# placebo button

> push-button or other control which has apparent functionality but has no physical effect when pressed

**Wikidata**: [Q769396](https://www.wikidata.org/wiki/Q769396)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Placebo_button)  
**Source**: https://4ort.xyz/entity/placebo-button

## Summary
A placebo button is a push-button control that appears functional but has no actual physical effect when pressed. These devices create the illusion of user control while performing no real operation.

## Key Facts
- **Aliases**: Botón de placebo, Boton placebo, Boton de placebo, プラシーボ・ボタン, プラセボボタン, プラシーボボタン, Кнопка-плацебо
- **Freebase ID**: /m/06zr_v2
- **Classification**: Subclass of push-button
- **Wikidata Description**: "push-button or other control which has apparent functionality but has no physical effect when pressed"
- **Sitelink Count**: 5 (across Wikipedia language editions)
- **Wikipedia Title**: Placebo button
- **Wikipedia Languages**: English, Spanish, French, Indonesian, Russian

## FAQs
### Q: What is the purpose of a placebo button?
A: Placebo buttons create the perception of user control or responsiveness, often used to manage expectations or improve subjective user experience, despite providing no actual function.

### Q: Are placebo buttons intentionally deceptive?
A: While they don't perform their apparent function, their use is typically justified within design principles focused on user experience and behavioral psychology, not outright deception.

### Q: Where are placebo buttons commonly found?
A: They are frequently encountered in elevators (close/open buttons), crosswalk signals, and other public interfaces where immediate action is impossible but user feedback is valuable.

### Q: Do placebo buttons have any real effect?
A: No, by definition, pressing a placebo button produces no physical effect on the device or system it is part of.

## Why It Matters
Placebo buttons address a fundamental challenge in interface design: managing user expectations and satisfaction when immediate action isn't feasible or practical. They leverage the placebo effect in human-computer interaction, providing psychological satisfaction and perceived agency where none exists functionally. This strategy can reduce user frustration and perceived system latency, improving overall usability in environments like public transportation and elevators. While controversial, they represent a pragmatic tool for designers navigating the gap between user perception and system reality, highlighting the importance of perceived responsiveness in human-centered systems.

## Notable For
- **Deceptive Functionality**: Unique among controls for its intentional lack of physical effect despite appearing operational.
- **Psychological Utility**: Primarily distinguished by its function of exploiting the placebo effect to manage user experience.
- **Public Interface Presence**: Notably common in high-traffic public systems like elevator panels and pedestrian signals.
- **Subversion of Expectations**: Represents a deliberate design choice to prioritize perceived control over actual function.

## Body
### Definition and Core Function
A placebo button is a push-button control designed to simulate functionality without delivering any actual physical effect when activated. It operates purely on a psychological level, creating the appearance of control or responsiveness for the user.

### Classification and Relationships
- **Parent Class**: It is a subclass of `push-button`, inheriting the basic mechanism of an area that can be temporarily pushed down to control a device.
- **Distinction**: Unlike functional push-buttons, its defining characteristic is the absence of physical effect upon activation.

### Common Applications
Placebo buttons are frequently observed in:
- Elevator control panels (where "Close Door" buttons often have no function once the doors are closing automatically).
- Pedestrian crosswalk buttons (where pressing may only register the request if the system is already in a state to respond).
- Other public interfaces where immediate user action is impossible but feedback is desired.

### Significance in Design
Their use stems from the recognition that perceived control and responsiveness significantly impact user satisfaction, even when objective functionality is constrained by technical or operational realities. They represent a design trade-off prioritizing user experience over literal functionality in specific contexts.

## References

1. Freebase Data Dumps. 2013