Deception by Design: A Temporal Dark Patterns Audit of McDonald's Self-Ordering Kiosk Flow
This paper presents a structured audit of McDonald's self-ordering kiosks in Germany using the Temporal Analysis of Dark Patterns (TADP) framework to reveal how multi-level manipulative design strategies accumulate within the linear interaction flow to exploit time-pressured users.
Original paper licensed under CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Imagine walking into a McDonald's, hungry and in a rush. You see a shiny new touchscreen kiosk instead of a cashier. It looks friendly and helpful, promising to make ordering your lunch easy. But what if that screen was actually a digital maze designed to trick you into spending more money than you planned?
That is exactly what this paper investigates. The researchers acted like digital detectives, walking through a McDonald's kiosk in Germany to uncover the "traps" hidden in the design. They call these traps Dark Patterns.
Here is a simple breakdown of their findings, using some everyday analogies:
1. The "Time-Pressured" Shopper
The researchers didn't just look at the screen; they pretended to be a customer who is late for work. They didn't stop to think deeply about every choice. They just grabbed the first thing that looked good.
- The Analogy: Imagine trying to grab a sandwich while someone is chasing you. You don't have time to read the fine print or compare prices. The kiosk knows this. It counts on you being too busy to say "no."
2. The Three Layers of Tricks
The study found that the tricks happen on three different levels, like a Russian nesting doll:
Level 1: The Single Screen (The "Bright Sign" Trick)
- What happens: When you pick a burger, the screen suddenly flashes a big yellow banner saying, "Hey! This item is back! Everyone loves it!"
- The Trick: It uses Social Engineering. It's like a salesperson saying, "This is the last one left!" even if there are a thousand more in the back. It also uses Visual Prominence—making the "Add a Meal" button huge and bright, while the "No, thanks" button is tiny and gray.
- The Result: You feel pressured to say yes because the "No" option feels invisible or rude.
Level 2: The Journey Between Screens (The "Treadmill" Trick)
- What happens: Once you pick a burger, you can't just pay. You must go through a series of screens: "Make it a meal?" -> "Pick a side?" -> "Pick a drink?" -> "Add a dessert?" -> "Add a sauce?"
- The Trick: This is called Obstruction and Adding Steps. It's like walking through a store where every aisle forces you to stop and look at a display before you can walk to the next one.
- The Result: The longer you stay, the more likely you are to add extra items just to get through the process. The screen also hides the total price until the very end, a trick called Partitioned Pricing. It's like buying a car and only finding out about the "delivery fee" and "dealer prep fee" after you've already signed the contract.
Level 3: The Whole System (The "Trap Door" Trick)
- What happens: If you try to cancel your order or go back to the start, the kiosk makes it incredibly hard. It asks, "Are you sure you want to cancel?" and makes you click "Yes" multiple times. But adding an item? That's just one tap.
- The Trick: This is Asymmetry. It's like a door that swings open easily to let you in but is locked tight to keep you from leaving.
- The Result: You feel too annoyed or guilty to cancel, so you just pay for the extra fries you didn't really want.
3. The "Guilt Trip" Button
One of the most clever (and annoying) tricks found was on the "No thanks" buttons.
- The Analogy: Imagine a waiter asking, "Do you want a cookie?" and when you say no, they look sad and say, "Oh, no thanks? I guess you just don't like cookies."
- The Reality: The kiosk uses Confirmshaming. Instead of a neutral "No," the button says "No thanks!" with an exclamation point. It frames your refusal as a personal rejection of the restaurant's generosity, making you feel slightly guilty for saying no.
4. Why This Matters
The researchers found that these aren't just small annoyances. They are a systematic strategy.
- The "Accumulation" Effect: One small trick might not work. But when you combine a bright sign, a long journey, hidden prices, and a guilt trip, the pressure builds up.
- The Real-World Impact: Because of these designs, McDonald's reports that people spend 11% to 30% more when using kiosks than when ordering at a counter.
The Big Takeaway
This paper warns us that self-ordering kiosks aren't just tools; they are salespeople. They are designed to exploit our human weaknesses (like being in a hurry, feeling guilty, or getting tired of clicking "next").
The authors argue that we need new rules to protect us. Just as we have laws against false advertising on TV, we need laws against digital traps in physical places like restaurants. If a store could trick you into buying a bigger burger by hiding the exit door, it would be illegal. The same should apply to the screens we touch every day.
In short: The kiosk isn't there to help you order lunch; it's there to make sure you order more lunch, and it's very good at hiding the fact that it's doing so.
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