The aim of this activity is for you to try to elicit mental models from people. In particular, the goal is for you to understand the nature of people's knowledge about an interactive product in terms of how to use it and how it works. 1. First, elicit your own mental model. Write down how you think contactless cards workwhere customers place their debit or credit card over a card reader. If you are not familiar with contactless cards, do the same for a smartphone app like Apple Pay or Google Pay. Then answer the following questions: a. What information is sent between the card/smartphone and the card reader when it is placed in front of it? b. What is the maximum amount you can pay for something using a contactless card, or Apple/ Google Pay? c. Why is there an upper limit? d. How many times can you use a contactless card or Apple/Google Pay in a day? e. What happens if you have two contactless cards in the same wallet/purse? f. What happens when your contactless card is stolen and you report it to the bank? 2. Next, ask two other people the same set of questions. Now analyze your answers. Do you get the same or different explanations? What do the findings indicate? How accurate are people's mental models about the way contactless cards and smartphone Apple/Google Pay work