For example, people may not really want to participate in the questionnaire, so they may write answers that are not true just to finish it. This will then be classified as unreliable data. Secondary Research: Secondary research is research that has already been conducted by someone else. For example, books, magazines, the Internet, etc. A strength of secondary research is that it saves time and is easily accessible. For example, if someone needs information to use quickly, they can go to the Internet and they will have access to a set of information that they can use, instead of having to create a search method to use and then go out and collect the data which will be faster to go and use someone else's data. Another strength of secondary research is its low cost (Knowthis.com, 2015). For example, because someone else already conducted the research, they would be the one to pay for the equipment, whereas the researcher using it now will not have to. Whereas if they were going to do primary research they would have to spend money on travel expenses, equipment, and may need to pay participants to participate.,