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Study Finds Light Color Affects Mood From VOA Learning English, this is the Health Report. Some colors that people see late at night could cause signs of the condition mental health experts call __________. That was the finding of a study that builds on earlier study findings. They show that individuals who live or work in low levels of light overnight can develop clinical depression. Doctors use the words clinical depression to describe __________ form of depression. Signs may include loss of interest or __________ in most activities, low energy levels and thoughts of death or suicide. In the new study, American investigators designed an experiment that exposed hamsters to different colors. The researchers chose hamsters because they are nocturnal, which means they sleep during the day and are __________ at night. The animals were __________ into 4 groups. One group of hamsters was kept in the dark during their nighttime period. Another group was placed in blue light, a third group slept inwhite light. While a fourth was put in red light. After four weeks, the researchers noted how much sugary water the hamsters drank. They found that the more depressed animals drank the least amount of water. Randy Nelson heads the Department of Neuroscience at Ohio State University. He says animals that slept in blue and white light __________ to be the most depressed. | 
