Version of the birth of dreams
So, it is believed that each person dreams in color and black-and-white dream, and the brighter and richer the day passed, the more you can see his "reflection" in my sleep.
According to another version, dream can see only the people suffering from disorder of the nervous system or patients with schizophrenia. This theory is difficult to accept, because it turns out that 80% of people on planet Earth - schizophrenics...
Vivid dreams come to sleeping with high intelligence. But this hypothesis was disproved by scientists using surveys with different segments of the population. The intellectual level does not affect the dream's content or its type.
Curiously, colorful dreams appeared only with the advent in the life of a color film. This observation was based on a study of the dreams of people of different generations. And as it turned out, the youth, who from birth is watching colour TV, sees vivid dreams much more often than people who were born during the black-and-white cinematography. However, there are those who doubt the veracity in this argument, arguing that older people simply earn less emotion than active youth.
There is one interesting clarification: in dreams, like reality, is in the right side of the brain, which is actively developed at the "lefties", that is, it is believed that such people have dreams more vividly and realistic. Scientists claim that if you want your dreams become more memorable, you just need to develop your left hand.
Diagnostics
We can confidently say that sleep is a "second life" of every sleeper, so if you want your dreams were more vivid, colourful and memorable, it is necessary first to saturate the everyday life of the same emotions and experiences. Because a dream is just a reflection of what you see, feel and experience every day.
If you carefully interpret your dreams, you can look deep inside yourself. About the desires that lie in the subconscious, about your mental state and even physical health you can learn from his own dreams.
I would also like to note that if you are constantly having the same painful and black-and-white dreams, you may need something urgently to change in your real life.