---
title: "Collective intelligence pros and cons"
subject: "Information System"
chapter: 4
key: "semester_8/information_system:collective-intelligence-pros-cons"
source: https://www.bctengineer.com/q/semester_8/information_system/collective-intelligence-pros-cons
site: BCT Engineering
---

# Collective intelligence pros and cons

Information System · Chapter 4: Decision support and Intelligent systems

- Asked in: 2074 Magh, 5+3 marks
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_8/information_system/collective-intelligence-pros-cons
- Whole chapter: https://www.bctengineer.com/md/semester_8/information_system/chapter-4

## Question

What are the pros and cons of collective intelligence? Give some examples.

## Short answer

Collective intelligence offers diverse perspectives, faster problem solving, low cost, and self-correction, but faces challenges like unreliable content, groupthink, manipulation, and moderation effort. Examples include Wikipedia and Stack Overflow, while downsides include fake reviews and herd behaviour on social platforms.

## Answer

**Collective Intelligence** is the combined knowledge and problem-solving ability of a group, arising from the collaboration of many people, usually through the Internet.

#### Pros
1. **Wide knowledge and diverse views** give better solutions.
2. **Better decisions** - the "wisdom of the crowd" averages out individual errors (in estimates and predictions).
3. **Speed and scale** - large problems are divided among many contributors.
4. **Low cost** - volunteers or users supply content (Wikipedia, open source).
5. **Innovation** - crowdsourced ideas and design contests.
6. **Self-correcting and kept up to date** by many contributors.
7. **Participation and engagement** of employees and customers.

#### Cons
1. **Quality and accuracy issues** - misinformation, vandalism and bias.
2. **Groupthink and herd behaviour** - people copy the majority.
3. **Manipulation** - fake reviews, bots, spam, trolls.
4. **Privacy and legal issues** - copyright, ownership of contributions.
5. **Needs moderation** and coordination, which cost effort.
6. **Unequal participation** - a few active users dominate.
7. **Difficulty in accountability** - nobody is responsible for errors.

#### Examples
- Wikipedia, open-source software (Linux), Stack Overflow, Google Maps and Waze traffic reports, online product reviews, prediction markets, crowdfunding (Kickstarter).
- Failures: fake reviews on shopping sites and rumours spread on social media.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. Why does the 'wisdom of the crowd' give better decisions?
   A. The majority is always right
   B. Averaging many contributions cancels out individual errors
   C. Experts are excluded
   D. Everyone copies the leader
   Answer: B. Aggregating many views averages out individual errors, e.g. in estimating or predictions. (Key point: Wisdom of the crowd)

2. Which is a drawback of collective intelligence?
   A. Low cost
   B. Self-correction
   C. Groupthink and herd behaviour, where people copy the majority
   D. Speed and scale
   Answer: C. Groupthink is a listed con; the others are advantages. (Key point: Cons: groupthink)

3. Fake reviews, bots and spam illustrate which problem of CI?
   A. Manipulation
   B. Low cost
   C. Innovation
   D. Scale
   Answer: A. Fake reviews, bots, spam and trolls are examples of manipulation. (Key point: Cons: manipulation)

4. Which is an example of CI?
   A. A single-author private report
   B. Wikipedia and open-source software such as Linux
   C. A paper manual
   D. A stand-alone calculator
   Answer: B. Wikipedia, Linux, Stack Overflow, Waze and crowdfunding are listed CI examples. (Key point: Examples)

## Related in Information System

- [Collective intelligence and KMS](https://www.bctengineer.com/question.md?key=semester_8%2Finformation_system%3Acollective-intelligence-km) — Information System, chapter 4
- [Meaning of collective intelligence](https://www.bctengineer.com/question.md?key=semester_8%2Finformation_system%3Acollective-intelligence-meaning) — Information System, chapter 4

## Related in other subjects

- [Harnessing collective intelligence in Web 2.0](https://www.bctengineer.com/question.md?key=semester_7%2Fweb_technology%3Acollective-intelligence-web2) — Web Technology, chapter 6
- [Distribution layouts, pros/cons, improvements](https://www.bctengineer.com/question.md?key=semester_5%2Fwater_supply_engineering%3Adistribution-layouts-improvements) — Water Supply Engineering, chapter 7, asked 4×
- [Phase shift method of SSB generation: pros and cons](https://www.bctengineer.com/question.md?key=semester_6%2Fcommunication_systems%3Assb-phase-shift-pros-cons) — Communication Systems, chapter 2, asked 2×
- [Brushless excitation pros and cons](https://www.bctengineer.com/question.md?key=semester_8%2Fpower_plant_design%3Abrushless-pros-cons) — Power Plant Design, chapter 4