A good night's sleep is important to have strong memory, finds a new study by researchers from University of Michigan and the University of California, Irvine.

The research seems to provide an answer to the question of those who have a bad memory. For the study, researchers Stephen Frenda and Kimberly Fenn carried out tests on 104 students. They were given task to recall the details of the photographs of a simulated burglary.

Researchers noticed that the volunteers, who did not have sound sleep during the night, not only missed the tests, but they also made mistakes in them. There were some volunteers, who even added the incidents that have not happened.

One more research also stresses that sleep improves learning and memory. The recent study was one of a kind as it was based on the tests of situational memory responses. Lead researcher Stephen J Frenda was of the view, "I was surprised to find that there were so few empirical studies connecting sleep deprivation with memory distortion in an eyewitness context".

The study findings are important and especially for those who are either serving as or are dependent on witnesses in the criminal justice system. Researchers said sleep deprivation can have negative effect on the lives of those who suffer from it.

The Centers for Disease Protection has even called sleep deprivation as endemic. It can cause more problems including high blood pressure, diabetes and road accidents. In fact, lack of sleep affects mood greatly.

Researchers have suggested that if people are witnessing symptoms of sleeplessness then they should consult doctor or should try different therapies that calm mind and help in having a good sleep in night. The study has been published in the journal Psychological Science.