Any other requirements

The tasks selected to be included in the study might add requirements, such as the necessity to purchase entrance tickets to a conference (in order to test the in-house navigation system) or the need to pick up an order in a store or restaurant. If a purchase is being tested, is dummy credit card data available for the participants to use, or does the study budget include compensation for any costs incurred? If costs will be compensated, the maximum limit has to be set.