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Thank you for agreeing to participate in this study. Please carefully read the instructions. Once you have finished reading, you will need to take a quiz at the bottom of the page to ensure your understanding of the tasks. It is crucial that you answer all quiz questions correctly within a maximum of

three attempts

to proceed with the study. Otherwise, you will be directed to leave the study without payment.



The study comprises Survey-Part1, Survey-Part2, a checkout game, and a final survey. Upon completion of the study, you will receive a participation fee plus a potential bonus. The bonus is determined by your performance in the checkout game. To receive the cash reward, you must complete all parts of the study. If you leave the study before completing it, you will not receive any payment.



1. Survey – Part 1

Survey – Part 1 consists of eight questions that ask about your general opinions on self-service systems. Please answer these questions based on your real-life experiences with self-service systems.



2. Survey – Part 2

Survey – Part 2 simulates a checkout process in retail stores. Imagine you are grocery shopping and have 5 items in your cart. Your goal is to complete the checkout process as quickly as possible. At the checkout area, you have the choice between using a self-checkout or a cashier-checkout. There are two scenarios that differ in the level of effort to complete the checkout process. We explain these checkout scenarios and options below.


Scenario 1:


Option 1: Self-Checkout. You need to check out the items yourself. For each item, you need to first find the product information from a table, and then enter {{ player.action_scenario1 }}. The products in the table are {{ player.table_scenario1 }}.

To proceed, you must enter the product information correctly and click "Next Item." Refer to the screenshot below for an example.


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Option 2: Cashier Checkout. A “simulated” cashier will enter the product information for you. You will just wait for the cashier to process all five items. Refer to the screenshot below for an example.




Scenario 2:


Scenario 2 is similar to scenario 1 with the following changes:

Option 1: In the self-checkout option, the product table is now {{ player.table_scenario2 }}, and you must enter {{ player.information_scenario2 }} for each checkout item. {{ if player.treatment_group == 1 }}You need to enter the price using a slider bar. {{ endif }}{{ if player.treatment_group == 3 }}You need to enter the price using a slider bar. {{ endif }}Refer to the screenshot below for an example.


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Option 2: In the cashier checkout option, the process is the same as in scenario 1. However, the time it takes for the cashier to check out one item can be {{ if player.treatment_group == 1 }}longer{{ endif }}{{ if player.treatment_group == 2 }}shorter{{ endif }}{{ if player.treatment_group == 3 }}longer{{ endif }}{{ if player.treatment_group == 4 }}shorter{{ endif }} because {{ if player.treatment_group == 1 }}more{{ endif }}{{ if player.treatment_group == 2 }}less{{ endif }}{{ if player.treatment_group == 3 }}more{{ endif }}{{ if player.treatment_group == 4 }}less{{ endif }} work is needed.



Deciding Checkout Options

There are six questions in Survey – Part 2. For each question, you will indicate how likely you are to use self-checkout and cashier-checkout, using a slider bar (see Fig 1. below).



You can choose from 0% (which means you don’t like it at all) to 100% (which means you really like it). For example, if you put both self-checkout and cashier checkout at 50%, it is the same as “I cannot decide, so let the computer choose” (like flipping a coin). But if you really like one option more than the other, you can give it a bigger number. For example, if you want cashier-checkout, you can give it 80% (and self-checkout will be 20%), like having 8 out of 10 chances you will use cashier checkout. (Note that the sum of the percentages of self-checkout and cashier checkout you set for each scenario is always 100%.)



3. Checkout Game

Once you have expressed your preferences for all six questions in Survey – Part 2, one question will be randomly selected, and you will experience the checkout process (which involves checking out 5 items). You will be assigned to either the self-checkout or cashier checkout, based on your expressed preference for that question. There is a chance to earn a ${{ C.BONUS_PAY }} bonus if the checkout process is completed within a specific time limit, regardless of which checkout option is assigned to you. The exact time limit will be specified in the survey questions.



4. Final Survey

The final survey asks about your demographic information. Please note that, in order to receive a cash reward, you must complete all sections of the study, including Survey – Part 1, Survey – Part 2, checkout game, and final survey. If you exit the study before completing all parts, you will earn $0.




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Quiz


Now, please complete the following quiz to ensure your understanding of the tasks. You must pass the quiz by answering all questions correctly within a maximum of

three attempts

to proceed with the study. If you fail, you will be directed to leave the study without payment.



1. Survey – Part 1 consists of

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2. In Survey – Part 2, how many items are in the cart that need to be checked out?

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3. In Survey – Part 2, for the self-checkout option in scenario 1, what information about an item needs to be entered?

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4. In Survey – Part 2, for the self-checkout option in scenario 2, the items in the product table are listed

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5. In Survey – Part 2, if I give 70% to cashier-checkout and 30% to self-checkout in one question, what does that mean?

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6. Which of the following statements regarding the checkout game is not true?

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7. Which of the following statements regarding the ${{ C.BONUS_PAY }} bonus in the checkout game is true?

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8. Which of the following statements is true?

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9. In order to continue the study, I must correctly answer all questions in this quiz within ______ (how many) attempts?

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