What you do
Make rapid discriminations as objects approach at various speeds while staying alert to hazards.
Skills targeted
  • Visual attention
  • Rapid detection of visual stimuli
  • Adjustment to poor visibility conditions
How the exercise changes
  • Target vehicles become more similar
  • Driving conditions
  • Number and type of distracters
How you're scored
Your score is in milliseconds. As you improve, the vehicles move faster giving you less time to make the visual discriminations. Your score is the number of milliseconds the vehicles are on screen

Imagine you're driving along, when suddenly, an obstacle appears out of nowhere. What do you do? Did you notice it in time? And can you react quickly enough to avoid it safely?

The ability to drive, run, cycle, or walk safely through the world depends largely on your ability to notice potential hazards in your peripheral vision while simultaneously paying attention to the road in front of you.

Optic Flow requires you to make rapid visual discriminations in the center of your gaze while staying alert to potential hazards in the periphery. The task takes place in different navigation conditions including simulations of rain, fog, and night. 

In Optic Flow, you'll see a target shape on a sign. Vehicles and various roadside objects will approach at different speeds, and your task is to select the one with the shape that matches the target. At any point a hazard (tires, armadillos, birds, etc.) might enter the scene and you will need to press the response key if it is on a path to hit your vehicle. As you identify the correct shape and avoid hazards, the action will move faster and faster.

As you move through the exercise, it gets harder in these ways:

  • The shapes on the vehicles become more similar.
  • The driving conditions change, making it more difficult to find the target shape and avoid hazards. As on the actual road, speed must be reduced to perform accurately as the conditions change (time of day, and weather).
  • The number and type of hazards change.
  • The backgrounds become more complex and distracting as you move from the desert to the suburbs, and finally to the bustling city.
  • The exercise adapts to your performance by reducing the time you have to find the target shape.
Screenshots (click to enlarge)