Star Search is an Attention game on Lumosity.com.
You will get a certain amount of time to complete as many turns as you can. In each turn, you will be presented with a collection of objects and have to choose one that is unique. Correct answers will earn you points.
Choosing accurately and quickly will increase your level, as you gain levels the differences will become harder to spot.
The objects will vary by shape, color, orientation (e.g. which way the triangle seems to point) and pattern. On later levels they will start to rotate in different directions and speeds.
Often the unique object is cleverly hidden by being very similar to other objects - for example there are many striped diamonds, but only one is yellow (a color that will likely be represented on other groups of objects).