Double Decision is a complex task that challenges one's useful field of view. The task in Double Decision is to choose which of two cars appeared briefly in the middle of the screen. A second, simultaneous task is to notice where a Route 66 road sign appears in the periphery of the screen.
Here's how the exercise works:
1. Two vehicles are shown. These are the two possible vehicles displayed in this level.
2. One of two vehicles is displayed in the road ahead for a short period of time, along with a Route 66 road sign.
- On more difficult levels, distractor signs will also appear.
3. Visual noise, black and white static, is displayed for a short period of time to clear retina of visual artifacts.
4. Both possible vehicles are shown again on the road.
- Select a vehicle to continue. If missed the vehicle during step 2, guessing is permitted. (Tip: Follow your instincts, often you know the correct answer even if you are not confident.)
- Selecting the wrong vehicle will end the trial. Skip to step 6.
5. After selecting the correct vehicle, select on the section of the screen in which the peripheral sign appeared.
6. After answering correctly, the next trial will have a shorter display time on step 2, making the task harder. An incorrect response causes the next trial to have a longer display time on step 2, making the task easier.
7. This sequence of events will repeat until the level is completed.
For information on how this exercise works click here.