How to Design HIT Properties

The following suggestions are based on my experiences, and the feedback received from thousands of Workers.

Create unique titles for your HITs, and clearly describe what you are asking Workers to do.  

• Use phrases like "Invitation Only" and "Bonus Offer" to communicate and attract the appropriate people. 
• When you want to launch a batch of HITs, make sure the following information is exactly the same for the HITs you want to include in the batch:  title; description; keywords; reward per assignment; results are automatically approved in; time allotted per assignment; and masters' and additional qualifications.

Pay at least 10 cents per minute.  Workers are more likely to be interested in the HIT, which means they are more likely to be thorough and conscientious when completing it. It also helps you build a positive reputation, which can benefit the quality and speed of data collection.

Give Workers plenty of time to complete your HITs.  Several Workers recommended at least 24 hours.  They can accept the HIT, and come back to it later when they are ready.

Be careful with assigning qualifications.  

• They are all or nothing, meaning only Workers who have all of them can participate.  For example, assign only 1 'Location' qualification.  If you set 2 locations, then no Worker qualifies (because no worker is from 2 locations). 

• Use Workers' approval totals and ratings as qualifiers to weed out "scammers", but don't set the requirements so high that you eliminate most of the workforce.