You’ll be randomly paired with a partner who’s online and using the feature. Over a two-minute period, you and your partner will:
- View the same set of images.
- Provide as many labels as possible to describe each image you see.
- Receive points when your label matches your partner’s label. The number of points will depend on how specific your label is.
- See more images until time runs out.
http://images.google.com/imagelabeler/