- Researchers only took a look at studies released in English and Chinese, implying they may have missed out on research studies in other languages on the impact of listening to music on sleep in older adults. - Outcomes may not use to older adults with Alzheimer's illness or Parkinson's illness. - In the studies scientists used, people who listened to music got more attention from scientists than did individuals who got basic or no treatment for their sleep problems.
- Given that the different research studies used different type of music, researchers could not single out which kind of calming music improved sleep one of the most. - All of the people in the research study had comparable type of sleep problems. This indicates listening to music may not help individuals with other kinds of sleep issues.