What Crowdsourcing Is

Crowdsourcing is the practice of obtaining input or information from a large number of people via the Internet. It converts what would require a small team of specialists into a distributed activity across potentially millions of participants.

Crowdsourcing works because:

• The Internet connects enormous numbers of people who can each contribute a small amount
• Aggregating many small contributions produces results no individual could achieve
• The “crowd” collectively contains knowledge, skills, and perspectives no single team possesses
• Many tasks that required expensive specialists can be done by motivated non-experts

Citizen Science

Citizen science is scientific research conducted wholly or partly by distributed individuals, many of whom are not professional scientists, who contribute relevant data using their own computing devices.

Citizen science turns scientific data collection from a bottleneck into a distributed process:

• Galaxy Zoo: Volunteers classify galaxy images from telescope data -- a task impossible for a small team given the volume of images
• eBird: Birdwatchers log sightings, creating the world's largest database of bird observations
• Folding@home: Volunteers donate idle computer processing power to simulate protein folding for disease research
• iNaturalist: Volunteers photograph plants and animals, building biodiversity databases
• SETI@home: Volunteers donated processing power to analyze radio telescope data for signs of extraterrestrial intelligence

The key characteristic: participants contribute real data that advances genuine scientific research, not just their own knowledge.

Other Models of Crowdsourcing

Beyond citizen science, crowdsourcing has created new models for many activities:

How the Internet Enables Crowdsourcing

Before widespread Internet access, crowdsourcing at scale was logistically impossible. The Internet provides:

• Coordination without geography: Contributors anywhere can participate in the same project
• Aggregation infrastructure: Platforms collect, store, and process contributions automatically
• Low barrier to contribution: Participants need only a connected device, not specialized equipment or travel
• Real-time feedback: Contributors see results of collective effort, providing motivation to continue

Practice MCQs

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