It is the responsibility of the lab manager to maintain any supply of petty cash in-lab studies may need. It is important to keep each cash envelope separated by grant, advancement request # (e.g. ER-####), and study, so as to not use money from other projects. It is most preferable to request the amount of funds needed within a 3 month span of data collection.
A few days prior to putting your study online, check the account balance and alert the lab manager if the funds are too low. Notify the lab manager how much money would like to top up the mTurk account balance and wait until the lab manager gives you the green light.
For a tutorial on an easy/automated way of paying out mTurk bonuses, click here.
For a tutorial on compensating mTurkers for partial completion or technical issues, click here.