Three simple ways for those who find it difficult to concentrate. Research confirms that every year our attention span decreases. This affects both professional and personal life. Fortunately, you can detect the problem in time and solve it with a few simple steps. Determining the level of concentration is not difficult. On the Internet, you can find several tests at once, for example, in English or in Russian. You can also use Schulte tables - they are usually used to develop speed reading s...