HIT. It went well but the accuracy of the sample tasks done wasn't as high as we wanted. I'll try to put 30 different pictures to be identified. The premise of my HIT is to identify freight trucks in a series of images, using guides given in the instructions. I hope we get better results. Last time, not many people answered for the truck head (admittedly was the fault of the interface). But since it's been fixed, I will reject submissions if it's left blank. What I want is for some workers to do a small trial test and depending on their accuracy of their answers, we can qualify them to identify the rest of our tasks. I've been told that I can do something like that, but I don't know how I can do that. Thank you for those who did some of those tasks in the first run. That was just a test so everybody got approved regardless of their answers. There were some confusion with the instructions and the interface does need a little bit of work, but I'm going to get a little more strict for better accuracy next time. Edit: I have messed up my second batch by requiring multiple location qualifications at the same time. I send a third batch to fix that. I think people should be able to answer now.